./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 6c24879c 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-?-6c24879 [2022-07-11 23:53:19,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:53:19,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:53:19,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:53:19,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:53:19,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:53:19,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:53:19,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:53:19,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:53:19,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:53:19,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:53:19,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:53:19,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:53:19,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:53:19,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:53:19,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:53:19,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:53:19,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:53:19,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:53:19,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:53:19,408 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:53:19,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:53:19,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:53:19,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:53:19,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:53:19,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:53:19,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:53:19,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:53:19,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:53:19,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:53:19,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:53:19,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:53:19,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:53:19,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:53:19,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:53:19,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:53:19,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:53:19,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:53:19,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:53:19,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:53:19,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:53:19,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:53:19,422 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:53:19,435 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:53:19,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:53:19,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:53:19,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:53:19,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:53:19,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:53:19,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:53:19,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:53:19,438 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:53:19,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:53:19,438 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:53:19,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:53:19,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:53:19,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:53:19,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:53:19,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:53:19,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:53:19,439 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:53:19,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:53:19,439 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:53:19,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:53:19,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:53:19,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:53:19,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:53:19,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:53:19,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:53:19,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:53:19,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:53:19,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:53:19,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:53:19,441 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:53:19,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:53:19,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:53:19,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9a657fa9aacca0974ed9e42f1311e36e1c5af368a54222ebad4a487f8951064 [2022-07-11 23:53:19,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:53:19,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:53:19,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:53:19,662 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:53:19,664 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:53:19,665 INFO L432 ainManager$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 [2022-07-11 23:53:19,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31c727aeb/e4235063333044ff945b8356b3928c7f/FLAG2951ca116 [2022-07-11 23:53:20,149 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:53:20,153 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c [2022-07-11 23:53:20,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31c727aeb/e4235063333044ff945b8356b3928c7f/FLAG2951ca116 [2022-07-11 23:53:20,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31c727aeb/e4235063333044ff945b8356b3928c7f [2022-07-11 23:53:20,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:53:20,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:53:20,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:53:20,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:53:20,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:53:20,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:20,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a5b081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20, skipping insertion in model container [2022-07-11 23:53:20,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:20,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:53:20,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:53:20,617 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] [2022-07-11 23:53:20,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:53:20,651 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:53:20,816 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] [2022-07-11 23:53:20,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:53:20,847 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:53:20,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20 WrapperNode [2022-07-11 23:53:20,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:53:20,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:53:20,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:53:20,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:53:20,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:20,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:20,972 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 788 [2022-07-11 23:53:20,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:53:20,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:53:20,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:53:20,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:53:20,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:20,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:20,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:20,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:21,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:21,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:21,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:21,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:53:21,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:53:21,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:53:21,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:53:21,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20" (1/1) ... [2022-07-11 23:53:21,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:53:21,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:53:21,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 23:53:21,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 23:53:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:53:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-11 23:53:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:53:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:53:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-11 23:53:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:53:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:53:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:53:21,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:53:21,342 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:53:21,343 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:53:21,354 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:53:22,136 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-11 23:53:22,136 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-11 23:53:22,137 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:53:22,141 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:53:22,141 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-11 23:53:22,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:53:22 BoogieIcfgContainer [2022-07-11 23:53:22,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:53:22,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:53:22,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:53:22,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:53:22,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:53:20" (1/3) ... [2022-07-11 23:53:22,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c558a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:53:22, skipping insertion in model container [2022-07-11 23:53:22,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:20" (2/3) ... [2022-07-11 23:53:22,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c558a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:53:22, skipping insertion in model container [2022-07-11 23:53:22,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:53:22" (3/3) ... [2022-07-11 23:53:22,148 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.10.i.cil-1.c [2022-07-11 23:53:22,157 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:53:22,157 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:53:22,188 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:53:22,192 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@596fc087, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@49a41d53 [2022-07-11 23:53:22,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:53:22,196 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) [2022-07-11 23:53:22,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:53:22,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:22,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:22,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash 917223054, now seen corresponding path program 1 times [2022-07-11 23:53:22,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:22,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122992367] [2022-07-11 23:53:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:22,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:22,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122992367] [2022-07-11 23:53:22,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122992367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:22,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:22,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:22,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629163974] [2022-07-11 23:53:22,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:22,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:22,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:22,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:22,556 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) [2022-07-11 23:53:24,156 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:53:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:24,523 INFO L93 Difference]: Finished difference Result 415 states and 704 transitions. [2022-07-11 23:53:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:24,526 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 [2022-07-11 23:53:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:24,533 INFO L225 Difference]: With dead ends: 415 [2022-07-11 23:53:24,533 INFO L226 Difference]: Without dead ends: 252 [2022-07-11 23:53:24,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:24,537 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 152 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:24,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 429 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-11 23:53:24,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-11 23:53:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 175. [2022-07-11 23:53:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.603448275862069) internal successors, (279), 174 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 279 transitions. [2022-07-11 23:53:24,570 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 279 transitions. Word has length 44 [2022-07-11 23:53:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:24,571 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 279 transitions. [2022-07-11 23:53:24,571 INFO L496 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) [2022-07-11 23:53:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 279 transitions. [2022-07-11 23:53:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 23:53:24,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:24,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:24,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:53:24,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:24,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1833262993, now seen corresponding path program 1 times [2022-07-11 23:53:24,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:24,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476154066] [2022-07-11 23:53:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:24,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:24,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:24,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476154066] [2022-07-11 23:53:24,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476154066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:24,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:24,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:24,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588918953] [2022-07-11 23:53:24,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:24,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:24,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:24,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:24,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:24,679 INFO L87 Difference]: Start difference. First operand 175 states and 279 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:25,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:53:26,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:26,084 INFO L93 Difference]: Finished difference Result 368 states and 585 transitions. [2022-07-11 23:53:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:26,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2022-07-11 23:53:26,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:26,085 INFO L225 Difference]: With dead ends: 368 [2022-07-11 23:53:26,085 INFO L226 Difference]: Without dead ends: 203 [2022-07-11 23:53:26,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:26,087 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 22 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:26,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 457 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-11 23:53:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-11 23:53:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2022-07-11 23:53:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6108108108108108) internal successors, (298), 185 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 298 transitions. [2022-07-11 23:53:26,097 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 298 transitions. Word has length 45 [2022-07-11 23:53:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:26,097 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 298 transitions. [2022-07-11 23:53:26,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:26,097 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 298 transitions. [2022-07-11 23:53:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:53:26,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:26,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:26,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:53:26,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:26,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1347538286, now seen corresponding path program 1 times [2022-07-11 23:53:26,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:26,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336569849] [2022-07-11 23:53:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:26,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:26,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336569849] [2022-07-11 23:53:26,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336569849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:26,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:26,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:26,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146867085] [2022-07-11 23:53:26,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:26,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:26,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:26,202 INFO L87 Difference]: Start difference. First operand 186 states and 298 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) [2022-07-11 23:53:27,531 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 [] [2022-07-11 23:53:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:27,834 INFO L93 Difference]: Finished difference Result 506 states and 815 transitions. [2022-07-11 23:53:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:27,837 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 [2022-07-11 23:53:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:27,838 INFO L225 Difference]: With dead ends: 506 [2022-07-11 23:53:27,838 INFO L226 Difference]: Without dead ends: 341 [2022-07-11 23:53:27,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:27,840 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 141 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:27,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 598 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:53:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-07-11 23:53:27,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 218. [2022-07-11 23:53:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.608294930875576) internal successors, (349), 217 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 349 transitions. [2022-07-11 23:53:27,849 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 349 transitions. Word has length 58 [2022-07-11 23:53:27,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:27,850 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 349 transitions. [2022-07-11 23:53:27,850 INFO L496 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) [2022-07-11 23:53:27,850 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 349 transitions. [2022-07-11 23:53:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 23:53:27,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:27,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:27,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 23:53:27,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1361269889, now seen corresponding path program 1 times [2022-07-11 23:53:27,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:27,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928249250] [2022-07-11 23:53:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:27,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928249250] [2022-07-11 23:53:27,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928249250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:27,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:27,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:27,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925576741] [2022-07-11 23:53:27,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:27,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:27,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:27,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:27,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:27,941 INFO L87 Difference]: Start difference. First operand 218 states and 349 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) [2022-07-11 23:53:29,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:53:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:30,323 INFO L93 Difference]: Finished difference Result 514 states and 818 transitions. [2022-07-11 23:53:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:30,324 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 [2022-07-11 23:53:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:30,325 INFO L225 Difference]: With dead ends: 514 [2022-07-11 23:53:30,325 INFO L226 Difference]: Without dead ends: 317 [2022-07-11 23:53:30,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:30,327 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 146 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:30,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 322 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-11 23:53:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-11 23:53:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 218. [2022-07-11 23:53:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5898617511520738) internal successors, (345), 217 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 345 transitions. [2022-07-11 23:53:30,334 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 345 transitions. Word has length 59 [2022-07-11 23:53:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:30,334 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 345 transitions. [2022-07-11 23:53:30,335 INFO L496 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) [2022-07-11 23:53:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 345 transitions. [2022-07-11 23:53:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 23:53:30,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:30,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:30,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 23:53:30,345 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:30,346 INFO L85 PathProgramCache]: Analyzing trace with hash 525633555, now seen corresponding path program 1 times [2022-07-11 23:53:30,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:30,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027399550] [2022-07-11 23:53:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:30,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:30,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:30,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027399550] [2022-07-11 23:53:30,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027399550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:30,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:30,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:30,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670563567] [2022-07-11 23:53:30,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:30,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:30,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:30,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:30,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:30,420 INFO L87 Difference]: Start difference. First operand 218 states and 345 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) [2022-07-11 23:53:32,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:53:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:32,593 INFO L93 Difference]: Finished difference Result 431 states and 679 transitions. [2022-07-11 23:53:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:32,594 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 [2022-07-11 23:53:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:32,595 INFO L225 Difference]: With dead ends: 431 [2022-07-11 23:53:32,595 INFO L226 Difference]: Without dead ends: 234 [2022-07-11 23:53:32,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:32,596 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 26 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:32,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 461 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:53:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-11 23:53:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 218. [2022-07-11 23:53:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5852534562211982) internal successors, (344), 217 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 344 transitions. [2022-07-11 23:53:32,602 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 344 transitions. Word has length 59 [2022-07-11 23:53:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:32,602 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 344 transitions. [2022-07-11 23:53:32,602 INFO L496 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) [2022-07-11 23:53:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 344 transitions. [2022-07-11 23:53:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 23:53:32,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:32,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:32,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 23:53:32,604 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:32,605 INFO L85 PathProgramCache]: Analyzing trace with hash -326483222, now seen corresponding path program 1 times [2022-07-11 23:53:32,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:32,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303633998] [2022-07-11 23:53:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:32,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:32,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:32,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303633998] [2022-07-11 23:53:32,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303633998] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:32,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:32,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:32,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136068621] [2022-07-11 23:53:32,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:32,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:32,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:32,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:32,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:32,677 INFO L87 Difference]: Start difference. First operand 218 states and 344 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) [2022-07-11 23:53:34,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:53:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:34,571 INFO L93 Difference]: Finished difference Result 430 states and 677 transitions. [2022-07-11 23:53:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:34,571 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 [2022-07-11 23:53:34,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:34,572 INFO L225 Difference]: With dead ends: 430 [2022-07-11 23:53:34,572 INFO L226 Difference]: Without dead ends: 233 [2022-07-11 23:53:34,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:34,573 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 19 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:34,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 463 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-11 23:53:34,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-11 23:53:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 218. [2022-07-11 23:53:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5806451612903225) internal successors, (343), 217 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 343 transitions. [2022-07-11 23:53:34,578 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 343 transitions. Word has length 59 [2022-07-11 23:53:34,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:34,578 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 343 transitions. [2022-07-11 23:53:34,578 INFO L496 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) [2022-07-11 23:53:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 343 transitions. [2022-07-11 23:53:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 23:53:34,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:34,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:34,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 23:53:34,579 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1965263786, now seen corresponding path program 1 times [2022-07-11 23:53:34,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:34,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997606071] [2022-07-11 23:53:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:34,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:34,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:34,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997606071] [2022-07-11 23:53:34,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997606071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:34,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:34,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:34,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336702638] [2022-07-11 23:53:34,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:34,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:34,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:34,657 INFO L87 Difference]: Start difference. First operand 218 states and 343 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) [2022-07-11 23:53:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:35,895 INFO L93 Difference]: Finished difference Result 514 states and 809 transitions. [2022-07-11 23:53:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:35,896 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 [2022-07-11 23:53:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:35,897 INFO L225 Difference]: With dead ends: 514 [2022-07-11 23:53:35,897 INFO L226 Difference]: Without dead ends: 317 [2022-07-11 23:53:35,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:35,917 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 139 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 322 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 [2022-07-11 23:53:35,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 322 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-11 23:53:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-11 23:53:35,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 219. [2022-07-11 23:53:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.5688073394495412) internal successors, (342), 218 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 342 transitions. [2022-07-11 23:53:35,925 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 342 transitions. Word has length 59 [2022-07-11 23:53:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:35,926 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 342 transitions. [2022-07-11 23:53:35,926 INFO L496 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) [2022-07-11 23:53:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 342 transitions. [2022-07-11 23:53:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:53:35,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:35,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:35,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:53:35,928 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1487157225, now seen corresponding path program 1 times [2022-07-11 23:53:35,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:35,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784777511] [2022-07-11 23:53:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:35,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:36,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:36,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784777511] [2022-07-11 23:53:36,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784777511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:36,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:36,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:36,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799145177] [2022-07-11 23:53:36,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:36,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:36,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:36,014 INFO L87 Difference]: Start difference. First operand 219 states and 342 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:36,543 INFO L93 Difference]: Finished difference Result 430 states and 673 transitions. [2022-07-11 23:53:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-11 23:53:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:36,546 INFO L225 Difference]: With dead ends: 430 [2022-07-11 23:53:36,546 INFO L226 Difference]: Without dead ends: 232 [2022-07-11 23:53:36,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:36,550 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 22 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:36,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 467 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:53:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-11 23:53:36,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 219. [2022-07-11 23:53:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.5642201834862386) internal successors, (341), 218 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 341 transitions. [2022-07-11 23:53:36,558 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 341 transitions. Word has length 60 [2022-07-11 23:53:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:36,558 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 341 transitions. [2022-07-11 23:53:36,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 341 transitions. [2022-07-11 23:53:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 23:53:36,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:36,560 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:36,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-11 23:53:36,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:36,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:36,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1805600728, now seen corresponding path program 1 times [2022-07-11 23:53:36,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:36,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974569400] [2022-07-11 23:53:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:36,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:36,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:36,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974569400] [2022-07-11 23:53:36,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974569400] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:36,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:36,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:36,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768973721] [2022-07-11 23:53:36,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:36,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:36,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:36,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:36,689 INFO L87 Difference]: Start difference. First operand 219 states and 341 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:37,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:37,786 INFO L93 Difference]: Finished difference Result 430 states and 672 transitions. [2022-07-11 23:53:37,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:37,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-11 23:53:37,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:37,788 INFO L225 Difference]: With dead ends: 430 [2022-07-11 23:53:37,788 INFO L226 Difference]: Without dead ends: 232 [2022-07-11 23:53:37,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:37,789 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 20 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 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, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:37,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 467 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:53:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-11 23:53:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 219. [2022-07-11 23:53:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.5596330275229358) internal successors, (340), 218 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 340 transitions. [2022-07-11 23:53:37,793 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 340 transitions. Word has length 61 [2022-07-11 23:53:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:37,793 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 340 transitions. [2022-07-11 23:53:37,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 340 transitions. [2022-07-11 23:53:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:53:37,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:37,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:37,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:53:37,794 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:37,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2066644860, now seen corresponding path program 1 times [2022-07-11 23:53:37,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:37,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101452213] [2022-07-11 23:53:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:37,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:37,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:37,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101452213] [2022-07-11 23:53:37,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101452213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:37,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:37,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:37,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140276737] [2022-07-11 23:53:37,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:37,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:37,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:37,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:37,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:37,865 INFO L87 Difference]: Start difference. First operand 219 states and 340 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:38,286 INFO L93 Difference]: Finished difference Result 420 states and 658 transitions. [2022-07-11 23:53:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-11 23:53:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:38,287 INFO L225 Difference]: With dead ends: 420 [2022-07-11 23:53:38,287 INFO L226 Difference]: Without dead ends: 222 [2022-07-11 23:53:38,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:38,288 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 11 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:38,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 481 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:53:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-11 23:53:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2022-07-11 23:53:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.555045871559633) internal successors, (339), 218 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 339 transitions. [2022-07-11 23:53:38,292 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 339 transitions. Word has length 62 [2022-07-11 23:53:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:38,292 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 339 transitions. [2022-07-11 23:53:38,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 339 transitions. [2022-07-11 23:53:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:53:38,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:38,293 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:38,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:53:38,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:38,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:38,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1454771428, now seen corresponding path program 1 times [2022-07-11 23:53:38,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:38,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869061573] [2022-07-11 23:53:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:38,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:38,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869061573] [2022-07-11 23:53:38,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869061573] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:38,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:38,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805381741] [2022-07-11 23:53:38,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:38,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:38,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:38,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:38,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:38,410 INFO L87 Difference]: Start difference. First operand 219 states and 339 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:39,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:39,543 INFO L93 Difference]: Finished difference Result 515 states and 803 transitions. [2022-07-11 23:53:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:39,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-11 23:53:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:39,544 INFO L225 Difference]: With dead ends: 515 [2022-07-11 23:53:39,544 INFO L226 Difference]: Without dead ends: 317 [2022-07-11 23:53:39,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:39,545 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 116 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:39,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 340 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:53:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-11 23:53:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 242. [2022-07-11 23:53:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.5933609958506223) internal successors, (384), 241 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 384 transitions. [2022-07-11 23:53:39,549 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 384 transitions. Word has length 62 [2022-07-11 23:53:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:39,549 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 384 transitions. [2022-07-11 23:53:39,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 384 transitions. [2022-07-11 23:53:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-11 23:53:39,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:39,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:39,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 23:53:39,550 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:39,550 INFO L85 PathProgramCache]: Analyzing trace with hash 413039593, now seen corresponding path program 1 times [2022-07-11 23:53:39,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:39,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951897299] [2022-07-11 23:53:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:39,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:39,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:39,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951897299] [2022-07-11 23:53:39,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951897299] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:39,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:39,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:39,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141580162] [2022-07-11 23:53:39,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:39,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:39,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:39,623 INFO L87 Difference]: Start difference. First operand 242 states and 384 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) [2022-07-11 23:53:40,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:53:41,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:41,147 INFO L93 Difference]: Finished difference Result 614 states and 983 transitions. [2022-07-11 23:53:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:41,148 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 90 [2022-07-11 23:53:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:41,149 INFO L225 Difference]: With dead ends: 614 [2022-07-11 23:53:41,149 INFO L226 Difference]: Without dead ends: 393 [2022-07-11 23:53:41,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:41,150 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 122 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:41,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 332 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-11 23:53:41,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-11 23:53:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 306. [2022-07-11 23:53:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.619672131147541) internal successors, (494), 305 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 494 transitions. [2022-07-11 23:53:41,156 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 494 transitions. Word has length 90 [2022-07-11 23:53:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:41,157 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 494 transitions. [2022-07-11 23:53:41,157 INFO L496 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) [2022-07-11 23:53:41,157 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 494 transitions. [2022-07-11 23:53:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-11 23:53:41,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:41,158 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:41,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-11 23:53:41,158 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:41,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:41,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1796798992, now seen corresponding path program 1 times [2022-07-11 23:53:41,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:41,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301937572] [2022-07-11 23:53:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:41,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:53:41,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:41,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301937572] [2022-07-11 23:53:41,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301937572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:41,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:41,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:41,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304527072] [2022-07-11 23:53:41,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:41,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:41,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:41,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:41,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:41,235 INFO L87 Difference]: Start difference. First operand 306 states and 494 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:42,377 INFO L93 Difference]: Finished difference Result 706 states and 1136 transitions. [2022-07-11 23:53:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:42,378 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 95 [2022-07-11 23:53:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:42,379 INFO L225 Difference]: With dead ends: 706 [2022-07-11 23:53:42,379 INFO L226 Difference]: Without dead ends: 421 [2022-07-11 23:53:42,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:42,381 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 118 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:42,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 320 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:53:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-07-11 23:53:42,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 343. [2022-07-11 23:53:42,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.628654970760234) internal successors, (557), 342 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:42,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 557 transitions. [2022-07-11 23:53:42,389 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 557 transitions. Word has length 95 [2022-07-11 23:53:42,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:42,390 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 557 transitions. [2022-07-11 23:53:42,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:42,390 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 557 transitions. [2022-07-11 23:53:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-11 23:53:42,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:42,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:42,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 23:53:42,391 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:42,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2019754981, now seen corresponding path program 1 times [2022-07-11 23:53:42,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:42,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118311698] [2022-07-11 23:53:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:42,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 23:53:42,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:42,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118311698] [2022-07-11 23:53:42,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118311698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:42,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:42,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:42,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815927409] [2022-07-11 23:53:42,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:42,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:42,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:42,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:42,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:42,479 INFO L87 Difference]: Start difference. First operand 343 states and 557 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:44,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:53:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:44,596 INFO L93 Difference]: Finished difference Result 705 states and 1149 transitions. [2022-07-11 23:53:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:44,596 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 96 [2022-07-11 23:53:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:44,600 INFO L225 Difference]: With dead ends: 705 [2022-07-11 23:53:44,600 INFO L226 Difference]: Without dead ends: 383 [2022-07-11 23:53:44,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:44,602 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 31 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:44,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 485 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-11 23:53:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-07-11 23:53:44,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 365. [2022-07-11 23:53:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.6263736263736264) internal successors, (592), 364 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 592 transitions. [2022-07-11 23:53:44,609 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 592 transitions. Word has length 96 [2022-07-11 23:53:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:44,609 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 592 transitions. [2022-07-11 23:53:44,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 592 transitions. [2022-07-11 23:53:44,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-11 23:53:44,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:44,612 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:44,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-11 23:53:44,613 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:44,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:44,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1199487487, now seen corresponding path program 1 times [2022-07-11 23:53:44,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:44,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767593490] [2022-07-11 23:53:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:44,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:53:44,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:44,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767593490] [2022-07-11 23:53:44,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767593490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:44,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:44,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:44,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077000241] [2022-07-11 23:53:44,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:44,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:44,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:44,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:44,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:44,709 INFO L87 Difference]: Start difference. First operand 365 states and 592 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) [2022-07-11 23:53:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:45,077 INFO L93 Difference]: Finished difference Result 727 states and 1183 transitions. [2022-07-11 23:53:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:45,078 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 110 [2022-07-11 23:53:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:45,079 INFO L225 Difference]: With dead ends: 727 [2022-07-11 23:53:45,079 INFO L226 Difference]: Without dead ends: 383 [2022-07-11 23:53:45,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:45,080 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 40 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:45,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 485 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:53:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-07-11 23:53:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 365. [2022-07-11 23:53:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.6236263736263736) internal successors, (591), 364 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 591 transitions. [2022-07-11 23:53:45,085 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 591 transitions. Word has length 110 [2022-07-11 23:53:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:45,085 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 591 transitions. [2022-07-11 23:53:45,085 INFO L496 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) [2022-07-11 23:53:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 591 transitions. [2022-07-11 23:53:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-11 23:53:45,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:45,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:45,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-11 23:53:45,086 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1657732886, now seen corresponding path program 1 times [2022-07-11 23:53:45,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:45,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946039704] [2022-07-11 23:53:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:45,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:53:45,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:45,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946039704] [2022-07-11 23:53:45,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946039704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:45,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:45,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:45,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404727201] [2022-07-11 23:53:45,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:45,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:45,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:45,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:45,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:45,156 INFO L87 Difference]: Start difference. First operand 365 states and 591 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) [2022-07-11 23:53:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:46,013 INFO L93 Difference]: Finished difference Result 783 states and 1260 transitions. [2022-07-11 23:53:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:46,014 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 110 [2022-07-11 23:53:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:46,015 INFO L225 Difference]: With dead ends: 783 [2022-07-11 23:53:46,015 INFO L226 Difference]: Without dead ends: 439 [2022-07-11 23:53:46,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:46,016 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 137 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:46,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 322 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:53:46,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-11 23:53:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 365. [2022-07-11 23:53:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.6071428571428572) internal successors, (585), 364 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 585 transitions. [2022-07-11 23:53:46,023 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 585 transitions. Word has length 110 [2022-07-11 23:53:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:46,023 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 585 transitions. [2022-07-11 23:53:46,023 INFO L496 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) [2022-07-11 23:53:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 585 transitions. [2022-07-11 23:53:46,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-11 23:53:46,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:46,024 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:46,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-11 23:53:46,025 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:46,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1035654471, now seen corresponding path program 1 times [2022-07-11 23:53:46,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:46,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396113460] [2022-07-11 23:53:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:46,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:53:46,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396113460] [2022-07-11 23:53:46,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396113460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:46,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:46,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:46,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546782258] [2022-07-11 23:53:46,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:46,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:46,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:46,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:46,104 INFO L87 Difference]: Start difference. First operand 365 states and 585 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:47,658 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 [] [2022-07-11 23:53:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:47,925 INFO L93 Difference]: Finished difference Result 783 states and 1248 transitions. [2022-07-11 23:53:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:47,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-11 23:53:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:47,928 INFO L225 Difference]: With dead ends: 783 [2022-07-11 23:53:47,928 INFO L226 Difference]: Without dead ends: 439 [2022-07-11 23:53:47,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:47,929 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 141 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 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, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:47,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 322 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-11 23:53:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-11 23:53:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 365. [2022-07-11 23:53:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.5879120879120878) internal successors, (578), 364 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 578 transitions. [2022-07-11 23:53:47,934 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 578 transitions. Word has length 111 [2022-07-11 23:53:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:47,934 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 578 transitions. [2022-07-11 23:53:47,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 578 transitions. [2022-07-11 23:53:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-11 23:53:47,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:47,938 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:47,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-11 23:53:47,939 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:47,939 INFO L85 PathProgramCache]: Analyzing trace with hash 44793668, now seen corresponding path program 1 times [2022-07-11 23:53:47,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:47,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077532257] [2022-07-11 23:53:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:47,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:53:48,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:48,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077532257] [2022-07-11 23:53:48,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077532257] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:48,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:48,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:48,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438314076] [2022-07-11 23:53:48,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:48,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:48,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:48,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:48,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:48,017 INFO L87 Difference]: Start difference. First operand 365 states and 578 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:49,148 INFO L93 Difference]: Finished difference Result 783 states and 1234 transitions. [2022-07-11 23:53:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:49,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-07-11 23:53:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:49,150 INFO L225 Difference]: With dead ends: 783 [2022-07-11 23:53:49,150 INFO L226 Difference]: Without dead ends: 439 [2022-07-11 23:53:49,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:49,151 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 139 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 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, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:49,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 322 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:53:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-11 23:53:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 365. [2022-07-11 23:53:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.5686813186813187) internal successors, (571), 364 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 571 transitions. [2022-07-11 23:53:49,157 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 571 transitions. Word has length 112 [2022-07-11 23:53:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:49,157 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 571 transitions. [2022-07-11 23:53:49,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:49,157 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 571 transitions. [2022-07-11 23:53:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-11 23:53:49,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:49,158 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:49,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-11 23:53:49,159 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:49,159 INFO L85 PathProgramCache]: Analyzing trace with hash 829319710, now seen corresponding path program 1 times [2022-07-11 23:53:49,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:49,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684966822] [2022-07-11 23:53:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:49,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:53:49,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:49,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684966822] [2022-07-11 23:53:49,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684966822] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:49,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:49,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:49,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981304378] [2022-07-11 23:53:49,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:49,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:49,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:49,265 INFO L87 Difference]: Start difference. First operand 365 states and 571 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:50,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:53:50,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:50,656 INFO L93 Difference]: Finished difference Result 783 states and 1220 transitions. [2022-07-11 23:53:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:50,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-11 23:53:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:50,659 INFO L225 Difference]: With dead ends: 783 [2022-07-11 23:53:50,659 INFO L226 Difference]: Without dead ends: 439 [2022-07-11 23:53:50,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:50,660 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 137 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:50,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 322 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-11 23:53:50,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-11 23:53:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 365. [2022-07-11 23:53:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.5494505494505495) internal successors, (564), 364 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 564 transitions. [2022-07-11 23:53:50,666 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 564 transitions. Word has length 113 [2022-07-11 23:53:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:50,666 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 564 transitions. [2022-07-11 23:53:50,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 564 transitions. [2022-07-11 23:53:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-11 23:53:50,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:50,668 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:50,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-11 23:53:50,668 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:50,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:50,668 INFO L85 PathProgramCache]: Analyzing trace with hash 198816901, now seen corresponding path program 1 times [2022-07-11 23:53:50,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:50,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081910546] [2022-07-11 23:53:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:50,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:53:50,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:50,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081910546] [2022-07-11 23:53:50,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081910546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:50,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:50,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:50,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009535079] [2022-07-11 23:53:50,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:50,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:50,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:50,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:50,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:50,784 INFO L87 Difference]: Start difference. First operand 365 states and 564 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:52,201 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:53:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:52,427 INFO L93 Difference]: Finished difference Result 799 states and 1236 transitions. [2022-07-11 23:53:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:52,427 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 [2022-07-11 23:53:52,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:52,429 INFO L225 Difference]: With dead ends: 799 [2022-07-11 23:53:52,429 INFO L226 Difference]: Without dead ends: 455 [2022-07-11 23:53:52,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:52,429 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 74 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:52,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 453 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:53:52,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-07-11 23:53:52,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 405. [2022-07-11 23:53:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.551980198019802) internal successors, (627), 404 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:52,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 627 transitions. [2022-07-11 23:53:52,436 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 627 transitions. Word has length 118 [2022-07-11 23:53:52,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:52,436 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 627 transitions. [2022-07-11 23:53:52,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:52,436 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 627 transitions. [2022-07-11 23:53:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-11 23:53:52,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:52,437 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:52,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-11 23:53:52,438 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:52,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:52,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1932921351, now seen corresponding path program 1 times [2022-07-11 23:53:52,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:52,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947695794] [2022-07-11 23:53:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:52,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:53:52,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:52,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947695794] [2022-07-11 23:53:52,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947695794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:52,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:52,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:52,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698074589] [2022-07-11 23:53:52,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:52,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:52,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:52,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:52,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:52,513 INFO L87 Difference]: Start difference. First operand 405 states and 627 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:53,516 INFO L93 Difference]: Finished difference Result 834 states and 1293 transitions. [2022-07-11 23:53:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:53,516 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 118 [2022-07-11 23:53:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:53,518 INFO L225 Difference]: With dead ends: 834 [2022-07-11 23:53:53,518 INFO L226 Difference]: Without dead ends: 450 [2022-07-11 23:53:53,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:53,519 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 33 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:53,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 573 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 23:53:53,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-07-11 23:53:53,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 429. [2022-07-11 23:53:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.5467289719626167) internal successors, (662), 428 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) [2022-07-11 23:53:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 662 transitions. [2022-07-11 23:53:53,528 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 662 transitions. Word has length 118 [2022-07-11 23:53:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:53,528 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 662 transitions. [2022-07-11 23:53:53,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:53,529 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 662 transitions. [2022-07-11 23:53:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-11 23:53:53,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:53,530 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:53,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-11 23:53:53,530 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:53,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2071638908, now seen corresponding path program 1 times [2022-07-11 23:53:53,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:53,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937102972] [2022-07-11 23:53:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:53,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:53:53,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:53,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937102972] [2022-07-11 23:53:53,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937102972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:53,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:53,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:53,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749071345] [2022-07-11 23:53:53,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:53,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:53,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:53,641 INFO L87 Difference]: Start difference. First operand 429 states and 662 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:54,245 INFO L93 Difference]: Finished difference Result 951 states and 1466 transitions. [2022-07-11 23:53:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:54,247 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 [2022-07-11 23:53:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:54,249 INFO L225 Difference]: With dead ends: 951 [2022-07-11 23:53:54,249 INFO L226 Difference]: Without dead ends: 543 [2022-07-11 23:53:54,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:54,250 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 107 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:54,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 323 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:53:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-07-11 23:53:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 472. [2022-07-11 23:53:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.5520169851380043) internal successors, (731), 471 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 731 transitions. [2022-07-11 23:53:54,256 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 731 transitions. Word has length 126 [2022-07-11 23:53:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:54,257 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 731 transitions. [2022-07-11 23:53:54,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 731 transitions. [2022-07-11 23:53:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-11 23:53:54,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:54,258 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:54,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-11 23:53:54,258 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1967179869, now seen corresponding path program 1 times [2022-07-11 23:53:54,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:54,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808245396] [2022-07-11 23:53:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:54,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:53:54,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:54,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808245396] [2022-07-11 23:53:54,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808245396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:54,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:54,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:54,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109913177] [2022-07-11 23:53:54,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:54,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:54,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:54,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:54,336 INFO L87 Difference]: Start difference. First operand 472 states and 731 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) [2022-07-11 23:53:55,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:55,183 INFO L93 Difference]: Finished difference Result 997 states and 1540 transitions. [2022-07-11 23:53:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:55,184 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 [2022-07-11 23:53:55,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:55,185 INFO L225 Difference]: With dead ends: 997 [2022-07-11 23:53:55,185 INFO L226 Difference]: Without dead ends: 544 [2022-07-11 23:53:55,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:55,186 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 108 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:55,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 322 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:53:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-07-11 23:53:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 474. [2022-07-11 23:53:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.5517970401691332) internal successors, (734), 473 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 734 transitions. [2022-07-11 23:53:55,193 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 734 transitions. Word has length 127 [2022-07-11 23:53:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:55,193 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 734 transitions. [2022-07-11 23:53:55,193 INFO L496 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) [2022-07-11 23:53:55,193 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 734 transitions. [2022-07-11 23:53:55,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-11 23:53:55,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:55,194 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:55,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-11 23:53:55,194 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1678544663, now seen corresponding path program 1 times [2022-07-11 23:53:55,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:55,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069601700] [2022-07-11 23:53:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:55,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 23:53:55,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:55,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069601700] [2022-07-11 23:53:55,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069601700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:55,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:55,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:53:55,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449395982] [2022-07-11 23:53:55,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:55,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:53:55,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:53:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:55,274 INFO L87 Difference]: Start difference. First operand 474 states and 734 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:56,641 INFO L93 Difference]: Finished difference Result 937 states and 1456 transitions. [2022-07-11 23:53:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:53:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-07-11 23:53:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:56,643 INFO L225 Difference]: With dead ends: 937 [2022-07-11 23:53:56,643 INFO L226 Difference]: Without dead ends: 484 [2022-07-11 23:53:56,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:53:56,644 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 146 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:56,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 344 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-11 23:53:56,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-07-11 23:53:56,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 483. [2022-07-11 23:53:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.545643153526971) internal successors, (745), 482 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:56,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 745 transitions. [2022-07-11 23:53:56,679 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 745 transitions. Word has length 132 [2022-07-11 23:53:56,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:56,679 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 745 transitions. [2022-07-11 23:53:56,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 745 transitions. [2022-07-11 23:53:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-11 23:53:56,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:56,681 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:56,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-11 23:53:56,681 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1081930242, now seen corresponding path program 1 times [2022-07-11 23:53:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:56,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214936613] [2022-07-11 23:53:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:53:56,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:56,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214936613] [2022-07-11 23:53:56,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214936613] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:56,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:56,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:56,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425130355] [2022-07-11 23:53:56,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:56,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:56,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:56,759 INFO L87 Difference]: Start difference. First operand 483 states and 745 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:58,191 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 [] [2022-07-11 23:53:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:58,443 INFO L93 Difference]: Finished difference Result 1005 states and 1548 transitions. [2022-07-11 23:53:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:58,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 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 133 [2022-07-11 23:53:58,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:58,445 INFO L225 Difference]: With dead ends: 1005 [2022-07-11 23:53:58,445 INFO L226 Difference]: Without dead ends: 543 [2022-07-11 23:53:58,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:58,446 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 130 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 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, 1.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:58,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 364 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-11 23:53:58,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-07-11 23:53:58,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 483. [2022-07-11 23:53:58,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.5269709543568464) internal successors, (736), 482 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 736 transitions. [2022-07-11 23:53:58,454 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 736 transitions. Word has length 133 [2022-07-11 23:53:58,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:58,454 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 736 transitions. [2022-07-11 23:53:58,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:58,454 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 736 transitions. [2022-07-11 23:53:58,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-11 23:53:58,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:58,456 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:58,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-11 23:53:58,456 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:58,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:58,456 INFO L85 PathProgramCache]: Analyzing trace with hash 923128465, now seen corresponding path program 1 times [2022-07-11 23:53:58,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:58,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899011253] [2022-07-11 23:53:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:58,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:53:58,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:58,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899011253] [2022-07-11 23:53:58,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899011253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:58,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:58,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:58,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074073991] [2022-07-11 23:53:58,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:58,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:58,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:58,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:58,532 INFO L87 Difference]: Start difference. First operand 483 states and 736 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) [2022-07-11 23:53:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:53:59,577 INFO L93 Difference]: Finished difference Result 979 states and 1493 transitions. [2022-07-11 23:53:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:53:59,577 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 [2022-07-11 23:53:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:53:59,578 INFO L225 Difference]: With dead ends: 979 [2022-07-11 23:53:59,579 INFO L226 Difference]: Without dead ends: 517 [2022-07-11 23:53:59,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:53:59,579 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 64 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:53:59,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 473 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 23:53:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-07-11 23:53:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 483. [2022-07-11 23:53:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.5248962655601659) internal successors, (735), 482 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:53:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 735 transitions. [2022-07-11 23:53:59,587 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 735 transitions. Word has length 139 [2022-07-11 23:53:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:53:59,587 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 735 transitions. [2022-07-11 23:53:59,587 INFO L496 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) [2022-07-11 23:53:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 735 transitions. [2022-07-11 23:53:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-11 23:53:59,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:53:59,590 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:53:59,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-11 23:53:59,591 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:53:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:53:59,591 INFO L85 PathProgramCache]: Analyzing trace with hash 178755555, now seen corresponding path program 1 times [2022-07-11 23:53:59,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:53:59,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507141983] [2022-07-11 23:53:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:53:59,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:53:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:53:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:53:59,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:53:59,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507141983] [2022-07-11 23:53:59,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507141983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:53:59,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:53:59,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:53:59,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874561752] [2022-07-11 23:53:59,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:53:59,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:53:59,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:53:59,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:53:59,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:53:59,748 INFO L87 Difference]: Start difference. First operand 483 states and 735 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) [2022-07-11 23:54:00,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:00,130 INFO L93 Difference]: Finished difference Result 1005 states and 1528 transitions. [2022-07-11 23:54:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:00,130 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 140 [2022-07-11 23:54:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:00,132 INFO L225 Difference]: With dead ends: 1005 [2022-07-11 23:54:00,132 INFO L226 Difference]: Without dead ends: 543 [2022-07-11 23:54:00,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:00,133 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 117 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:00,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 374 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-07-11 23:54:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 483. [2022-07-11 23:54:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.5103734439834025) internal successors, (728), 482 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 728 transitions. [2022-07-11 23:54:00,142 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 728 transitions. Word has length 140 [2022-07-11 23:54:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:00,143 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 728 transitions. [2022-07-11 23:54:00,143 INFO L496 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) [2022-07-11 23:54:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 728 transitions. [2022-07-11 23:54:00,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-11 23:54:00,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:00,144 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:00,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-11 23:54:00,144 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:00,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1310833163, now seen corresponding path program 1 times [2022-07-11 23:54:00,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:00,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559894394] [2022-07-11 23:54:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:00,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:54:00,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:00,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559894394] [2022-07-11 23:54:00,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559894394] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:00,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:00,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422915471] [2022-07-11 23:54:00,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:00,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:00,215 INFO L87 Difference]: Start difference. First operand 483 states and 728 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) [2022-07-11 23:54:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:00,763 INFO L93 Difference]: Finished difference Result 977 states and 1475 transitions. [2022-07-11 23:54:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:00,763 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 [2022-07-11 23:54:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:00,764 INFO L225 Difference]: With dead ends: 977 [2022-07-11 23:54:00,765 INFO L226 Difference]: Without dead ends: 515 [2022-07-11 23:54:00,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:00,765 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 60 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:00,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 485 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-07-11 23:54:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 483. [2022-07-11 23:54:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.508298755186722) internal successors, (727), 482 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 727 transitions. [2022-07-11 23:54:00,773 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 727 transitions. Word has length 140 [2022-07-11 23:54:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:00,773 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 727 transitions. [2022-07-11 23:54:00,773 INFO L496 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) [2022-07-11 23:54:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 727 transitions. [2022-07-11 23:54:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-11 23:54:00,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:00,774 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:00,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-11 23:54:00,774 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:00,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1779826661, now seen corresponding path program 1 times [2022-07-11 23:54:00,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:00,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286531140] [2022-07-11 23:54:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:00,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 23:54:00,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:00,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286531140] [2022-07-11 23:54:00,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286531140] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:00,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:00,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:00,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897036748] [2022-07-11 23:54:00,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:00,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:00,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:00,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:00,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:00,869 INFO L87 Difference]: Start difference. First operand 483 states and 727 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) [2022-07-11 23:54:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:01,481 INFO L93 Difference]: Finished difference Result 984 states and 1485 transitions. [2022-07-11 23:54:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:01,482 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 140 [2022-07-11 23:54:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:01,483 INFO L225 Difference]: With dead ends: 984 [2022-07-11 23:54:01,483 INFO L226 Difference]: Without dead ends: 522 [2022-07-11 23:54:01,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:01,496 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 27 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:01,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 561 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:54:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-07-11 23:54:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 509. [2022-07-11 23:54:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.5039370078740157) internal successors, (764), 508 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 764 transitions. [2022-07-11 23:54:01,522 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 764 transitions. Word has length 140 [2022-07-11 23:54:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:01,522 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 764 transitions. [2022-07-11 23:54:01,523 INFO L496 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) [2022-07-11 23:54:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 764 transitions. [2022-07-11 23:54:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-11 23:54:01,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:01,524 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:01,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-11 23:54:01,524 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:01,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2138352260, now seen corresponding path program 1 times [2022-07-11 23:54:01,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:01,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125242278] [2022-07-11 23:54:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:01,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:54:01,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:01,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125242278] [2022-07-11 23:54:01,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125242278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:01,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:01,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:01,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095330047] [2022-07-11 23:54:01,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:01,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:01,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:01,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:01,631 INFO L87 Difference]: Start difference. First operand 509 states and 764 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:02,393 INFO L93 Difference]: Finished difference Result 1099 states and 1651 transitions. [2022-07-11 23:54:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-11 23:54:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:02,395 INFO L225 Difference]: With dead ends: 1099 [2022-07-11 23:54:02,395 INFO L226 Difference]: Without dead ends: 611 [2022-07-11 23:54:02,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:02,396 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 113 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:02,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 364 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:54:02,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-07-11 23:54:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 537. [2022-07-11 23:54:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.4906716417910448) internal successors, (799), 536 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 799 transitions. [2022-07-11 23:54:02,405 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 799 transitions. Word has length 142 [2022-07-11 23:54:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:02,405 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 799 transitions. [2022-07-11 23:54:02,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 799 transitions. [2022-07-11 23:54:02,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-11 23:54:02,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:02,407 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:02,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-11 23:54:02,407 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:02,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1346533418, now seen corresponding path program 1 times [2022-07-11 23:54:02,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:02,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668592304] [2022-07-11 23:54:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:02,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:54:02,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:02,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668592304] [2022-07-11 23:54:02,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668592304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:02,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:02,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:02,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569037894] [2022-07-11 23:54:02,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:02,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:02,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:02,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:02,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:02,490 INFO L87 Difference]: Start difference. First operand 537 states and 799 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) [2022-07-11 23:54:04,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:04,303 INFO L93 Difference]: Finished difference Result 1077 states and 1604 transitions. [2022-07-11 23:54:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:04,303 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 [2022-07-11 23:54:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:04,305 INFO L225 Difference]: With dead ends: 1077 [2022-07-11 23:54:04,305 INFO L226 Difference]: Without dead ends: 561 [2022-07-11 23:54:04,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:04,306 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 51 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:04,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 503 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-11 23:54:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-07-11 23:54:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 537. [2022-07-11 23:54:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.4888059701492538) internal successors, (798), 536 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:04,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 798 transitions. [2022-07-11 23:54:04,313 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 798 transitions. Word has length 143 [2022-07-11 23:54:04,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:04,313 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 798 transitions. [2022-07-11 23:54:04,313 INFO L496 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) [2022-07-11 23:54:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 798 transitions. [2022-07-11 23:54:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-11 23:54:04,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:04,314 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:04,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-11 23:54:04,314 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:04,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:04,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1625865976, now seen corresponding path program 1 times [2022-07-11 23:54:04,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:04,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303029508] [2022-07-11 23:54:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:04,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:54:04,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:04,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303029508] [2022-07-11 23:54:04,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303029508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:04,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:04,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:04,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891413128] [2022-07-11 23:54:04,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:04,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:04,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:04,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:04,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:04,406 INFO L87 Difference]: Start difference. First operand 537 states and 798 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) [2022-07-11 23:54:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:04,831 INFO L93 Difference]: Finished difference Result 1077 states and 1602 transitions. [2022-07-11 23:54:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:04,832 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 146 [2022-07-11 23:54:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:04,833 INFO L225 Difference]: With dead ends: 1077 [2022-07-11 23:54:04,833 INFO L226 Difference]: Without dead ends: 561 [2022-07-11 23:54:04,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:04,834 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 53 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:04,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 503 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:04,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-07-11 23:54:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 537. [2022-07-11 23:54:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.4869402985074627) internal successors, (797), 536 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 797 transitions. [2022-07-11 23:54:04,842 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 797 transitions. Word has length 146 [2022-07-11 23:54:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:04,842 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 797 transitions. [2022-07-11 23:54:04,842 INFO L496 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) [2022-07-11 23:54:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 797 transitions. [2022-07-11 23:54:04,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-11 23:54:04,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:04,844 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:04,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-11 23:54:04,844 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:04,845 INFO L85 PathProgramCache]: Analyzing trace with hash -610410242, now seen corresponding path program 1 times [2022-07-11 23:54:04,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:04,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806729031] [2022-07-11 23:54:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:04,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:54:04,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:04,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806729031] [2022-07-11 23:54:04,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806729031] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:04,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:04,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:04,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814464014] [2022-07-11 23:54:04,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:04,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:04,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:04,925 INFO L87 Difference]: Start difference. First operand 537 states and 797 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:05,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:06,207 INFO L93 Difference]: Finished difference Result 1113 states and 1652 transitions. [2022-07-11 23:54:06,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:06,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-07-11 23:54:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:06,209 INFO L225 Difference]: With dead ends: 1113 [2022-07-11 23:54:06,209 INFO L226 Difference]: Without dead ends: 597 [2022-07-11 23:54:06,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:06,210 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 114 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:06,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 344 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-11 23:54:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-07-11 23:54:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 537. [2022-07-11 23:54:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.4720149253731343) internal successors, (789), 536 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 789 transitions. [2022-07-11 23:54:06,219 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 789 transitions. Word has length 147 [2022-07-11 23:54:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:06,219 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 789 transitions. [2022-07-11 23:54:06,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 789 transitions. [2022-07-11 23:54:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-11 23:54:06,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:06,221 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:06,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-11 23:54:06,221 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash 975125816, now seen corresponding path program 1 times [2022-07-11 23:54:06,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:06,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141090046] [2022-07-11 23:54:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:06,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-11 23:54:06,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:06,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141090046] [2022-07-11 23:54:06,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141090046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:06,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:06,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:06,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423873601] [2022-07-11 23:54:06,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:06,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:06,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:06,299 INFO L87 Difference]: Start difference. First operand 537 states and 789 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:07,114 INFO L93 Difference]: Finished difference Result 1075 states and 1581 transitions. [2022-07-11 23:54:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:07,115 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 [2022-07-11 23:54:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:07,116 INFO L225 Difference]: With dead ends: 1075 [2022-07-11 23:54:07,116 INFO L226 Difference]: Without dead ends: 559 [2022-07-11 23:54:07,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:07,117 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 41 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:07,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 509 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:54:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-07-11 23:54:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 537. [2022-07-11 23:54:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.4701492537313432) internal successors, (788), 536 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 788 transitions. [2022-07-11 23:54:07,126 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 788 transitions. Word has length 149 [2022-07-11 23:54:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:07,126 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 788 transitions. [2022-07-11 23:54:07,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 788 transitions. [2022-07-11 23:54:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-11 23:54:07,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:07,128 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:07,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-11 23:54:07,128 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:07,128 INFO L85 PathProgramCache]: Analyzing trace with hash -6678238, now seen corresponding path program 1 times [2022-07-11 23:54:07,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:07,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496942350] [2022-07-11 23:54:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:07,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:54:07,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:07,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496942350] [2022-07-11 23:54:07,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496942350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:07,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:07,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:07,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850045096] [2022-07-11 23:54:07,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:07,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:07,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:07,229 INFO L87 Difference]: Start difference. First operand 537 states and 788 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) [2022-07-11 23:54:08,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:08,258 INFO L93 Difference]: Finished difference Result 1155 states and 1698 transitions. [2022-07-11 23:54:08,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:08,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-07-11 23:54:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:08,260 INFO L225 Difference]: With dead ends: 1155 [2022-07-11 23:54:08,260 INFO L226 Difference]: Without dead ends: 639 [2022-07-11 23:54:08,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:08,261 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 107 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:08,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 344 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 23:54:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-11 23:54:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 570. [2022-07-11 23:54:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.4639718804920914) internal successors, (833), 569 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 833 transitions. [2022-07-11 23:54:08,270 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 833 transitions. Word has length 149 [2022-07-11 23:54:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:08,271 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 833 transitions. [2022-07-11 23:54:08,271 INFO L496 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) [2022-07-11 23:54:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 833 transitions. [2022-07-11 23:54:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-11 23:54:08,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:08,272 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:08,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-11 23:54:08,272 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:08,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:08,273 INFO L85 PathProgramCache]: Analyzing trace with hash 672787457, now seen corresponding path program 1 times [2022-07-11 23:54:08,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:08,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054639960] [2022-07-11 23:54:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:08,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:54:08,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054639960] [2022-07-11 23:54:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054639960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:08,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:08,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34964512] [2022-07-11 23:54:08,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:08,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:08,351 INFO L87 Difference]: Start difference. First operand 570 states and 833 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:09,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:09,942 INFO L93 Difference]: Finished difference Result 1179 states and 1724 transitions. [2022-07-11 23:54:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:09,942 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 150 [2022-07-11 23:54:09,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:09,944 INFO L225 Difference]: With dead ends: 1179 [2022-07-11 23:54:09,944 INFO L226 Difference]: Without dead ends: 630 [2022-07-11 23:54:09,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:09,945 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 106 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:09,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 344 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:54:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-07-11 23:54:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 570. [2022-07-11 23:54:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.4551845342706502) internal successors, (828), 569 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:09,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 828 transitions. [2022-07-11 23:54:09,958 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 828 transitions. Word has length 150 [2022-07-11 23:54:09,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:09,958 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 828 transitions. [2022-07-11 23:54:09,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:09,958 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 828 transitions. [2022-07-11 23:54:09,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-11 23:54:09,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:09,959 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:09,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-11 23:54:09,960 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:09,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1350973257, now seen corresponding path program 1 times [2022-07-11 23:54:09,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:09,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600307681] [2022-07-11 23:54:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:09,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-11 23:54:10,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:10,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600307681] [2022-07-11 23:54:10,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600307681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:10,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:10,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:10,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913689943] [2022-07-11 23:54:10,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:10,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:10,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:10,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:10,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:10,081 INFO L87 Difference]: Start difference. First operand 570 states and 828 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:10,765 INFO L93 Difference]: Finished difference Result 1179 states and 1714 transitions. [2022-07-11 23:54:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:10,765 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 [2022-07-11 23:54:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:10,767 INFO L225 Difference]: With dead ends: 1179 [2022-07-11 23:54:10,767 INFO L226 Difference]: Without dead ends: 630 [2022-07-11 23:54:10,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:10,768 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 103 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:10,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 344 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:54:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-07-11 23:54:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 570. [2022-07-11 23:54:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.4463971880492092) internal successors, (823), 569 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 823 transitions. [2022-07-11 23:54:10,777 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 823 transitions. Word has length 150 [2022-07-11 23:54:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:10,777 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 823 transitions. [2022-07-11 23:54:10,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 823 transitions. [2022-07-11 23:54:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-11 23:54:10,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:10,778 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:10,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-11 23:54:10,779 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1658435944, now seen corresponding path program 1 times [2022-07-11 23:54:10,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:10,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036148911] [2022-07-11 23:54:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:10,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-11 23:54:10,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:10,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036148911] [2022-07-11 23:54:10,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036148911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:10,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:10,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:10,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501684024] [2022-07-11 23:54:10,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:10,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:10,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:10,883 INFO L87 Difference]: Start difference. First operand 570 states and 823 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:12,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:12,529 INFO L93 Difference]: Finished difference Result 1179 states and 1704 transitions. [2022-07-11 23:54:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:12,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 159 [2022-07-11 23:54:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:12,531 INFO L225 Difference]: With dead ends: 1179 [2022-07-11 23:54:12,531 INFO L226 Difference]: Without dead ends: 630 [2022-07-11 23:54:12,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:12,532 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 99 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:12,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 344 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:54:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-07-11 23:54:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 567. [2022-07-11 23:54:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 1.4434628975265018) internal successors, (817), 566 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 817 transitions. [2022-07-11 23:54:12,542 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 817 transitions. Word has length 159 [2022-07-11 23:54:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:12,542 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 817 transitions. [2022-07-11 23:54:12,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 817 transitions. [2022-07-11 23:54:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-11 23:54:12,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:12,543 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:12,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-11 23:54:12,544 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:12,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:12,544 INFO L85 PathProgramCache]: Analyzing trace with hash 153715343, now seen corresponding path program 1 times [2022-07-11 23:54:12,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:12,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772958243] [2022-07-11 23:54:12,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:12,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-11 23:54:12,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:12,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772958243] [2022-07-11 23:54:12,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772958243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:12,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:12,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:12,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049285119] [2022-07-11 23:54:12,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:12,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:12,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:12,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:12,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:12,668 INFO L87 Difference]: Start difference. First operand 567 states and 817 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) [2022-07-11 23:54:12,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:12,701 INFO L93 Difference]: Finished difference Result 1652 states and 2393 transitions. [2022-07-11 23:54:12,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:12,701 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 [2022-07-11 23:54:12,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:12,704 INFO L225 Difference]: With dead ends: 1652 [2022-07-11 23:54:12,704 INFO L226 Difference]: Without dead ends: 1106 [2022-07-11 23:54:12,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:12,705 INFO L413 NwaCegarLoop]: 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 [2022-07-11 23:54:12,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 559 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:12,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-07-11 23:54:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1106. [2022-07-11 23:54:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1105 states have (on average 1.4425339366515837) internal successors, (1594), 1105 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1594 transitions. [2022-07-11 23:54:12,724 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1594 transitions. Word has length 167 [2022-07-11 23:54:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:12,724 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 1594 transitions. [2022-07-11 23:54:12,724 INFO L496 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) [2022-07-11 23:54:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1594 transitions. [2022-07-11 23:54:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-11 23:54:12,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:12,726 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:12,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-11 23:54:12,726 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:12,726 INFO L85 PathProgramCache]: Analyzing trace with hash 493144206, now seen corresponding path program 1 times [2022-07-11 23:54:12,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:12,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903006881] [2022-07-11 23:54:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:12,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-11 23:54:12,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:12,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903006881] [2022-07-11 23:54:12,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903006881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:12,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:12,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:12,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295200234] [2022-07-11 23:54:12,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:12,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:12,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:12,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:12,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:12,813 INFO L87 Difference]: Start difference. First operand 1106 states and 1594 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) [2022-07-11 23:54:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:12,852 INFO L93 Difference]: Finished difference Result 2698 states and 3899 transitions. [2022-07-11 23:54:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:12,852 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 [2022-07-11 23:54:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:12,856 INFO L225 Difference]: With dead ends: 2698 [2022-07-11 23:54:12,856 INFO L226 Difference]: Without dead ends: 1613 [2022-07-11 23:54:12,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:12,857 INFO L413 NwaCegarLoop]: 303 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, 492 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 [2022-07-11 23:54:12,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 492 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2022-07-11 23:54:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1613. [2022-07-11 23:54:12,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 1.4410669975186103) internal successors, (2323), 1612 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2323 transitions. [2022-07-11 23:54:12,883 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2323 transitions. Word has length 168 [2022-07-11 23:54:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:12,883 INFO L495 AbstractCegarLoop]: Abstraction has 1613 states and 2323 transitions. [2022-07-11 23:54:12,883 INFO L496 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) [2022-07-11 23:54:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2323 transitions. [2022-07-11 23:54:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-11 23:54:12,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:12,885 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:12,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-11 23:54:12,886 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:12,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1716174966, now seen corresponding path program 1 times [2022-07-11 23:54:12,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:12,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21037561] [2022-07-11 23:54:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:12,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 23:54:12,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:12,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21037561] [2022-07-11 23:54:12,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21037561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:12,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:12,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:12,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707827971] [2022-07-11 23:54:12,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:12,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:12,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:12,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:12,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:12,999 INFO L87 Difference]: Start difference. First operand 1613 states and 2323 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) [2022-07-11 23:54:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:13,043 INFO L93 Difference]: Finished difference Result 3703 states and 5347 transitions. [2022-07-11 23:54:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:13,044 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 [2022-07-11 23:54:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:13,049 INFO L225 Difference]: With dead ends: 3703 [2022-07-11 23:54:13,049 INFO L226 Difference]: Without dead ends: 2111 [2022-07-11 23:54:13,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:13,051 INFO L413 NwaCegarLoop]: 319 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, 508 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 [2022-07-11 23:54:13,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 508 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2022-07-11 23:54:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 2111. [2022-07-11 23:54:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 1.4417061611374407) internal successors, (3042), 2110 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3042 transitions. [2022-07-11 23:54:13,084 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3042 transitions. Word has length 169 [2022-07-11 23:54:13,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:13,084 INFO L495 AbstractCegarLoop]: Abstraction has 2111 states and 3042 transitions. [2022-07-11 23:54:13,085 INFO L496 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) [2022-07-11 23:54:13,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3042 transitions. [2022-07-11 23:54:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-11 23:54:13,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:13,087 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:13,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-11 23:54:13,088 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1994020680, now seen corresponding path program 1 times [2022-07-11 23:54:13,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:13,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965717343] [2022-07-11 23:54:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:13,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-11 23:54:13,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:13,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965717343] [2022-07-11 23:54:13,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965717343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:13,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:13,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:13,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587750351] [2022-07-11 23:54:13,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:13,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:13,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:13,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:13,166 INFO L87 Difference]: Start difference. First operand 2111 states and 3042 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) [2022-07-11 23:54:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:13,206 INFO L93 Difference]: Finished difference Result 4228 states and 6096 transitions. [2022-07-11 23:54:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:13,206 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 [2022-07-11 23:54:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:13,211 INFO L225 Difference]: With dead ends: 4228 [2022-07-11 23:54:13,211 INFO L226 Difference]: Without dead ends: 2138 [2022-07-11 23:54:13,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:13,213 INFO L413 NwaCegarLoop]: 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 [2022-07-11 23:54:13,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 406 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:13,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2022-07-11 23:54:13,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 2138. [2022-07-11 23:54:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.439868975198877) internal successors, (3077), 2137 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3077 transitions. [2022-07-11 23:54:13,247 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3077 transitions. Word has length 169 [2022-07-11 23:54:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:13,247 INFO L495 AbstractCegarLoop]: Abstraction has 2138 states and 3077 transitions. [2022-07-11 23:54:13,247 INFO L496 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) [2022-07-11 23:54:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3077 transitions. [2022-07-11 23:54:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-11 23:54:13,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:13,250 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:13,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-11 23:54:13,250 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1729373190, now seen corresponding path program 1 times [2022-07-11 23:54:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:13,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883788037] [2022-07-11 23:54:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-11 23:54:13,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:13,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883788037] [2022-07-11 23:54:13,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883788037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:13,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:13,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:13,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189318926] [2022-07-11 23:54:13,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:13,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:13,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:13,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:13,336 INFO L87 Difference]: Start difference. First operand 2138 states and 3077 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) [2022-07-11 23:54:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:13,377 INFO L93 Difference]: Finished difference Result 4257 states and 6132 transitions. [2022-07-11 23:54:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:13,377 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 [2022-07-11 23:54:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:13,382 INFO L225 Difference]: With dead ends: 4257 [2022-07-11 23:54:13,382 INFO L226 Difference]: Without dead ends: 2140 [2022-07-11 23:54:13,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:13,384 INFO L413 NwaCegarLoop]: 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 [2022-07-11 23:54:13,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 385 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:13,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-07-11 23:54:13,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2022-07-11 23:54:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.439457690509584) internal successors, (3079), 2139 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 3079 transitions. [2022-07-11 23:54:13,421 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 3079 transitions. Word has length 169 [2022-07-11 23:54:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:13,422 INFO L495 AbstractCegarLoop]: Abstraction has 2140 states and 3079 transitions. [2022-07-11 23:54:13,423 INFO L496 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) [2022-07-11 23:54:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 3079 transitions. [2022-07-11 23:54:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-07-11 23:54:13,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:13,426 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2022-07-11 23:54:13,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-11 23:54:13,426 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash 534257747, now seen corresponding path program 1 times [2022-07-11 23:54:13,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:13,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414434717] [2022-07-11 23:54:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:13,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 394 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-07-11 23:54:13,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:13,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414434717] [2022-07-11 23:54:13,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414434717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:13,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:13,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:13,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220770996] [2022-07-11 23:54:13,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:13,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:13,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:13,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:13,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:13,564 INFO L87 Difference]: Start difference. First operand 2140 states and 3079 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 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) [2022-07-11 23:54:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:14,780 INFO L93 Difference]: Finished difference Result 4530 states and 6506 transitions. [2022-07-11 23:54:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:14,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 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 262 [2022-07-11 23:54:14,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:14,785 INFO L225 Difference]: With dead ends: 4530 [2022-07-11 23:54:14,785 INFO L226 Difference]: Without dead ends: 2413 [2022-07-11 23:54:14,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:14,787 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 55 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:14,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 583 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-11 23:54:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2022-07-11 23:54:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2260. [2022-07-11 23:54:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2259 states have (on average 1.4391323594510845) internal successors, (3251), 2259 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3251 transitions. [2022-07-11 23:54:14,850 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3251 transitions. Word has length 262 [2022-07-11 23:54:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:14,850 INFO L495 AbstractCegarLoop]: Abstraction has 2260 states and 3251 transitions. [2022-07-11 23:54:14,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 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) [2022-07-11 23:54:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3251 transitions. [2022-07-11 23:54:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-11 23:54:14,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:14,853 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2022-07-11 23:54:14,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-11 23:54:14,854 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:14,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2140742793, now seen corresponding path program 1 times [2022-07-11 23:54:14,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:14,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666817157] [2022-07-11 23:54:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:14,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-07-11 23:54:14,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:14,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666817157] [2022-07-11 23:54:14,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666817157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:14,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:14,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:14,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412251519] [2022-07-11 23:54:14,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:14,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:14,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:14,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:14,963 INFO L87 Difference]: Start difference. First operand 2260 states and 3251 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) [2022-07-11 23:54:16,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:16,051 INFO L93 Difference]: Finished difference Result 4642 states and 6666 transitions. [2022-07-11 23:54:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:16,052 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 263 [2022-07-11 23:54:16,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:16,056 INFO L225 Difference]: With dead ends: 4642 [2022-07-11 23:54:16,057 INFO L226 Difference]: Without dead ends: 2405 [2022-07-11 23:54:16,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:16,061 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 52 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:16,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 579 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 23:54:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2022-07-11 23:54:16,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2264. [2022-07-11 23:54:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 2263 states have (on average 1.4383561643835616) internal successors, (3255), 2263 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 3255 transitions. [2022-07-11 23:54:16,096 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 3255 transitions. Word has length 263 [2022-07-11 23:54:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:16,097 INFO L495 AbstractCegarLoop]: Abstraction has 2264 states and 3255 transitions. [2022-07-11 23:54:16,097 INFO L496 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) [2022-07-11 23:54:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 3255 transitions. [2022-07-11 23:54:16,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-07-11 23:54:16,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:16,100 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 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] [2022-07-11 23:54:16,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-11 23:54:16,100 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:16,101 INFO L85 PathProgramCache]: Analyzing trace with hash -942402324, now seen corresponding path program 1 times [2022-07-11 23:54:16,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:16,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591986698] [2022-07-11 23:54:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:16,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 389 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-07-11 23:54:16,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:16,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591986698] [2022-07-11 23:54:16,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591986698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:16,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:16,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:16,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838657245] [2022-07-11 23:54:16,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:16,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:16,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:16,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:16,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:16,255 INFO L87 Difference]: Start difference. First operand 2264 states and 3255 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:17,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:17,134 INFO L93 Difference]: Finished difference Result 4614 states and 6614 transitions. [2022-07-11 23:54:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:17,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 266 [2022-07-11 23:54:17,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:17,138 INFO L225 Difference]: With dead ends: 4614 [2022-07-11 23:54:17,139 INFO L226 Difference]: Without dead ends: 2373 [2022-07-11 23:54:17,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:17,141 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 44 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:17,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 569 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:54:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2022-07-11 23:54:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2264. [2022-07-11 23:54:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 2263 states have (on average 1.4365885992045957) internal successors, (3251), 2263 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 3251 transitions. [2022-07-11 23:54:17,176 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 3251 transitions. Word has length 266 [2022-07-11 23:54:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:17,176 INFO L495 AbstractCegarLoop]: Abstraction has 2264 states and 3251 transitions. [2022-07-11 23:54:17,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 3251 transitions. [2022-07-11 23:54:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-07-11 23:54:17,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:17,179 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2022-07-11 23:54:17,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-11 23:54:17,180 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1669644410, now seen corresponding path program 1 times [2022-07-11 23:54:17,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:17,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095249985] [2022-07-11 23:54:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-11 23:54:17,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:17,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095249985] [2022-07-11 23:54:17,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095249985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:17,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:17,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:17,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896987476] [2022-07-11 23:54:17,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:17,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:17,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:17,299 INFO L87 Difference]: Start difference. First operand 2264 states and 3251 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) [2022-07-11 23:54:18,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:18,521 INFO L93 Difference]: Finished difference Result 4606 states and 6598 transitions. [2022-07-11 23:54:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:18,521 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 [2022-07-11 23:54:18,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:18,525 INFO L225 Difference]: With dead ends: 4606 [2022-07-11 23:54:18,525 INFO L226 Difference]: Without dead ends: 2365 [2022-07-11 23:54:18,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:18,527 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 36 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:18,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 565 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-11 23:54:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2022-07-11 23:54:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2244. [2022-07-11 23:54:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 1.4404814979937584) internal successors, (3231), 2243 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 3231 transitions. [2022-07-11 23:54:18,578 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 3231 transitions. Word has length 272 [2022-07-11 23:54:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:18,578 INFO L495 AbstractCegarLoop]: Abstraction has 2244 states and 3231 transitions. [2022-07-11 23:54:18,578 INFO L496 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) [2022-07-11 23:54:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 3231 transitions. [2022-07-11 23:54:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-07-11 23:54:18,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:18,581 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 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] [2022-07-11 23:54:18,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-11 23:54:18,581 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1221317824, now seen corresponding path program 1 times [2022-07-11 23:54:18,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:18,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757788879] [2022-07-11 23:54:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:18,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 453 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-07-11 23:54:18,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:18,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757788879] [2022-07-11 23:54:18,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757788879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:18,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:18,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384314776] [2022-07-11 23:54:18,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:18,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:18,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:18,693 INFO L87 Difference]: Start difference. First operand 2244 states and 3231 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:19,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:19,426 INFO L93 Difference]: Finished difference Result 4550 states and 6554 transitions. [2022-07-11 23:54:19,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:19,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 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 290 [2022-07-11 23:54:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:19,430 INFO L225 Difference]: With dead ends: 4550 [2022-07-11 23:54:19,430 INFO L226 Difference]: Without dead ends: 2329 [2022-07-11 23:54:19,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:19,433 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 37 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:19,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 570 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:54:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2022-07-11 23:54:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 2244. [2022-07-11 23:54:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 1.4386981720909495) internal successors, (3227), 2243 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 3227 transitions. [2022-07-11 23:54:19,470 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 3227 transitions. Word has length 290 [2022-07-11 23:54:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:19,470 INFO L495 AbstractCegarLoop]: Abstraction has 2244 states and 3227 transitions. [2022-07-11 23:54:19,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 3227 transitions. [2022-07-11 23:54:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-07-11 23:54:19,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:19,473 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:19,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-11 23:54:19,474 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:19,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1549103668, now seen corresponding path program 1 times [2022-07-11 23:54:19,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:19,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864497585] [2022-07-11 23:54:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:19,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 474 proven. 106 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 23:54:19,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:19,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864497585] [2022-07-11 23:54:19,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864497585] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:54:19,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355069572] [2022-07-11 23:54:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:19,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:54:19,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:54:19,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:54:19,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:54:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 23:54:20,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:54:20,610 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:54:20,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-11 23:54:20,647 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:54:20,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 23:54:20,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 23:54:20,677 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:54:20,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:54:20,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 23:54:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 477 proven. 64 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-07-11 23:54:20,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:54:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 482 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-11 23:54:20,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355069572] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:54:20,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:54:20,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-07-11 23:54:20,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279466364] [2022-07-11 23:54:20,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:20,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:20,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:54:20,794 INFO L87 Difference]: Start difference. First operand 2244 states and 3227 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) [2022-07-11 23:54:22,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:22,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:22,801 INFO L93 Difference]: Finished difference Result 4755 states and 6797 transitions. [2022-07-11 23:54:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:22,802 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 [2022-07-11 23:54:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:22,805 INFO L225 Difference]: With dead ends: 4755 [2022-07-11 23:54:22,805 INFO L226 Difference]: Without dead ends: 2534 [2022-07-11 23:54:22,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:54:22,807 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 96 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:22,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 402 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-11 23:54:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2022-07-11 23:54:22,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2304. [2022-07-11 23:54:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 1.4259661311333043) internal successors, (3284), 2303 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3284 transitions. [2022-07-11 23:54:22,891 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3284 transitions. Word has length 292 [2022-07-11 23:54:22,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:22,898 INFO L495 AbstractCegarLoop]: Abstraction has 2304 states and 3284 transitions. [2022-07-11 23:54:22,898 INFO L496 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) [2022-07-11 23:54:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3284 transitions. [2022-07-11 23:54:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-07-11 23:54:22,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:22,901 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:22,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:54:23,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-11 23:54:23,119 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1978761974, now seen corresponding path program 1 times [2022-07-11 23:54:23,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:23,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234611016] [2022-07-11 23:54:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:23,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-07-11 23:54:23,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:23,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234611016] [2022-07-11 23:54:23,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234611016] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:23,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:23,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:54:23,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617845773] [2022-07-11 23:54:23,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:23,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:54:23,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:23,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:54:23,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:54:23,412 INFO L87 Difference]: Start difference. First operand 2304 states and 3284 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) [2022-07-11 23:54:25,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:27,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:27,360 INFO L93 Difference]: Finished difference Result 6752 states and 9645 transitions. [2022-07-11 23:54:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:54:27,360 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 [2022-07-11 23:54:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:27,366 INFO L225 Difference]: With dead ends: 6752 [2022-07-11 23:54:27,366 INFO L226 Difference]: Without dead ends: 4471 [2022-07-11 23:54:27,367 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:54:27,368 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 194 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:27,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1230 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-11 23:54:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4471 states. [2022-07-11 23:54:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4471 to 4152. [2022-07-11 23:54:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4152 states, 4151 states have (on average 1.4459166465911828) internal successors, (6002), 4151 states have internal predecessors, (6002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4152 states to 4152 states and 6002 transitions. [2022-07-11 23:54:27,461 INFO L78 Accepts]: Start accepts. Automaton has 4152 states and 6002 transitions. Word has length 292 [2022-07-11 23:54:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:27,461 INFO L495 AbstractCegarLoop]: Abstraction has 4152 states and 6002 transitions. [2022-07-11 23:54:27,461 INFO L496 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) [2022-07-11 23:54:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 4152 states and 6002 transitions. [2022-07-11 23:54:27,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-07-11 23:54:27,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:27,466 INFO L195 NwaCegarLoop]: 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] [2022-07-11 23:54:27,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-11 23:54:27,467 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:27,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash -789789195, now seen corresponding path program 1 times [2022-07-11 23:54:27,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:27,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330228419] [2022-07-11 23:54:27,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:27,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-11 23:54:27,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:27,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330228419] [2022-07-11 23:54:27,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330228419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:27,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:27,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:27,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630604631] [2022-07-11 23:54:27,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:27,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:27,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:27,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:27,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:27,599 INFO L87 Difference]: Start difference. First operand 4152 states and 6002 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) [2022-07-11 23:54:28,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:28,119 INFO L93 Difference]: Finished difference Result 8403 states and 12119 transitions. [2022-07-11 23:54:28,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:28,120 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 [2022-07-11 23:54:28,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:28,125 INFO L225 Difference]: With dead ends: 8403 [2022-07-11 23:54:28,126 INFO L226 Difference]: Without dead ends: 4274 [2022-07-11 23:54:28,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:28,130 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 42 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:28,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 561 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2022-07-11 23:54:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 4148. [2022-07-11 23:54:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4148 states, 4147 states have (on average 1.444417651314203) internal successors, (5990), 4147 states have internal predecessors, (5990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4148 states to 4148 states and 5990 transitions. [2022-07-11 23:54:28,247 INFO L78 Accepts]: Start accepts. Automaton has 4148 states and 5990 transitions. Word has length 293 [2022-07-11 23:54:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:28,247 INFO L495 AbstractCegarLoop]: Abstraction has 4148 states and 5990 transitions. [2022-07-11 23:54:28,247 INFO L496 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) [2022-07-11 23:54:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4148 states and 5990 transitions. [2022-07-11 23:54:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-07-11 23:54:28,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:28,252 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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] [2022-07-11 23:54:28,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-11 23:54:28,252 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:28,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1786575207, now seen corresponding path program 1 times [2022-07-11 23:54:28,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:28,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432592977] [2022-07-11 23:54:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:28,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 484 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-11 23:54:28,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:28,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432592977] [2022-07-11 23:54:28,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432592977] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:28,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:28,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:28,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894194105] [2022-07-11 23:54:28,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:28,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:28,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:28,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:28,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:28,361 INFO L87 Difference]: Start difference. First operand 4148 states and 5990 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) [2022-07-11 23:54:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:28,894 INFO L93 Difference]: Finished difference Result 8391 states and 12091 transitions. [2022-07-11 23:54:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:28,894 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 [2022-07-11 23:54:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:28,900 INFO L225 Difference]: With dead ends: 8391 [2022-07-11 23:54:28,901 INFO L226 Difference]: Without dead ends: 4198 [2022-07-11 23:54:28,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:28,905 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 26 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:28,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 559 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2022-07-11 23:54:28,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 4108. [2022-07-11 23:54:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4108 states, 4107 states have (on average 1.4467981495008522) internal successors, (5942), 4107 states have internal predecessors, (5942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4108 states to 4108 states and 5942 transitions. [2022-07-11 23:54:28,976 INFO L78 Accepts]: Start accepts. Automaton has 4108 states and 5942 transitions. Word has length 293 [2022-07-11 23:54:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:28,976 INFO L495 AbstractCegarLoop]: Abstraction has 4108 states and 5942 transitions. [2022-07-11 23:54:28,976 INFO L496 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) [2022-07-11 23:54:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 4108 states and 5942 transitions. [2022-07-11 23:54:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-07-11 23:54:28,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:28,981 INFO L195 NwaCegarLoop]: 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] [2022-07-11 23:54:28,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-11 23:54:28,981 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:28,981 INFO L85 PathProgramCache]: Analyzing trace with hash 765728480, now seen corresponding path program 1 times [2022-07-11 23:54:28,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:28,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909902979] [2022-07-11 23:54:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:28,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 547 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-07-11 23:54:29,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:29,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909902979] [2022-07-11 23:54:29,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909902979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:29,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:29,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:29,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921755533] [2022-07-11 23:54:29,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:29,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:29,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:29,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:29,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:29,109 INFO L87 Difference]: Start difference. First operand 4108 states and 5942 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) [2022-07-11 23:54:30,734 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:30,978 INFO L93 Difference]: Finished difference Result 8283 states and 11967 transitions. [2022-07-11 23:54:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:30,979 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 [2022-07-11 23:54:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:30,984 INFO L225 Difference]: With dead ends: 8283 [2022-07-11 23:54:30,985 INFO L226 Difference]: Without dead ends: 4198 [2022-07-11 23:54:30,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:30,988 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 27 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:30,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 557 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-11 23:54:30,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2022-07-11 23:54:31,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 4108. [2022-07-11 23:54:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4108 states, 4107 states have (on average 1.4448502556610665) internal successors, (5934), 4107 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4108 states to 4108 states and 5934 transitions. [2022-07-11 23:54:31,061 INFO L78 Accepts]: Start accepts. Automaton has 4108 states and 5934 transitions. Word has length 314 [2022-07-11 23:54:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:31,061 INFO L495 AbstractCegarLoop]: Abstraction has 4108 states and 5934 transitions. [2022-07-11 23:54:31,061 INFO L496 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) [2022-07-11 23:54:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4108 states and 5934 transitions. [2022-07-11 23:54:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-07-11 23:54:31,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:31,066 INFO L195 NwaCegarLoop]: 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] [2022-07-11 23:54:31,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-11 23:54:31,067 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash 109235862, now seen corresponding path program 1 times [2022-07-11 23:54:31,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:31,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594433852] [2022-07-11 23:54:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:31,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 553 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-07-11 23:54:31,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:31,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594433852] [2022-07-11 23:54:31,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594433852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:31,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:31,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:31,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877035517] [2022-07-11 23:54:31,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:31,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:31,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:31,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:31,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:31,209 INFO L87 Difference]: Start difference. First operand 4108 states and 5934 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) [2022-07-11 23:54:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:31,632 INFO L93 Difference]: Finished difference Result 8251 states and 11909 transitions. [2022-07-11 23:54:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:31,632 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 [2022-07-11 23:54:31,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:31,637 INFO L225 Difference]: With dead ends: 8251 [2022-07-11 23:54:31,638 INFO L226 Difference]: Without dead ends: 4166 [2022-07-11 23:54:31,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:31,641 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 21 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:31,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 549 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2022-07-11 23:54:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 4108. [2022-07-11 23:54:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4108 states, 4107 states have (on average 1.4429023618212808) internal successors, (5926), 4107 states have internal predecessors, (5926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4108 states to 4108 states and 5926 transitions. [2022-07-11 23:54:31,714 INFO L78 Accepts]: Start accepts. Automaton has 4108 states and 5926 transitions. Word has length 315 [2022-07-11 23:54:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:31,715 INFO L495 AbstractCegarLoop]: Abstraction has 4108 states and 5926 transitions. [2022-07-11 23:54:31,715 INFO L496 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) [2022-07-11 23:54:31,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4108 states and 5926 transitions. [2022-07-11 23:54:31,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-07-11 23:54:31,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:31,720 INFO L195 NwaCegarLoop]: 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] [2022-07-11 23:54:31,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-11 23:54:31,720 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:31,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:31,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1142940541, now seen corresponding path program 1 times [2022-07-11 23:54:31,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:31,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649211890] [2022-07-11 23:54:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:31,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 597 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2022-07-11 23:54:31,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:31,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649211890] [2022-07-11 23:54:31,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649211890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:31,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:31,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:31,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819406013] [2022-07-11 23:54:31,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:31,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:31,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:31,847 INFO L87 Difference]: Start difference. First operand 4108 states and 5926 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) [2022-07-11 23:54:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:33,044 INFO L93 Difference]: Finished difference Result 8219 states and 11853 transitions. [2022-07-11 23:54:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:33,044 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 [2022-07-11 23:54:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:33,065 INFO L225 Difference]: With dead ends: 8219 [2022-07-11 23:54:33,065 INFO L226 Difference]: Without dead ends: 4102 [2022-07-11 23:54:33,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:33,080 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 15 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:33,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 541 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:54:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-07-11 23:54:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 4076. [2022-07-11 23:54:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4076 states, 4075 states have (on average 1.4444171779141104) internal successors, (5886), 4075 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 5886 transitions. [2022-07-11 23:54:33,238 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 5886 transitions. Word has length 316 [2022-07-11 23:54:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:33,238 INFO L495 AbstractCegarLoop]: Abstraction has 4076 states and 5886 transitions. [2022-07-11 23:54:33,238 INFO L496 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) [2022-07-11 23:54:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 5886 transitions. [2022-07-11 23:54:33,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-07-11 23:54:33,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:33,243 INFO L195 NwaCegarLoop]: 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] [2022-07-11 23:54:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-11 23:54:33,243 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:33,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -848179772, now seen corresponding path program 1 times [2022-07-11 23:54:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:33,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322816446] [2022-07-11 23:54:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:33,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 905 trivial. 0 not checked. [2022-07-11 23:54:33,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:33,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322816446] [2022-07-11 23:54:33,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322816446] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:33,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:33,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:54:33,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136192897] [2022-07-11 23:54:33,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:33,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:54:33,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:33,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:54:33,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:33,501 INFO L87 Difference]: Start difference. First operand 4076 states and 5886 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) [2022-07-11 23:54:35,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:35,836 INFO L93 Difference]: Finished difference Result 8149 states and 11768 transitions. [2022-07-11 23:54:35,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:54:35,837 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 [2022-07-11 23:54:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:35,859 INFO L225 Difference]: With dead ends: 8149 [2022-07-11 23:54:35,859 INFO L226 Difference]: Without dead ends: 4076 [2022-07-11 23:54:35,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:54:35,863 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:35,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 655 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:54:35,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2022-07-11 23:54:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 4076. [2022-07-11 23:54:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4076 states, 4075 states have (on average 1.4441717791411044) internal successors, (5885), 4075 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 5885 transitions. [2022-07-11 23:54:35,927 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 5885 transitions. Word has length 321 [2022-07-11 23:54:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:35,927 INFO L495 AbstractCegarLoop]: Abstraction has 4076 states and 5885 transitions. [2022-07-11 23:54:35,927 INFO L496 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) [2022-07-11 23:54:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 5885 transitions. [2022-07-11 23:54:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-07-11 23:54:35,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:35,933 INFO L195 NwaCegarLoop]: 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] [2022-07-11 23:54:35,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-11 23:54:35,933 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:35,934 INFO L85 PathProgramCache]: Analyzing trace with hash -746809786, now seen corresponding path program 1 times [2022-07-11 23:54:35,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:35,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530806532] [2022-07-11 23:54:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:35,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 399 proven. 413 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-07-11 23:54:36,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:36,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530806532] [2022-07-11 23:54:36,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530806532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:54:36,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136574575] [2022-07-11 23:54:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:36,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:54:36,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:54:36,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:54:36,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:54:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-11 23:54:37,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:54:37,918 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:54:37,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-11 23:54:38,049 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-11 23:54:38,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2022-07-11 23:54:38,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-11 23:54:38,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-11 23:54:38,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:38,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2022-07-11 23:54:38,167 INFO L356 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2022-07-11 23:54:38,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 60 [2022-07-11 23:54:38,180 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:54:38,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-07-11 23:54:38,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:38,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2022-07-11 23:54:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:38,700 INFO L356 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2022-07-11 23:54:38,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 49 [2022-07-11 23:54:38,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:38,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-07-11 23:54:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:38,771 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-11 23:54:38,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 68 [2022-07-11 23:54:38,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:38,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2022-07-11 23:54:38,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:38,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2022-07-11 23:54:39,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:39,329 INFO L356 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2022-07-11 23:54:39,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 155 [2022-07-11 23:54:39,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:39,367 INFO L356 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-07-11 23:54:39,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 132 [2022-07-11 23:54:39,409 INFO L356 Elim1Store]: treesize reduction 45, result has 52.6 percent of original size [2022-07-11 23:54:39,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 73 [2022-07-11 23:54:39,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:39,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:39,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:40,052 INFO L356 Elim1Store]: treesize reduction 148, result has 30.2 percent of original size [2022-07-11 23:54:40,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 275 treesize of output 300 [2022-07-11 23:54:40,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:40,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:40,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:40,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:40,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:40,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:40,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 321 treesize of output 267 [2022-07-11 23:54:40,088 INFO L356 Elim1Store]: treesize reduction 154, result has 15.4 percent of original size [2022-07-11 23:54:40,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 321 treesize of output 267 [2022-07-11 23:54:42,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:42,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:42,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:42,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 224 [2022-07-11 23:54:42,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:42,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:42,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:42,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 224 [2022-07-11 23:54:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:42,868 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-11 23:54:42,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 270 treesize of output 270 [2022-07-11 23:54:43,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:43,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 114 [2022-07-11 23:54:43,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:43,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 72 [2022-07-11 23:54:43,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:54:43,038 INFO L356 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2022-07-11 23:54:43,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 65 [2022-07-11 23:54:43,085 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-11 23:54:43,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-07-11 23:54:43,179 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:54:43,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 11 [2022-07-11 23:54:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 456 proven. 328 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-11 23:54:43,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:54:45,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:54:45,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:54:45,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 202 [2022-07-11 23:54:45,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:54:45,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:54:45,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 154 [2022-07-11 23:54:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 581 proven. 141 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-07-11 23:54:48,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136574575] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:54:48,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:54:48,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 14] total 43 [2022-07-11 23:54:48,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649060315] [2022-07-11 23:54:48,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:54:48,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-11 23:54:48,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:48,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-11 23:54:48,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2022-07-11 23:54:48,218 INFO L87 Difference]: Start difference. First operand 4076 states and 5885 transitions. Second operand has 43 states, 43 states have (on average 12.534883720930232) internal successors, (539), 43 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:50,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:51,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:53,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:55,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:23,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:23,296 INFO L93 Difference]: Finished difference Result 25946 states and 36131 transitions. [2022-07-11 23:55:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2022-07-11 23:55:23,296 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 12.534883720930232) internal successors, (539), 43 states have internal predecessors, (539), 0 states have call successors, (0), 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 [2022-07-11 23:55:23,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:23,318 INFO L225 Difference]: With dead ends: 25946 [2022-07-11 23:55:23,319 INFO L226 Difference]: Without dead ends: 21893 [2022-07-11 23:55:23,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 766 SyntacticMatches, 6 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38082 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=9296, Invalid=82210, Unknown=0, NotChecked=0, Total=91506 [2022-07-11 23:55:23,329 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 4571 mSDsluCounter, 13384 mSDsCounter, 0 mSdLazyCounter, 14071 mSolverCounterSat, 913 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4571 SdHoareTripleChecker+Valid, 14267 SdHoareTripleChecker+Invalid, 18986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 913 IncrementalHoareTripleChecker+Valid, 14071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4002 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:23,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4571 Valid, 14267 Invalid, 18986 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [913 Valid, 14071 Invalid, 0 Unknown, 4002 Unchecked, 22.0s Time] [2022-07-11 23:55:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21893 states. [2022-07-11 23:55:23,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21893 to 11019. [2022-07-11 23:55:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11019 states, 11018 states have (on average 1.4065166091849701) internal successors, (15497), 11018 states have internal predecessors, (15497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11019 states to 11019 states and 15497 transitions. [2022-07-11 23:55:23,763 INFO L78 Accepts]: Start accepts. Automaton has 11019 states and 15497 transitions. Word has length 321 [2022-07-11 23:55:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:23,763 INFO L495 AbstractCegarLoop]: Abstraction has 11019 states and 15497 transitions. [2022-07-11 23:55:23,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 12.534883720930232) internal successors, (539), 43 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 11019 states and 15497 transitions. [2022-07-11 23:55:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-07-11 23:55:23,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:23,773 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:23,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-11 23:55:23,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-11 23:55:23,989 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:23,989 INFO L85 PathProgramCache]: Analyzing trace with hash 856929381, now seen corresponding path program 1 times [2022-07-11 23:55:23,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:23,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329837170] [2022-07-11 23:55:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 611 proven. 55 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-07-11 23:55:24,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329837170] [2022-07-11 23:55:24,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329837170] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:55:24,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707197930] [2022-07-11 23:55:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:24,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:55:24,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:55:24,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:55:24,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:55:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:25,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1701 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 23:55:25,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:55:25,343 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:55:25,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-11 23:55:25,371 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:55:25,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 23:55:25,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 23:55:25,393 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:55:25,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:55:25,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 23:55:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 619 proven. 62 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-07-11 23:55:25,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:55:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 622 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-07-11 23:55:25,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707197930] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:55:25,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:55:25,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-07-11 23:55:25,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626974685] [2022-07-11 23:55:25,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:25,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:25,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:25,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:25,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:55:25,446 INFO L87 Difference]: Start difference. First operand 11019 states and 15497 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) [2022-07-11 23:55:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:26,678 INFO L93 Difference]: Finished difference Result 22600 states and 31749 transitions. [2022-07-11 23:55:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:26,679 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 331 [2022-07-11 23:55:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:26,690 INFO L225 Difference]: With dead ends: 22600 [2022-07-11 23:55:26,690 INFO L226 Difference]: Without dead ends: 11604 [2022-07-11 23:55:26,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:55:26,697 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 110 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:26,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 389 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:55:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11604 states. [2022-07-11 23:55:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11604 to 11095. [2022-07-11 23:55:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11095 states, 11094 states have (on average 1.3787632954750315) internal successors, (15296), 11094 states have internal predecessors, (15296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11095 states to 11095 states and 15296 transitions. [2022-07-11 23:55:27,035 INFO L78 Accepts]: Start accepts. Automaton has 11095 states and 15296 transitions. Word has length 331 [2022-07-11 23:55:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:27,036 INFO L495 AbstractCegarLoop]: Abstraction has 11095 states and 15296 transitions. [2022-07-11 23:55:27,036 INFO L496 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) [2022-07-11 23:55:27,036 INFO L276 IsEmpty]: Start isEmpty. Operand 11095 states and 15296 transitions. [2022-07-11 23:55:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-07-11 23:55:27,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:27,045 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 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, 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] [2022-07-11 23:55:27,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:55:27,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:55:27,267 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:27,267 INFO L85 PathProgramCache]: Analyzing trace with hash -532107386, now seen corresponding path program 1 times [2022-07-11 23:55:27,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:27,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498074703] [2022-07-11 23:55:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:27,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 630 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-07-11 23:55:27,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:27,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498074703] [2022-07-11 23:55:27,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498074703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:27,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:27,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:27,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118346078] [2022-07-11 23:55:27,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:27,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:27,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:27,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:27,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:27,435 INFO L87 Difference]: Start difference. First operand 11095 states and 15296 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) [2022-07-11 23:55:28,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:28,607 INFO L93 Difference]: Finished difference Result 22224 states and 30629 transitions. [2022-07-11 23:55:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:28,608 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 332 [2022-07-11 23:55:28,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:28,619 INFO L225 Difference]: With dead ends: 22224 [2022-07-11 23:55:28,619 INFO L226 Difference]: Without dead ends: 11152 [2022-07-11 23:55:28,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:28,627 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 13 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:28,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 535 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 23:55:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11152 states. [2022-07-11 23:55:28,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11152 to 11095. [2022-07-11 23:55:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11095 states, 11094 states have (on average 1.377230935640887) internal successors, (15279), 11094 states have internal predecessors, (15279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11095 states to 11095 states and 15279 transitions. [2022-07-11 23:55:28,985 INFO L78 Accepts]: Start accepts. Automaton has 11095 states and 15279 transitions. Word has length 332 [2022-07-11 23:55:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:28,986 INFO L495 AbstractCegarLoop]: Abstraction has 11095 states and 15279 transitions. [2022-07-11 23:55:28,986 INFO L496 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) [2022-07-11 23:55:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 11095 states and 15279 transitions. [2022-07-11 23:55:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-07-11 23:55:28,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:28,994 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 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, 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] [2022-07-11 23:55:28,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-11 23:55:28,994 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:28,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:28,995 INFO L85 PathProgramCache]: Analyzing trace with hash -803009120, now seen corresponding path program 1 times [2022-07-11 23:55:28,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:28,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983230010] [2022-07-11 23:55:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:28,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 638 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-07-11 23:55:29,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:29,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983230010] [2022-07-11 23:55:29,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983230010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:29,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:29,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:29,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461539923] [2022-07-11 23:55:29,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:29,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:29,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:29,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:29,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:29,113 INFO L87 Difference]: Start difference. First operand 11095 states and 15279 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:30,545 INFO L93 Difference]: Finished difference Result 22167 states and 30532 transitions. [2022-07-11 23:55:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:30,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 333 [2022-07-11 23:55:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:30,555 INFO L225 Difference]: With dead ends: 22167 [2022-07-11 23:55:30,555 INFO L226 Difference]: Without dead ends: 10697 [2022-07-11 23:55:30,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:30,563 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 10 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:30,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 529 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:55:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10697 states. [2022-07-11 23:55:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10697 to 10499. [2022-07-11 23:55:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10499 states, 10498 states have (on average 1.3788340636311678) internal successors, (14475), 10498 states have internal predecessors, (14475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10499 states to 10499 states and 14475 transitions. [2022-07-11 23:55:30,898 INFO L78 Accepts]: Start accepts. Automaton has 10499 states and 14475 transitions. Word has length 333 [2022-07-11 23:55:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:30,898 INFO L495 AbstractCegarLoop]: Abstraction has 10499 states and 14475 transitions. [2022-07-11 23:55:30,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 10499 states and 14475 transitions. [2022-07-11 23:55:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-07-11 23:55:30,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:30,907 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1] [2022-07-11 23:55:30,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-11 23:55:30,907 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1819388906, now seen corresponding path program 1 times [2022-07-11 23:55:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:30,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795475561] [2022-07-11 23:55:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:30,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 573 proven. 26 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2022-07-11 23:55:31,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:31,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795475561] [2022-07-11 23:55:31,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795475561] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:55:31,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257678530] [2022-07-11 23:55:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:31,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:55:31,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:55:31,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:55:31,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:55:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:32,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1676 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 23:55:32,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:55:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 513 proven. 0 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2022-07-11 23:55:32,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:55:32,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257678530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:32,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:55:32,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-11 23:55:32,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988783863] [2022-07-11 23:55:32,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:32,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:55:32,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:32,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:55:32,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:55:32,322 INFO L87 Difference]: Start difference. First operand 10499 states and 14475 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:32,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:32,685 INFO L93 Difference]: Finished difference Result 13821 states and 19134 transitions. [2022-07-11 23:55:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:55:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 333 [2022-07-11 23:55:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:32,702 INFO L225 Difference]: With dead ends: 13821 [2022-07-11 23:55:32,702 INFO L226 Difference]: Without dead ends: 13816 [2022-07-11 23:55:32,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:55:32,707 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 145 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:32,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 363 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:55:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13816 states. [2022-07-11 23:55:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13816 to 13707. [2022-07-11 23:55:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13707 states, 13706 states have (on average 1.3838464905880636) internal successors, (18967), 13706 states have internal predecessors, (18967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13707 states to 13707 states and 18967 transitions. [2022-07-11 23:55:33,216 INFO L78 Accepts]: Start accepts. Automaton has 13707 states and 18967 transitions. Word has length 333 [2022-07-11 23:55:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:33,216 INFO L495 AbstractCegarLoop]: Abstraction has 13707 states and 18967 transitions. [2022-07-11 23:55:33,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 13707 states and 18967 transitions. [2022-07-11 23:55:33,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-07-11 23:55:33,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:33,227 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:33,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:55:33,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:55:33,434 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:33,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:33,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1879342140, now seen corresponding path program 2 times [2022-07-11 23:55:33,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:33,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434032543] [2022-07-11 23:55:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:33,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 567 proven. 92 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-07-11 23:55:34,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:34,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434032543] [2022-07-11 23:55:34,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434032543] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:55:34,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768293615] [2022-07-11 23:55:34,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:55:34,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:55:34,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:55:34,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:55:34,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:56:03,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:56:03,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:56:03,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 211 conjunts are in the unsatisfiable core [2022-07-11 23:56:03,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:56:04,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 17 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32538 treesize of output 27402 [2022-07-11 23:56:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:04,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 20 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12148 treesize of output 1898 [2022-07-11 23:56:09,219 INFO L244 Elim1Store]: Index analysis took 221 ms