./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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.02.i.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:37:23,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:37:23,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:37:23,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:37:23,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:37:23,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:37:23,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:37:23,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:37:23,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:37:23,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:37:23,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:37:23,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:37:23,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:37:23,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:37:23,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:37:23,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:37:23,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:37:23,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:37:23,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:37:23,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:37:23,248 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:37:23,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:37:23,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:37:23,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:37:23,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:37:23,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:37:23,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:37:23,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:37:23,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:37:23,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:37:23,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:37:23,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:37:23,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:37:23,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:37:23,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:37:23,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:37:23,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:37:23,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:37:23,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:37:23,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:37:23,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:37:23,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:37:23,270 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:37:23,294 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:37:23,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:37:23,295 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:37:23,295 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:37:23,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:37:23,296 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:37:23,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:37:23,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:37:23,297 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:37:23,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:37:23,297 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:37:23,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:37:23,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:37:23,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:37:23,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:37:23,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:37:23,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:37:23,299 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:37:23,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:37:23,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:37:23,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:37:23,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:37:23,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:37:23,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:37:23,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:37:23,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:37:23,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:37:23,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:37:23,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:37:23,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:37:23,301 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:37:23,301 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:37:23,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:37:23,301 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2022-07-20 22:37:23,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:37:23,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:37:23,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:37:23,585 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:37:23,585 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:37:23,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2022-07-20 22:37:23,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d309db9/caa516ed2f3c4a438967a48252c77ddf/FLAG7a5056de6 [2022-07-20 22:37:24,089 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:37:24,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2022-07-20 22:37:24,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d309db9/caa516ed2f3c4a438967a48252c77ddf/FLAG7a5056de6 [2022-07-20 22:37:24,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d309db9/caa516ed2f3c4a438967a48252c77ddf [2022-07-20 22:37:24,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:37:24,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:37:24,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:37:24,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:37:24,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:37:24,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a9a6f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24, skipping insertion in model container [2022-07-20 22:37:24,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:37:24,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:37:24,471 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.02.i.cil-2.c[72502,72515] [2022-07-20 22:37:24,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:37:24,496 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:37:24,597 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.02.i.cil-2.c[72502,72515] [2022-07-20 22:37:24,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:37:24,616 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:37:24,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24 WrapperNode [2022-07-20 22:37:24,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:37:24,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:37:24,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:37:24,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:37:24,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,679 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 782 [2022-07-20 22:37:24,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:37:24,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:37:24,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:37:24,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:37:24,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:37:24,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:37:24,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:37:24,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:37:24,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24" (1/1) ... [2022-07-20 22:37:24,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:37:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:37:24,765 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) [2022-07-20 22:37:24,770 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 [2022-07-20 22:37:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:37:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 22:37:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:37:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:37:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 22:37:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:37:24,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 22:37:24,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:37:24,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:37:24,946 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:37:24,948 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:37:24,957 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:37:27,566 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-20 22:37:27,567 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-20 22:37:27,567 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:37:27,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:37:27,575 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 22:37:27,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:37:27 BoogieIcfgContainer [2022-07-20 22:37:27,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:37:27,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:37:27,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:37:27,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:37:27,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:37:24" (1/3) ... [2022-07-20 22:37:27,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa351b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:37:27, skipping insertion in model container [2022-07-20 22:37:27,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:24" (2/3) ... [2022-07-20 22:37:27,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa351b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:37:27, skipping insertion in model container [2022-07-20 22:37:27,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:37:27" (3/3) ... [2022-07-20 22:37:27,584 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.02.i.cil-2.c [2022-07-20 22:37:27,593 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:37:27,594 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:37:27,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:37:27,651 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@1758da5c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52b852de [2022-07-20 22:37:27,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:37:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 22:37:27,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:27,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:27,664 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:27,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1430118927, now seen corresponding path program 1 times [2022-07-20 22:37:27,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:27,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879111134] [2022-07-20 22:37:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:27,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:28,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:28,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879111134] [2022-07-20 22:37:28,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879111134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:28,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:28,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:28,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000516208] [2022-07-20 22:37:28,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:28,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:28,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:28,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:28,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:28,102 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 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 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:30,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:30,616 INFO L93 Difference]: Finished difference Result 406 states and 687 transitions. [2022-07-20 22:37:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:30,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-20 22:37:30,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:30,628 INFO L225 Difference]: With dead ends: 406 [2022-07-20 22:37:30,628 INFO L226 Difference]: Without dead ends: 246 [2022-07-20 22:37:30,630 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 [2022-07-20 22:37:30,632 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:30,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 411 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 274 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 22:37:30,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-20 22:37:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 175. [2022-07-20 22:37:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.6091954022988506) internal successors, (280), 174 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 280 transitions. [2022-07-20 22:37:30,666 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 280 transitions. Word has length 47 [2022-07-20 22:37:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:30,666 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 280 transitions. [2022-07-20 22:37:30,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 280 transitions. [2022-07-20 22:37:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:37:30,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:30,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:30,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:37:30,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:30,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:30,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1376829262, now seen corresponding path program 1 times [2022-07-20 22:37:30,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:30,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626717637] [2022-07-20 22:37:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:30,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:30,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:30,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626717637] [2022-07-20 22:37:30,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626717637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:30,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:30,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:30,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232207368] [2022-07-20 22:37:30,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:30,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:30,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:30,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:30,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:30,861 INFO L87 Difference]: Start difference. First operand 175 states and 280 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:32,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:33,093 INFO L93 Difference]: Finished difference Result 368 states and 587 transitions. [2022-07-20 22:37:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:33,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2022-07-20 22:37:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:33,095 INFO L225 Difference]: With dead ends: 368 [2022-07-20 22:37:33,095 INFO L226 Difference]: Without dead ends: 203 [2022-07-20 22:37:33,096 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 [2022-07-20 22:37:33,096 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 22 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:33,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 439 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:37:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-20 22:37:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2022-07-20 22:37:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6162162162162161) internal successors, (299), 185 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 299 transitions. [2022-07-20 22:37:33,111 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 299 transitions. Word has length 48 [2022-07-20 22:37:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:33,112 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 299 transitions. [2022-07-20 22:37:33,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 299 transitions. [2022-07-20 22:37:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 22:37:33,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:33,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:33,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:37:33,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1875534592, now seen corresponding path program 1 times [2022-07-20 22:37:33,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:33,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758366814] [2022-07-20 22:37:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:33,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:33,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:33,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758366814] [2022-07-20 22:37:33,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758366814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:33,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:33,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:33,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419754043] [2022-07-20 22:37:33,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:33,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:33,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:33,201 INFO L87 Difference]: Start difference. First operand 186 states and 299 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) [2022-07-20 22:37:35,215 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 [] [2022-07-20 22:37:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:35,426 INFO L93 Difference]: Finished difference Result 368 states and 586 transitions. [2022-07-20 22:37:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:35,427 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 [2022-07-20 22:37:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:35,428 INFO L225 Difference]: With dead ends: 368 [2022-07-20 22:37:35,428 INFO L226 Difference]: Without dead ends: 203 [2022-07-20 22:37:35,429 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 [2022-07-20 22:37:35,430 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 24 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:35,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 441 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:37:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-20 22:37:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2022-07-20 22:37:35,447 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) [2022-07-20 22:37:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 298 transitions. [2022-07-20 22:37:35,448 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 298 transitions. Word has length 61 [2022-07-20 22:37:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:35,451 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 298 transitions. [2022-07-20 22:37:35,451 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) [2022-07-20 22:37:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 298 transitions. [2022-07-20 22:37:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:37:35,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:35,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:35,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:37:35,453 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:35,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1839351473, now seen corresponding path program 1 times [2022-07-20 22:37:35,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:35,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377378456] [2022-07-20 22:37:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:35,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:35,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:35,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377378456] [2022-07-20 22:37:35,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377378456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:35,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:35,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:35,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560671564] [2022-07-20 22:37:35,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:35,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:35,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:35,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:35,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:35,553 INFO L87 Difference]: Start difference. First operand 186 states and 298 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) [2022-07-20 22:37:36,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:36,706 INFO L93 Difference]: Finished difference Result 367 states and 584 transitions. [2022-07-20 22:37:36,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:36,707 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 [2022-07-20 22:37:36,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:36,708 INFO L225 Difference]: With dead ends: 367 [2022-07-20 22:37:36,708 INFO L226 Difference]: Without dead ends: 202 [2022-07-20 22:37:36,708 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 [2022-07-20 22:37:36,709 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 28 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:36,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 443 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 22:37:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-20 22:37:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 186. [2022-07-20 22:37:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6054054054054054) internal successors, (297), 185 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 297 transitions. [2022-07-20 22:37:36,714 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 297 transitions. Word has length 62 [2022-07-20 22:37:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:36,714 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 297 transitions. [2022-07-20 22:37:36,714 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) [2022-07-20 22:37:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 297 transitions. [2022-07-20 22:37:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:37:36,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:36,716 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:36,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:37:36,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:36,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1630821317, now seen corresponding path program 1 times [2022-07-20 22:37:36,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:36,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881868954] [2022-07-20 22:37:36,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:36,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:36,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:36,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881868954] [2022-07-20 22:37:36,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881868954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:36,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:36,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:36,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619146074] [2022-07-20 22:37:36,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:36,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:36,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:36,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:36,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:36,793 INFO L87 Difference]: Start difference. First operand 186 states and 297 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) [2022-07-20 22:37:38,807 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 [] [2022-07-20 22:37:39,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:39,009 INFO L93 Difference]: Finished difference Result 367 states and 583 transitions. [2022-07-20 22:37:39,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:39,010 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 [2022-07-20 22:37:39,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:39,011 INFO L225 Difference]: With dead ends: 367 [2022-07-20 22:37:39,011 INFO L226 Difference]: Without dead ends: 202 [2022-07-20 22:37:39,012 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 [2022-07-20 22:37:39,012 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 26 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:39,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 443 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:37:39,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-20 22:37:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 186. [2022-07-20 22:37:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6) internal successors, (296), 185 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 296 transitions. [2022-07-20 22:37:39,017 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 296 transitions. Word has length 62 [2022-07-20 22:37:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:39,017 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 296 transitions. [2022-07-20 22:37:39,017 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) [2022-07-20 22:37:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 296 transitions. [2022-07-20 22:37:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:37:39,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:39,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:39,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 22:37:39,021 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:39,022 INFO L85 PathProgramCache]: Analyzing trace with hash 509961732, now seen corresponding path program 1 times [2022-07-20 22:37:39,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:39,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566759042] [2022-07-20 22:37:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:39,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:39,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:39,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566759042] [2022-07-20 22:37:39,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566759042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:39,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:39,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:39,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119548690] [2022-07-20 22:37:39,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:39,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:39,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:39,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:39,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:39,128 INFO L87 Difference]: Start difference. First operand 186 states and 296 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) [2022-07-20 22:37:40,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:40,823 INFO L93 Difference]: Finished difference Result 366 states and 581 transitions. [2022-07-20 22:37:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:40,824 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 [2022-07-20 22:37:40,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:40,825 INFO L225 Difference]: With dead ends: 366 [2022-07-20 22:37:40,825 INFO L226 Difference]: Without dead ends: 201 [2022-07-20 22:37:40,825 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 [2022-07-20 22:37:40,825 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 19 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:40,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 445 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-20 22:37:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-20 22:37:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 186. [2022-07-20 22:37:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5945945945945945) internal successors, (295), 185 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 295 transitions. [2022-07-20 22:37:40,829 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 295 transitions. Word has length 62 [2022-07-20 22:37:40,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:40,829 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 295 transitions. [2022-07-20 22:37:40,830 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) [2022-07-20 22:37:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 295 transitions. [2022-07-20 22:37:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:37:40,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:40,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:40,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:37:40,830 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:40,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:40,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1144939844, now seen corresponding path program 1 times [2022-07-20 22:37:40,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:40,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877590922] [2022-07-20 22:37:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:40,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:40,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:40,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877590922] [2022-07-20 22:37:40,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877590922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:40,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:40,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:40,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209649652] [2022-07-20 22:37:40,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:40,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:40,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:40,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:40,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:40,943 INFO L87 Difference]: Start difference. First operand 186 states and 295 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) [2022-07-20 22:37:42,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:43,115 INFO L93 Difference]: Finished difference Result 364 states and 578 transitions. [2022-07-20 22:37:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:43,120 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 [2022-07-20 22:37:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:43,121 INFO L225 Difference]: With dead ends: 364 [2022-07-20 22:37:43,121 INFO L226 Difference]: Without dead ends: 199 [2022-07-20 22:37:43,121 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 [2022-07-20 22:37:43,122 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 19 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:43,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:37:43,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-20 22:37:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-07-20 22:37:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5891891891891892) internal successors, (294), 185 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 294 transitions. [2022-07-20 22:37:43,125 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 294 transitions. Word has length 62 [2022-07-20 22:37:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:43,125 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 294 transitions. [2022-07-20 22:37:43,126 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) [2022-07-20 22:37:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 294 transitions. [2022-07-20 22:37:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 22:37:43,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:43,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:43,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:37:43,126 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:43,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:43,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1652438455, now seen corresponding path program 1 times [2022-07-20 22:37:43,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:43,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762575878] [2022-07-20 22:37:43,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:43,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:43,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:43,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762575878] [2022-07-20 22:37:43,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762575878] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:43,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:43,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:43,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223016578] [2022-07-20 22:37:43,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:43,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:43,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:43,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:43,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:43,209 INFO L87 Difference]: Start difference. First operand 186 states and 294 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:44,252 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 [] [2022-07-20 22:37:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:44,421 INFO L93 Difference]: Finished difference Result 364 states and 577 transitions. [2022-07-20 22:37:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:44,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-20 22:37:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:44,423 INFO L225 Difference]: With dead ends: 364 [2022-07-20 22:37:44,423 INFO L226 Difference]: Without dead ends: 199 [2022-07-20 22:37:44,423 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 [2022-07-20 22:37:44,424 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 22 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:44,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 22:37:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-20 22:37:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-07-20 22:37:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5837837837837838) internal successors, (293), 185 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 293 transitions. [2022-07-20 22:37:44,427 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 293 transitions. Word has length 63 [2022-07-20 22:37:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:44,427 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 293 transitions. [2022-07-20 22:37:44,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 293 transitions. [2022-07-20 22:37:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 22:37:44,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:44,428 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:44,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 22:37:44,428 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:44,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:44,428 INFO L85 PathProgramCache]: Analyzing trace with hash -848424362, now seen corresponding path program 1 times [2022-07-20 22:37:44,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:44,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534525300] [2022-07-20 22:37:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:44,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:44,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:44,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534525300] [2022-07-20 22:37:44,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534525300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:44,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:44,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:44,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978191539] [2022-07-20 22:37:44,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:44,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:44,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:44,522 INFO L87 Difference]: Start difference. First operand 186 states and 293 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:46,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:46,380 INFO L93 Difference]: Finished difference Result 364 states and 576 transitions. [2022-07-20 22:37:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-20 22:37:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:46,381 INFO L225 Difference]: With dead ends: 364 [2022-07-20 22:37:46,381 INFO L226 Difference]: Without dead ends: 199 [2022-07-20 22:37:46,381 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 [2022-07-20 22:37:46,382 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 20 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:46,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 22:37:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-20 22:37:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-07-20 22:37:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5783783783783785) internal successors, (292), 185 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 292 transitions. [2022-07-20 22:37:46,385 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 292 transitions. Word has length 64 [2022-07-20 22:37:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:46,386 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 292 transitions. [2022-07-20 22:37:46,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 292 transitions. [2022-07-20 22:37:46,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:37:46,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:46,386 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:46,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 22:37:46,386 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2026506290, now seen corresponding path program 1 times [2022-07-20 22:37:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:46,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317337493] [2022-07-20 22:37:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:46,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:46,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:46,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317337493] [2022-07-20 22:37:46,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317337493] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:46,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:46,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:46,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667028601] [2022-07-20 22:37:46,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:46,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:46,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:46,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:46,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:46,466 INFO L87 Difference]: Start difference. First operand 186 states and 292 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:48,479 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 [] [2022-07-20 22:37:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:48,642 INFO L93 Difference]: Finished difference Result 354 states and 562 transitions. [2022-07-20 22:37:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:48,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2022-07-20 22:37:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:48,643 INFO L225 Difference]: With dead ends: 354 [2022-07-20 22:37:48,643 INFO L226 Difference]: Without dead ends: 189 [2022-07-20 22:37:48,644 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 [2022-07-20 22:37:48,644 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 11 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:48,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 463 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:37:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-20 22:37:48,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2022-07-20 22:37:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.572972972972973) internal successors, (291), 185 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 291 transitions. [2022-07-20 22:37:48,649 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 291 transitions. Word has length 65 [2022-07-20 22:37:48,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:48,649 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 291 transitions. [2022-07-20 22:37:48,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:48,650 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 291 transitions. [2022-07-20 22:37:48,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:37:48,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:48,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:48,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 22:37:48,650 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:48,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:48,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1546297802, now seen corresponding path program 1 times [2022-07-20 22:37:48,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:48,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678105373] [2022-07-20 22:37:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:48,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:48,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:48,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678105373] [2022-07-20 22:37:48,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678105373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:48,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:48,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:48,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186137260] [2022-07-20 22:37:48,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:48,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:48,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:48,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:48,736 INFO L87 Difference]: Start difference. First operand 186 states and 291 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:50,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:51,064 INFO L93 Difference]: Finished difference Result 465 states and 733 transitions. [2022-07-20 22:37:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:51,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2022-07-20 22:37:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:51,066 INFO L225 Difference]: With dead ends: 465 [2022-07-20 22:37:51,066 INFO L226 Difference]: Without dead ends: 298 [2022-07-20 22:37:51,066 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 [2022-07-20 22:37:51,067 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 111 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:51,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 312 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:37:51,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-20 22:37:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 228. [2022-07-20 22:37:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.6255506607929515) internal successors, (369), 227 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 369 transitions. [2022-07-20 22:37:51,071 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 369 transitions. Word has length 65 [2022-07-20 22:37:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:51,071 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 369 transitions. [2022-07-20 22:37:51,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 369 transitions. [2022-07-20 22:37:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-20 22:37:51,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:51,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:51,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 22:37:51,073 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:51,073 INFO L85 PathProgramCache]: Analyzing trace with hash 632591508, now seen corresponding path program 1 times [2022-07-20 22:37:51,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:51,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578104122] [2022-07-20 22:37:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:51,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:51,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:51,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578104122] [2022-07-20 22:37:51,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578104122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:51,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:51,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:51,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346187433] [2022-07-20 22:37:51,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:51,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:51,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:51,178 INFO L87 Difference]: Start difference. First operand 228 states and 369 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:53,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:53,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:53,498 INFO L93 Difference]: Finished difference Result 544 states and 881 transitions. [2022-07-20 22:37:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:53,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-20 22:37:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:53,499 INFO L225 Difference]: With dead ends: 544 [2022-07-20 22:37:53,499 INFO L226 Difference]: Without dead ends: 337 [2022-07-20 22:37:53,500 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 [2022-07-20 22:37:53,500 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 119 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:53,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 314 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:37:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-20 22:37:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 260. [2022-07-20 22:37:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.6447876447876448) internal successors, (426), 259 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 426 transitions. [2022-07-20 22:37:53,505 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 426 transitions. Word has length 93 [2022-07-20 22:37:53,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:53,505 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 426 transitions. [2022-07-20 22:37:53,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:53,505 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 426 transitions. [2022-07-20 22:37:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-20 22:37:53,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:53,515 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:53,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 22:37:53,515 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1221146161, now seen corresponding path program 1 times [2022-07-20 22:37:53,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:53,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900585900] [2022-07-20 22:37:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:53,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:53,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:53,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900585900] [2022-07-20 22:37:53,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900585900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:53,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:53,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:53,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345472853] [2022-07-20 22:37:53,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:53,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:53,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:53,615 INFO L87 Difference]: Start difference. First operand 260 states and 426 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) [2022-07-20 22:37:55,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:55,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:55,920 INFO L93 Difference]: Finished difference Result 613 states and 1000 transitions. [2022-07-20 22:37:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:55,921 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 105 [2022-07-20 22:37:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:55,922 INFO L225 Difference]: With dead ends: 613 [2022-07-20 22:37:55,922 INFO L226 Difference]: Without dead ends: 374 [2022-07-20 22:37:55,922 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 [2022-07-20 22:37:55,923 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 111 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:55,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 318 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:37:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-07-20 22:37:55,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 303. [2022-07-20 22:37:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.6622516556291391) internal successors, (502), 302 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 502 transitions. [2022-07-20 22:37:55,928 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 502 transitions. Word has length 105 [2022-07-20 22:37:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:55,928 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 502 transitions. [2022-07-20 22:37:55,928 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) [2022-07-20 22:37:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 502 transitions. [2022-07-20 22:37:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-20 22:37:55,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:55,929 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:55,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:37:55,929 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1500161074, now seen corresponding path program 1 times [2022-07-20 22:37:55,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:55,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759912945] [2022-07-20 22:37:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:55,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 22:37:56,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:56,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759912945] [2022-07-20 22:37:56,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759912945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:56,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:56,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:56,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251482132] [2022-07-20 22:37:56,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:56,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:56,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:56,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:56,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:56,018 INFO L87 Difference]: Start difference. First operand 303 states and 502 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) [2022-07-20 22:37:58,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:58,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:58,357 INFO L93 Difference]: Finished difference Result 697 states and 1149 transitions. [2022-07-20 22:37:58,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:58,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-20 22:37:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:58,359 INFO L225 Difference]: With dead ends: 697 [2022-07-20 22:37:58,359 INFO L226 Difference]: Without dead ends: 415 [2022-07-20 22:37:58,360 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 [2022-07-20 22:37:58,360 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 136 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:58,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 302 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:37:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-07-20 22:37:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 319. [2022-07-20 22:37:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.650943396226415) internal successors, (525), 318 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 525 transitions. [2022-07-20 22:37:58,365 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 525 transitions. Word has length 106 [2022-07-20 22:37:58,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:58,365 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 525 transitions. [2022-07-20 22:37:58,365 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) [2022-07-20 22:37:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 525 transitions. [2022-07-20 22:37:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-20 22:37:58,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:58,366 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, 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] [2022-07-20 22:37:58,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 22:37:58,366 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:58,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2144263610, now seen corresponding path program 1 times [2022-07-20 22:37:58,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:58,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56335027] [2022-07-20 22:37:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:58,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-20 22:37:58,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56335027] [2022-07-20 22:37:58,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56335027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:58,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:58,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:58,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306617330] [2022-07-20 22:37:58,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:58,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:58,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:58,462 INFO L87 Difference]: Start difference. First operand 319 states and 525 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:59,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:59,752 INFO L93 Difference]: Finished difference Result 661 states and 1092 transitions. [2022-07-20 22:37:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:59,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-20 22:37:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:59,753 INFO L225 Difference]: With dead ends: 661 [2022-07-20 22:37:59,753 INFO L226 Difference]: Without dead ends: 363 [2022-07-20 22:37:59,754 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 [2022-07-20 22:37:59,754 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 35 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:59,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 461 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 22:37:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-20 22:37:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2022-07-20 22:37:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6529411764705881) internal successors, (562), 340 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 562 transitions. [2022-07-20 22:37:59,763 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 562 transitions. Word has length 106 [2022-07-20 22:37:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:59,763 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 562 transitions. [2022-07-20 22:37:59,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 562 transitions. [2022-07-20 22:37:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-20 22:37:59,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:59,764 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:59,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 22:37:59,765 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:59,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1195785078, now seen corresponding path program 1 times [2022-07-20 22:37:59,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:59,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2526264] [2022-07-20 22:37:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:59,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 22:37:59,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:59,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2526264] [2022-07-20 22:37:59,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2526264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:59,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:59,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:59,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414159335] [2022-07-20 22:37:59,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:59,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:59,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:59,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:59,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:59,849 INFO L87 Difference]: Start difference. First operand 341 states and 562 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) [2022-07-20 22:38:01,863 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 [] [2022-07-20 22:38:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:02,146 INFO L93 Difference]: Finished difference Result 731 states and 1193 transitions. [2022-07-20 22:38:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:02,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-07-20 22:38:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:02,148 INFO L225 Difference]: With dead ends: 731 [2022-07-20 22:38:02,148 INFO L226 Difference]: Without dead ends: 411 [2022-07-20 22:38:02,149 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 [2022-07-20 22:38:02,149 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 135 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:02,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 316 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-07-20 22:38:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 341. [2022-07-20 22:38:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.638235294117647) internal successors, (557), 340 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) [2022-07-20 22:38:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 557 transitions. [2022-07-20 22:38:02,155 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 557 transitions. Word has length 107 [2022-07-20 22:38:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:02,155 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 557 transitions. [2022-07-20 22:38:02,156 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) [2022-07-20 22:38:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 557 transitions. [2022-07-20 22:38:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-20 22:38:02,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:02,157 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:02,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 22:38:02,157 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:02,157 INFO L85 PathProgramCache]: Analyzing trace with hash 240959469, now seen corresponding path program 1 times [2022-07-20 22:38:02,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:02,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492283451] [2022-07-20 22:38:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 22:38:02,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:02,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492283451] [2022-07-20 22:38:02,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492283451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:02,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:02,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:02,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003364865] [2022-07-20 22:38:02,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:02,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:02,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:02,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:02,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:02,232 INFO L87 Difference]: Start difference. First operand 341 states and 557 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:03,779 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 [] [2022-07-20 22:38:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:04,073 INFO L93 Difference]: Finished difference Result 730 states and 1182 transitions. [2022-07-20 22:38:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:04,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-20 22:38:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:04,075 INFO L225 Difference]: With dead ends: 730 [2022-07-20 22:38:04,075 INFO L226 Difference]: Without dead ends: 410 [2022-07-20 22:38:04,075 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 [2022-07-20 22:38:04,076 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 140 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 318 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 [2022-07-20 22:38:04,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 318 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 22:38:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-20 22:38:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2022-07-20 22:38:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6205882352941177) internal successors, (551), 340 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 551 transitions. [2022-07-20 22:38:04,081 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 551 transitions. Word has length 120 [2022-07-20 22:38:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:04,082 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 551 transitions. [2022-07-20 22:38:04,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 551 transitions. [2022-07-20 22:38:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-20 22:38:04,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:04,083 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:04,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 22:38:04,083 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:04,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1953173121, now seen corresponding path program 1 times [2022-07-20 22:38:04,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:04,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442516844] [2022-07-20 22:38:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:04,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 22:38:04,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:04,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442516844] [2022-07-20 22:38:04,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442516844] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:04,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:04,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:04,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071363234] [2022-07-20 22:38:04,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:04,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:04,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:04,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:04,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:04,153 INFO L87 Difference]: Start difference. First operand 341 states and 551 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:06,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:06,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:06,443 INFO L93 Difference]: Finished difference Result 730 states and 1170 transitions. [2022-07-20 22:38:06,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:06,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-20 22:38:06,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:06,445 INFO L225 Difference]: With dead ends: 730 [2022-07-20 22:38:06,445 INFO L226 Difference]: Without dead ends: 410 [2022-07-20 22:38:06,445 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 [2022-07-20 22:38:06,446 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 138 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:06,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-20 22:38:06,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2022-07-20 22:38:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6029411764705883) internal successors, (545), 340 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 545 transitions. [2022-07-20 22:38:06,451 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 545 transitions. Word has length 120 [2022-07-20 22:38:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:06,452 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 545 transitions. [2022-07-20 22:38:06,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:06,452 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 545 transitions. [2022-07-20 22:38:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-20 22:38:06,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:06,453 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, 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] [2022-07-20 22:38:06,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:38:06,453 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:06,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1985043260, now seen corresponding path program 1 times [2022-07-20 22:38:06,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:06,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995677588] [2022-07-20 22:38:06,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:06,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-20 22:38:06,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:06,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995677588] [2022-07-20 22:38:06,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995677588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:06,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:06,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736303306] [2022-07-20 22:38:06,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:06,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:06,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:06,529 INFO L87 Difference]: Start difference. First operand 341 states and 545 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:08,544 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 [] [2022-07-20 22:38:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:08,724 INFO L93 Difference]: Finished difference Result 679 states and 1090 transitions. [2022-07-20 22:38:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:08,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-20 22:38:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:08,726 INFO L225 Difference]: With dead ends: 679 [2022-07-20 22:38:08,726 INFO L226 Difference]: Without dead ends: 359 [2022-07-20 22:38:08,726 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 [2022-07-20 22:38:08,727 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 35 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:08,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 469 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:38:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-20 22:38:08,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 341. [2022-07-20 22:38:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6) internal successors, (544), 340 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 544 transitions. [2022-07-20 22:38:08,733 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 544 transitions. Word has length 120 [2022-07-20 22:38:08,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:08,733 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 544 transitions. [2022-07-20 22:38:08,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 544 transitions. [2022-07-20 22:38:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-20 22:38:08,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:08,734 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:08,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 22:38:08,734 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:08,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1586861309, now seen corresponding path program 1 times [2022-07-20 22:38:08,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:08,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517293451] [2022-07-20 22:38:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:08,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 22:38:08,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:08,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517293451] [2022-07-20 22:38:08,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517293451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:08,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:08,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:08,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824257064] [2022-07-20 22:38:08,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:08,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:08,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:08,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:08,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:08,851 INFO L87 Difference]: Start difference. First operand 341 states and 544 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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) [2022-07-20 22:38:10,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:11,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:11,032 INFO L93 Difference]: Finished difference Result 679 states and 1088 transitions. [2022-07-20 22:38:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:11,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 121 [2022-07-20 22:38:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:11,035 INFO L225 Difference]: With dead ends: 679 [2022-07-20 22:38:11,035 INFO L226 Difference]: Without dead ends: 359 [2022-07-20 22:38:11,036 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 [2022-07-20 22:38:11,039 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 39 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:11,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 469 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:38:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-20 22:38:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 341. [2022-07-20 22:38:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.5970588235294119) internal successors, (543), 340 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 543 transitions. [2022-07-20 22:38:11,046 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 543 transitions. Word has length 121 [2022-07-20 22:38:11,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:11,046 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 543 transitions. [2022-07-20 22:38:11,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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) [2022-07-20 22:38:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 543 transitions. [2022-07-20 22:38:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-20 22:38:11,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:11,047 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:11,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 22:38:11,048 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1735358010, now seen corresponding path program 1 times [2022-07-20 22:38:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:11,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979242631] [2022-07-20 22:38:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:11,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 22:38:11,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:11,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979242631] [2022-07-20 22:38:11,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979242631] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:11,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:11,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:11,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641889693] [2022-07-20 22:38:11,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:11,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:11,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:11,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:11,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:11,158 INFO L87 Difference]: Start difference. First operand 341 states and 543 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2022-07-20 22:38:13,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:13,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:13,452 INFO L93 Difference]: Finished difference Result 730 states and 1154 transitions. [2022-07-20 22:38:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:13,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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 122 [2022-07-20 22:38:13,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:13,454 INFO L225 Difference]: With dead ends: 730 [2022-07-20 22:38:13,454 INFO L226 Difference]: Without dead ends: 410 [2022-07-20 22:38:13,454 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 [2022-07-20 22:38:13,455 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 135 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:13,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 318 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-20 22:38:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2022-07-20 22:38:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.5794117647058823) internal successors, (537), 340 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 537 transitions. [2022-07-20 22:38:13,460 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 537 transitions. Word has length 122 [2022-07-20 22:38:13,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:13,460 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 537 transitions. [2022-07-20 22:38:13,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2022-07-20 22:38:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 537 transitions. [2022-07-20 22:38:13,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-20 22:38:13,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:13,461 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:13,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 22:38:13,462 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:13,462 INFO L85 PathProgramCache]: Analyzing trace with hash 2093537762, now seen corresponding path program 1 times [2022-07-20 22:38:13,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:13,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838326434] [2022-07-20 22:38:13,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:13,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 22:38:13,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:13,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838326434] [2022-07-20 22:38:13,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838326434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:13,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:13,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710879449] [2022-07-20 22:38:13,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:13,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:13,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:13,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:13,550 INFO L87 Difference]: Start difference. First operand 341 states and 537 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:15,567 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:15,736 INFO L93 Difference]: Finished difference Result 669 states and 1061 transitions. [2022-07-20 22:38:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:15,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-07-20 22:38:15,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:15,739 INFO L225 Difference]: With dead ends: 669 [2022-07-20 22:38:15,739 INFO L226 Difference]: Without dead ends: 349 [2022-07-20 22:38:15,740 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 [2022-07-20 22:38:15,740 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 28 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:15,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 483 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:38:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-20 22:38:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 341. [2022-07-20 22:38:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.576470588235294) internal successors, (536), 340 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 536 transitions. [2022-07-20 22:38:15,745 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 536 transitions. Word has length 123 [2022-07-20 22:38:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:15,745 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 536 transitions. [2022-07-20 22:38:15,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 536 transitions. [2022-07-20 22:38:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-20 22:38:15,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:15,746 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:15,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 22:38:15,747 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:15,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:15,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1960687741, now seen corresponding path program 1 times [2022-07-20 22:38:15,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:15,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790727413] [2022-07-20 22:38:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:15,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 22:38:15,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:15,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790727413] [2022-07-20 22:38:15,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790727413] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:15,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:15,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:15,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191136949] [2022-07-20 22:38:15,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:15,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:15,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:15,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:15,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:15,846 INFO L87 Difference]: Start difference. First operand 341 states and 536 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) [2022-07-20 22:38:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:15,866 INFO L93 Difference]: Finished difference Result 975 states and 1552 transitions. [2022-07-20 22:38:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:15,867 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 127 [2022-07-20 22:38:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:15,869 INFO L225 Difference]: With dead ends: 975 [2022-07-20 22:38:15,869 INFO L226 Difference]: Without dead ends: 655 [2022-07-20 22:38:15,869 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 [2022-07-20 22:38:15,872 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 134 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:15,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 550 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:38:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-07-20 22:38:15,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2022-07-20 22:38:15,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.584097859327217) internal successors, (1036), 654 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1036 transitions. [2022-07-20 22:38:15,890 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1036 transitions. Word has length 127 [2022-07-20 22:38:15,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:15,890 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 1036 transitions. [2022-07-20 22:38:15,890 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) [2022-07-20 22:38:15,890 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1036 transitions. [2022-07-20 22:38:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-20 22:38:15,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:15,892 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:15,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-20 22:38:15,892 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:15,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:15,893 INFO L85 PathProgramCache]: Analyzing trace with hash -88700101, now seen corresponding path program 1 times [2022-07-20 22:38:15,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:15,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641001498] [2022-07-20 22:38:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:15,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:38:15,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:15,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641001498] [2022-07-20 22:38:15,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641001498] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:15,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:15,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:15,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819058711] [2022-07-20 22:38:15,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:15,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:15,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:15,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:15,985 INFO L87 Difference]: Start difference. First operand 655 states and 1036 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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) [2022-07-20 22:38:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:16,007 INFO L93 Difference]: Finished difference Result 1562 states and 2482 transitions. [2022-07-20 22:38:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:16,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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 [2022-07-20 22:38:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:16,010 INFO L225 Difference]: With dead ends: 1562 [2022-07-20 22:38:16,010 INFO L226 Difference]: Without dead ends: 928 [2022-07-20 22:38:16,011 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 [2022-07-20 22:38:16,012 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 136 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:16,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 428 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:38:16,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-07-20 22:38:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-07-20 22:38:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.581445523193096) internal successors, (1466), 927 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1466 transitions. [2022-07-20 22:38:16,029 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1466 transitions. Word has length 127 [2022-07-20 22:38:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:16,029 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1466 transitions. [2022-07-20 22:38:16,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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) [2022-07-20 22:38:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1466 transitions. [2022-07-20 22:38:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-20 22:38:16,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:16,031 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, 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] [2022-07-20 22:38:16,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 22:38:16,031 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 859220644, now seen corresponding path program 1 times [2022-07-20 22:38:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573131230] [2022-07-20 22:38:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 22:38:16,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:16,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573131230] [2022-07-20 22:38:16,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573131230] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:16,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:16,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:16,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510323473] [2022-07-20 22:38:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:16,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:16,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:16,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:16,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:16,188 INFO L87 Difference]: Start difference. First operand 928 states and 1466 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:16,216 INFO L93 Difference]: Finished difference Result 1862 states and 2944 transitions. [2022-07-20 22:38:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-07-20 22:38:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:16,219 INFO L225 Difference]: With dead ends: 1862 [2022-07-20 22:38:16,219 INFO L226 Difference]: Without dead ends: 955 [2022-07-20 22:38:16,220 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 [2022-07-20 22:38:16,220 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:16,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 400 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:38:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-07-20 22:38:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 955. [2022-07-20 22:38:16,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 1.5733752620545074) internal successors, (1501), 954 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1501 transitions. [2022-07-20 22:38:16,252 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1501 transitions. Word has length 128 [2022-07-20 22:38:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:16,252 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 1501 transitions. [2022-07-20 22:38:16,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1501 transitions. [2022-07-20 22:38:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-20 22:38:16,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:16,255 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, 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] [2022-07-20 22:38:16,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 22:38:16,255 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:16,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:16,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1282639834, now seen corresponding path program 1 times [2022-07-20 22:38:16,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:16,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051027490] [2022-07-20 22:38:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:16,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-20 22:38:16,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:16,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051027490] [2022-07-20 22:38:16,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051027490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:16,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:16,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:16,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457395177] [2022-07-20 22:38:16,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:16,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:16,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:16,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:16,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:16,350 INFO L87 Difference]: Start difference. First operand 955 states and 1501 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:16,364 INFO L93 Difference]: Finished difference Result 1891 states and 2980 transitions. [2022-07-20 22:38:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:16,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-07-20 22:38:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:16,367 INFO L225 Difference]: With dead ends: 1891 [2022-07-20 22:38:16,367 INFO L226 Difference]: Without dead ends: 957 [2022-07-20 22:38:16,368 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 [2022-07-20 22:38:16,368 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:16,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 379 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:38:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-07-20 22:38:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 957. [2022-07-20 22:38:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 1.5721757322175731) internal successors, (1503), 956 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1503 transitions. [2022-07-20 22:38:16,382 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1503 transitions. Word has length 128 [2022-07-20 22:38:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:16,383 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1503 transitions. [2022-07-20 22:38:16,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1503 transitions. [2022-07-20 22:38:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-20 22:38:16,385 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:16,385 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:16,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 22:38:16,385 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:16,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1581011726, now seen corresponding path program 1 times [2022-07-20 22:38:16,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:16,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585140200] [2022-07-20 22:38:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:16,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 211 proven. 34 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-20 22:38:16,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:16,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585140200] [2022-07-20 22:38:16,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585140200] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:38:16,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345969922] [2022-07-20 22:38:16,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:16,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:38:16,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:38:16,506 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) [2022-07-20 22:38:16,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:38:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:17,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 22:38:17,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:38:17,125 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:38:17,125 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 [2022-07-20 22:38:17,158 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:38:17,159 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 [2022-07-20 22:38:17,193 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:38:17,194 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 [2022-07-20 22:38:17,235 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 [2022-07-20 22:38:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 212 proven. 32 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-20 22:38:17,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:38:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-20 22:38:17,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345969922] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:38:17,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:38:17,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 11 [2022-07-20 22:38:17,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911425076] [2022-07-20 22:38:17,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:17,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:17,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:38:17,304 INFO L87 Difference]: Start difference. First operand 957 states and 1503 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:19,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:19,604 INFO L93 Difference]: Finished difference Result 2165 states and 3381 transitions. [2022-07-20 22:38:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:19,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 191 [2022-07-20 22:38:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:19,608 INFO L225 Difference]: With dead ends: 2165 [2022-07-20 22:38:19,608 INFO L226 Difference]: Without dead ends: 1231 [2022-07-20 22:38:19,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:38:19,609 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 97 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:19,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 421 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:19,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-07-20 22:38:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1023. [2022-07-20 22:38:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.5626223091976517) internal successors, (1597), 1022 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1597 transitions. [2022-07-20 22:38:19,631 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1597 transitions. Word has length 191 [2022-07-20 22:38:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:19,631 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1597 transitions. [2022-07-20 22:38:19,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1597 transitions. [2022-07-20 22:38:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-20 22:38:19,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:19,633 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:19,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 22:38:19,854 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,SelfDestructingSolverStorable26 [2022-07-20 22:38:19,854 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:19,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash 893611286, now seen corresponding path program 1 times [2022-07-20 22:38:19,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:19,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982845184] [2022-07-20 22:38:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:19,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-20 22:38:19,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:19,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982845184] [2022-07-20 22:38:19,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982845184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:19,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:19,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:19,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347717539] [2022-07-20 22:38:19,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:19,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:19,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:19,962 INFO L87 Difference]: Start difference. First operand 1023 states and 1597 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:21,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:21,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:21,895 INFO L93 Difference]: Finished difference Result 2116 states and 3285 transitions. [2022-07-20 22:38:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:21,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 192 [2022-07-20 22:38:21,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:21,906 INFO L225 Difference]: With dead ends: 2116 [2022-07-20 22:38:21,906 INFO L226 Difference]: Without dead ends: 1116 [2022-07-20 22:38:21,907 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 [2022-07-20 22:38:21,908 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 88 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:21,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 600 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-20 22:38:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-07-20 22:38:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1023. [2022-07-20 22:38:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.560665362035225) internal successors, (1595), 1022 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1595 transitions. [2022-07-20 22:38:21,925 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1595 transitions. Word has length 192 [2022-07-20 22:38:21,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:21,925 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1595 transitions. [2022-07-20 22:38:21,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1595 transitions. [2022-07-20 22:38:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-07-20 22:38:21,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:21,927 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:21,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 22:38:21,928 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:21,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1597975272, now seen corresponding path program 1 times [2022-07-20 22:38:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:21,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400580860] [2022-07-20 22:38:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:21,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:38:22,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400580860] [2022-07-20 22:38:22,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400580860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:22,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:22,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:22,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687839810] [2022-07-20 22:38:22,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:22,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:22,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:22,025 INFO L87 Difference]: Start difference. First operand 1023 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:24,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:24,307 INFO L93 Difference]: Finished difference Result 2289 states and 3557 transitions. [2022-07-20 22:38:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:24,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 205 [2022-07-20 22:38:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:24,311 INFO L225 Difference]: With dead ends: 2289 [2022-07-20 22:38:24,311 INFO L226 Difference]: Without dead ends: 1289 [2022-07-20 22:38:24,312 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 [2022-07-20 22:38:24,315 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 90 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:24,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 615 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 266 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-07-20 22:38:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1023. [2022-07-20 22:38:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.560665362035225) internal successors, (1595), 1022 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1595 transitions. [2022-07-20 22:38:24,363 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1595 transitions. Word has length 205 [2022-07-20 22:38:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:24,363 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1595 transitions. [2022-07-20 22:38:24,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1595 transitions. [2022-07-20 22:38:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-20 22:38:24,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:24,366 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:24,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-20 22:38:24,367 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:24,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2144107753, now seen corresponding path program 1 times [2022-07-20 22:38:24,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:24,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538452303] [2022-07-20 22:38:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:24,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 238 proven. 14 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-20 22:38:24,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538452303] [2022-07-20 22:38:24,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538452303] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:38:24,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107068145] [2022-07-20 22:38:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:24,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:38:24,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:38:24,480 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) [2022-07-20 22:38:24,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:38:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:25,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:38:25,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:38:25,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-07-20 22:38:25,079 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-07-20 22:38:25,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-07-20 22:38:25,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-20 22:38:25,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-20 22:38:25,325 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-20 22:38:25,326 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 21 [2022-07-20 22:38:25,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-20 22:38:25,363 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 [2022-07-20 22:38:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-20 22:38:25,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:38:25,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107068145] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:25,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:38:25,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-07-20 22:38:25,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216167640] [2022-07-20 22:38:25,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:25,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:25,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:25,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:25,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:38:25,376 INFO L87 Difference]: Start difference. First operand 1023 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:27,383 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 [] [2022-07-20 22:38:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:27,677 INFO L93 Difference]: Finished difference Result 2247 states and 3494 transitions. [2022-07-20 22:38:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:27,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-07-20 22:38:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:27,680 INFO L225 Difference]: With dead ends: 2247 [2022-07-20 22:38:27,680 INFO L226 Difference]: Without dead ends: 1247 [2022-07-20 22:38:27,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:38:27,682 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 91 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:27,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 613 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:27,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-07-20 22:38:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1023. [2022-07-20 22:38:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.560665362035225) internal successors, (1595), 1022 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1595 transitions. [2022-07-20 22:38:27,699 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1595 transitions. Word has length 206 [2022-07-20 22:38:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:27,699 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1595 transitions. [2022-07-20 22:38:27,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1595 transitions. [2022-07-20 22:38:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-20 22:38:27,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:27,701 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:27,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:38:27,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:38:27,915 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:27,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:27,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1129262156, now seen corresponding path program 1 times [2022-07-20 22:38:27,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:27,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559396025] [2022-07-20 22:38:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:27,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:38:28,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:28,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559396025] [2022-07-20 22:38:28,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559396025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:28,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:28,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:28,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301507474] [2022-07-20 22:38:28,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:28,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:28,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:28,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:28,036 INFO L87 Difference]: Start difference. First operand 1023 states and 1595 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) [2022-07-20 22:38:30,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:30,341 INFO L93 Difference]: Finished difference Result 2276 states and 3537 transitions. [2022-07-20 22:38:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:30,342 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 206 [2022-07-20 22:38:30,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:30,345 INFO L225 Difference]: With dead ends: 2276 [2022-07-20 22:38:30,345 INFO L226 Difference]: Without dead ends: 1276 [2022-07-20 22:38:30,346 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 [2022-07-20 22:38:30,346 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 82 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:30,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 603 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-07-20 22:38:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1092. [2022-07-20 22:38:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5554537121906509) internal successors, (1697), 1091 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1697 transitions. [2022-07-20 22:38:30,366 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1697 transitions. Word has length 206 [2022-07-20 22:38:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:30,367 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1697 transitions. [2022-07-20 22:38:30,367 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) [2022-07-20 22:38:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1697 transitions. [2022-07-20 22:38:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-20 22:38:30,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:30,369 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:30,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-20 22:38:30,369 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:30,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:30,370 INFO L85 PathProgramCache]: Analyzing trace with hash 402251252, now seen corresponding path program 1 times [2022-07-20 22:38:30,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:30,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636723594] [2022-07-20 22:38:30,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:30,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 22:38:30,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:30,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636723594] [2022-07-20 22:38:30,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636723594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:30,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:30,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:30,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718809692] [2022-07-20 22:38:30,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:30,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:30,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:30,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:30,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:30,460 INFO L87 Difference]: Start difference. First operand 1092 states and 1697 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:32,467 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 [] [2022-07-20 22:38:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:32,773 INFO L93 Difference]: Finished difference Result 2254 states and 3485 transitions. [2022-07-20 22:38:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 207 [2022-07-20 22:38:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:32,776 INFO L225 Difference]: With dead ends: 2254 [2022-07-20 22:38:32,776 INFO L226 Difference]: Without dead ends: 1185 [2022-07-20 22:38:32,778 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 [2022-07-20 22:38:32,778 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 97 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:32,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 598 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-20 22:38:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1092. [2022-07-20 22:38:32,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5536205316223648) internal successors, (1695), 1091 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1695 transitions. [2022-07-20 22:38:32,797 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1695 transitions. Word has length 207 [2022-07-20 22:38:32,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:32,797 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1695 transitions. [2022-07-20 22:38:32,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1695 transitions. [2022-07-20 22:38:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-20 22:38:32,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:32,799 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:32,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-20 22:38:32,799 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1128334472, now seen corresponding path program 1 times [2022-07-20 22:38:32,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:32,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523660222] [2022-07-20 22:38:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:32,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 22:38:32,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:32,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523660222] [2022-07-20 22:38:32,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523660222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:32,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:32,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:32,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691435879] [2022-07-20 22:38:32,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:32,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:32,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:32,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:32,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:32,899 INFO L87 Difference]: Start difference. First operand 1092 states and 1695 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:34,912 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 [] [2022-07-20 22:38:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:35,210 INFO L93 Difference]: Finished difference Result 2254 states and 3481 transitions. [2022-07-20 22:38:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:35,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 208 [2022-07-20 22:38:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:35,213 INFO L225 Difference]: With dead ends: 2254 [2022-07-20 22:38:35,213 INFO L226 Difference]: Without dead ends: 1185 [2022-07-20 22:38:35,214 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 [2022-07-20 22:38:35,215 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 90 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:35,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 596 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-20 22:38:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1092. [2022-07-20 22:38:35,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5517873510540787) internal successors, (1693), 1091 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1693 transitions. [2022-07-20 22:38:35,232 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1693 transitions. Word has length 208 [2022-07-20 22:38:35,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:35,232 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1693 transitions. [2022-07-20 22:38:35,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1693 transitions. [2022-07-20 22:38:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-07-20 22:38:35,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:35,234 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:35,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-20 22:38:35,235 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1932227823, now seen corresponding path program 1 times [2022-07-20 22:38:35,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:35,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748113225] [2022-07-20 22:38:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:35,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 22:38:35,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:35,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748113225] [2022-07-20 22:38:35,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748113225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:35,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:35,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:35,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333942157] [2022-07-20 22:38:35,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:35,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:35,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:35,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:35,325 INFO L87 Difference]: Start difference. First operand 1092 states and 1693 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:37,339 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 [] [2022-07-20 22:38:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:37,596 INFO L93 Difference]: Finished difference Result 2234 states and 3451 transitions. [2022-07-20 22:38:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:37,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 209 [2022-07-20 22:38:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:37,599 INFO L225 Difference]: With dead ends: 2234 [2022-07-20 22:38:37,599 INFO L226 Difference]: Without dead ends: 1165 [2022-07-20 22:38:37,600 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 [2022-07-20 22:38:37,601 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 86 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:37,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 582 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:38:37,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-07-20 22:38:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1092. [2022-07-20 22:38:37,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5499541704857929) internal successors, (1691), 1091 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1691 transitions. [2022-07-20 22:38:37,617 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1691 transitions. Word has length 209 [2022-07-20 22:38:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:37,617 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1691 transitions. [2022-07-20 22:38:37,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1691 transitions. [2022-07-20 22:38:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-07-20 22:38:37,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:37,619 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 22:38:37,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-20 22:38:37,619 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:37,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:37,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1406253003, now seen corresponding path program 1 times [2022-07-20 22:38:37,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:37,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035188564] [2022-07-20 22:38:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:37,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 22:38:37,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:37,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035188564] [2022-07-20 22:38:37,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035188564] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:37,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:37,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:37,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740683874] [2022-07-20 22:38:37,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:37,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:37,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:37,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:37,718 INFO L87 Difference]: Start difference. First operand 1092 states and 1691 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:39,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:39,967 INFO L93 Difference]: Finished difference Result 2234 states and 3447 transitions. [2022-07-20 22:38:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 209 [2022-07-20 22:38:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:39,970 INFO L225 Difference]: With dead ends: 2234 [2022-07-20 22:38:39,970 INFO L226 Difference]: Without dead ends: 1165 [2022-07-20 22:38:39,971 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 [2022-07-20 22:38:39,971 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 80 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:39,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 580 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:38:39,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-07-20 22:38:39,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1092. [2022-07-20 22:38:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5481209899175068) internal successors, (1689), 1091 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1689 transitions. [2022-07-20 22:38:39,986 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1689 transitions. Word has length 209 [2022-07-20 22:38:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:39,986 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1689 transitions. [2022-07-20 22:38:39,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1689 transitions. [2022-07-20 22:38:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-20 22:38:39,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:39,989 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 22:38:39,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-20 22:38:39,989 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:39,989 INFO L85 PathProgramCache]: Analyzing trace with hash 266712989, now seen corresponding path program 1 times [2022-07-20 22:38:39,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:39,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432548408] [2022-07-20 22:38:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:39,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 22:38:40,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:40,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432548408] [2022-07-20 22:38:40,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432548408] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:40,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:40,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:40,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091614812] [2022-07-20 22:38:40,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:40,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:40,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:40,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:40,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:40,074 INFO L87 Difference]: Start difference. First operand 1092 states and 1689 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) [2022-07-20 22:38:41,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:42,133 INFO L93 Difference]: Finished difference Result 2227 states and 3435 transitions. [2022-07-20 22:38:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:42,133 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 210 [2022-07-20 22:38:42,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:42,136 INFO L225 Difference]: With dead ends: 2227 [2022-07-20 22:38:42,136 INFO L226 Difference]: Without dead ends: 1158 [2022-07-20 22:38:42,137 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 [2022-07-20 22:38:42,137 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 76 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:42,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 574 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 22:38:42,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-07-20 22:38:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1092. [2022-07-20 22:38:42,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.546287809349221) internal successors, (1687), 1091 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1687 transitions. [2022-07-20 22:38:42,153 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1687 transitions. Word has length 210 [2022-07-20 22:38:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:42,153 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1687 transitions. [2022-07-20 22:38:42,154 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) [2022-07-20 22:38:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1687 transitions. [2022-07-20 22:38:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-07-20 22:38:42,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:42,156 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:42,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-20 22:38:42,156 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:42,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash 166579950, now seen corresponding path program 1 times [2022-07-20 22:38:42,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:42,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566725987] [2022-07-20 22:38:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:42,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:38:42,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:42,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566725987] [2022-07-20 22:38:42,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566725987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:42,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:42,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:42,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79626959] [2022-07-20 22:38:42,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:42,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:42,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:42,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:42,250 INFO L87 Difference]: Start difference. First operand 1092 states and 1687 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:44,263 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 [] [2022-07-20 22:38:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:44,560 INFO L93 Difference]: Finished difference Result 2444 states and 3751 transitions. [2022-07-20 22:38:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:44,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 214 [2022-07-20 22:38:44,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:44,563 INFO L225 Difference]: With dead ends: 2444 [2022-07-20 22:38:44,563 INFO L226 Difference]: Without dead ends: 1375 [2022-07-20 22:38:44,564 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 [2022-07-20 22:38:44,565 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 123 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:44,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 314 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-07-20 22:38:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1140. [2022-07-20 22:38:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5364354697102722) internal successors, (1750), 1139 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1750 transitions. [2022-07-20 22:38:44,581 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1750 transitions. Word has length 214 [2022-07-20 22:38:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:44,581 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1750 transitions. [2022-07-20 22:38:44,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1750 transitions. [2022-07-20 22:38:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-20 22:38:44,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:44,583 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:44,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-20 22:38:44,584 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1870434490, now seen corresponding path program 1 times [2022-07-20 22:38:44,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:44,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424498416] [2022-07-20 22:38:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:44,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:38:44,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:44,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424498416] [2022-07-20 22:38:44,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424498416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:44,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:44,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:44,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637500139] [2022-07-20 22:38:44,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:44,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:44,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:44,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:44,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:44,676 INFO L87 Difference]: Start difference. First operand 1140 states and 1750 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:46,687 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 [] [2022-07-20 22:38:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:46,930 INFO L93 Difference]: Finished difference Result 2315 states and 3547 transitions. [2022-07-20 22:38:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:46,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 215 [2022-07-20 22:38:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:46,933 INFO L225 Difference]: With dead ends: 2315 [2022-07-20 22:38:46,933 INFO L226 Difference]: Without dead ends: 1198 [2022-07-20 22:38:46,934 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 [2022-07-20 22:38:46,935 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 66 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:46,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 564 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:38:46,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-07-20 22:38:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1140. [2022-07-20 22:38:46,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5346795434591747) internal successors, (1748), 1139 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1748 transitions. [2022-07-20 22:38:46,968 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1748 transitions. Word has length 215 [2022-07-20 22:38:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:46,968 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1748 transitions. [2022-07-20 22:38:46,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1748 transitions. [2022-07-20 22:38:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-07-20 22:38:46,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:46,970 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:46,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-20 22:38:46,970 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:46,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:46,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1365737855, now seen corresponding path program 1 times [2022-07-20 22:38:46,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:46,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166218420] [2022-07-20 22:38:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:46,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:38:47,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:47,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166218420] [2022-07-20 22:38:47,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166218420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:47,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:47,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:47,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576189479] [2022-07-20 22:38:47,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:47,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:47,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:47,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:47,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:47,054 INFO L87 Difference]: Start difference. First operand 1140 states and 1748 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:49,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:49,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:49,322 INFO L93 Difference]: Finished difference Result 2315 states and 3543 transitions. [2022-07-20 22:38:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:49,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 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 217 [2022-07-20 22:38:49,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:49,328 INFO L225 Difference]: With dead ends: 2315 [2022-07-20 22:38:49,331 INFO L226 Difference]: Without dead ends: 1198 [2022-07-20 22:38:49,332 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 [2022-07-20 22:38:49,333 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 62 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:49,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 562 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:38:49,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-07-20 22:38:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1140. [2022-07-20 22:38:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5329236172080773) internal successors, (1746), 1139 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1746 transitions. [2022-07-20 22:38:49,352 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1746 transitions. Word has length 217 [2022-07-20 22:38:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:49,352 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1746 transitions. [2022-07-20 22:38:49,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1746 transitions. [2022-07-20 22:38:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-20 22:38:49,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:49,355 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:49,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-20 22:38:49,355 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:49,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:49,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1697536105, now seen corresponding path program 1 times [2022-07-20 22:38:49,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:49,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810034754] [2022-07-20 22:38:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:49,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:38:49,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:49,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810034754] [2022-07-20 22:38:49,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810034754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:49,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:49,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:49,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291529174] [2022-07-20 22:38:49,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:49,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:49,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:49,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:49,447 INFO L87 Difference]: Start difference. First operand 1140 states and 1746 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:51,454 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 [] [2022-07-20 22:38:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:51,733 INFO L93 Difference]: Finished difference Result 2456 states and 3729 transitions. [2022-07-20 22:38:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:51,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 218 [2022-07-20 22:38:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:51,735 INFO L225 Difference]: With dead ends: 2456 [2022-07-20 22:38:51,735 INFO L226 Difference]: Without dead ends: 1339 [2022-07-20 22:38:51,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:38:51,737 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 118 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:51,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 304 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2022-07-20 22:38:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1140. [2022-07-20 22:38:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5232660228270412) internal successors, (1735), 1139 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1735 transitions. [2022-07-20 22:38:51,753 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1735 transitions. Word has length 218 [2022-07-20 22:38:51,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:51,753 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1735 transitions. [2022-07-20 22:38:51,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:51,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1735 transitions. [2022-07-20 22:38:51,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-20 22:38:51,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:51,756 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:51,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-20 22:38:51,756 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:51,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:51,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1226059139, now seen corresponding path program 1 times [2022-07-20 22:38:51,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:51,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697295157] [2022-07-20 22:38:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:51,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 22:38:51,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:51,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697295157] [2022-07-20 22:38:51,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697295157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:51,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:51,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:51,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893028977] [2022-07-20 22:38:51,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:51,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:51,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:51,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:51,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:51,852 INFO L87 Difference]: Start difference. First operand 1140 states and 1735 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:53,863 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 [] [2022-07-20 22:38:54,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:54,082 INFO L93 Difference]: Finished difference Result 2299 states and 3491 transitions. [2022-07-20 22:38:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:54,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 218 [2022-07-20 22:38:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:54,084 INFO L225 Difference]: With dead ends: 2299 [2022-07-20 22:38:54,085 INFO L226 Difference]: Without dead ends: 1182 [2022-07-20 22:38:54,086 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 [2022-07-20 22:38:54,086 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 49 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:54,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 550 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:38:54,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-07-20 22:38:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1140. [2022-07-20 22:38:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5215100965759438) internal successors, (1733), 1139 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1733 transitions. [2022-07-20 22:38:54,102 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1733 transitions. Word has length 218 [2022-07-20 22:38:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:54,103 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1733 transitions. [2022-07-20 22:38:54,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1733 transitions. [2022-07-20 22:38:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-20 22:38:54,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:54,105 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:54,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-20 22:38:54,105 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:54,105 INFO L85 PathProgramCache]: Analyzing trace with hash 306712821, now seen corresponding path program 1 times [2022-07-20 22:38:54,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:54,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813385189] [2022-07-20 22:38:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:54,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 306 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 22:38:54,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:54,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813385189] [2022-07-20 22:38:54,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813385189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:54,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:54,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:54,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45330317] [2022-07-20 22:38:54,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:54,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:54,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:54,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:54,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:54,211 INFO L87 Difference]: Start difference. First operand 1140 states and 1733 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) [2022-07-20 22:38:56,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:56,428 INFO L93 Difference]: Finished difference Result 2295 states and 3483 transitions. [2022-07-20 22:38:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:56,428 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 219 [2022-07-20 22:38:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:56,430 INFO L225 Difference]: With dead ends: 2295 [2022-07-20 22:38:56,430 INFO L226 Difference]: Without dead ends: 1178 [2022-07-20 22:38:56,431 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 [2022-07-20 22:38:56,431 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 46 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:56,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 546 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:38:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-07-20 22:38:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1140. [2022-07-20 22:38:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5197541703248463) internal successors, (1731), 1139 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1731 transitions. [2022-07-20 22:38:56,447 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1731 transitions. Word has length 219 [2022-07-20 22:38:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:56,447 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1731 transitions. [2022-07-20 22:38:56,447 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) [2022-07-20 22:38:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1731 transitions. [2022-07-20 22:38:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-07-20 22:38:56,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:56,449 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:56,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-20 22:38:56,449 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:56,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:56,450 INFO L85 PathProgramCache]: Analyzing trace with hash -331325385, now seen corresponding path program 1 times [2022-07-20 22:38:56,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:56,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693499668] [2022-07-20 22:38:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:56,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:38:56,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:56,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693499668] [2022-07-20 22:38:56,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693499668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:56,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:56,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:56,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009580190] [2022-07-20 22:38:56,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:56,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:56,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:56,537 INFO L87 Difference]: Start difference. First operand 1140 states and 1731 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) [2022-07-20 22:38:58,551 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 [] [2022-07-20 22:38:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:58,751 INFO L93 Difference]: Finished difference Result 2295 states and 3479 transitions. [2022-07-20 22:38:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:58,751 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 220 [2022-07-20 22:38:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:58,753 INFO L225 Difference]: With dead ends: 2295 [2022-07-20 22:38:58,753 INFO L226 Difference]: Without dead ends: 1178 [2022-07-20 22:38:58,754 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 [2022-07-20 22:38:58,755 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 50 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:58,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 544 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:38:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-07-20 22:38:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1140. [2022-07-20 22:38:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.517998244073749) internal successors, (1729), 1139 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1729 transitions. [2022-07-20 22:38:58,770 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1729 transitions. Word has length 220 [2022-07-20 22:38:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:58,770 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1729 transitions. [2022-07-20 22:38:58,770 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) [2022-07-20 22:38:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1729 transitions. [2022-07-20 22:38:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-20 22:38:58,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:58,772 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:58,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-20 22:38:58,772 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:58,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:58,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1004342270, now seen corresponding path program 1 times [2022-07-20 22:38:58,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:58,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456211804] [2022-07-20 22:38:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:58,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 22:38:58,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:58,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456211804] [2022-07-20 22:38:58,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456211804] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:58,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:58,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:58,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326492518] [2022-07-20 22:38:58,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:58,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:58,881 INFO L87 Difference]: Start difference. First operand 1140 states and 1729 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:00,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:01,137 INFO L93 Difference]: Finished difference Result 2441 states and 3694 transitions. [2022-07-20 22:39:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:01,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 221 [2022-07-20 22:39:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:01,139 INFO L225 Difference]: With dead ends: 2441 [2022-07-20 22:39:01,139 INFO L226 Difference]: Without dead ends: 1324 [2022-07-20 22:39:01,140 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 [2022-07-20 22:39:01,140 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 89 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:01,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 597 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:39:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-07-20 22:39:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1140. [2022-07-20 22:39:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5153643546971027) internal successors, (1726), 1139 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1726 transitions. [2022-07-20 22:39:01,155 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1726 transitions. Word has length 221 [2022-07-20 22:39:01,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:01,155 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1726 transitions. [2022-07-20 22:39:01,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:01,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1726 transitions. [2022-07-20 22:39:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-20 22:39:01,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:01,157 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:01,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-20 22:39:01,157 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:01,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:01,158 INFO L85 PathProgramCache]: Analyzing trace with hash -855690769, now seen corresponding path program 1 times [2022-07-20 22:39:01,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:01,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190166500] [2022-07-20 22:39:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:01,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:39:01,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190166500] [2022-07-20 22:39:01,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190166500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:01,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:01,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:01,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946677701] [2022-07-20 22:39:01,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:01,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:01,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:01,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:01,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:01,239 INFO L87 Difference]: Start difference. First operand 1140 states and 1726 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) [2022-07-20 22:39:02,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:03,099 INFO L93 Difference]: Finished difference Result 2291 states and 3463 transitions. [2022-07-20 22:39:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:03,099 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 221 [2022-07-20 22:39:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:03,101 INFO L225 Difference]: With dead ends: 2291 [2022-07-20 22:39:03,101 INFO L226 Difference]: Without dead ends: 1174 [2022-07-20 22:39:03,101 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 [2022-07-20 22:39:03,102 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 47 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:03,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 542 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 22:39:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-07-20 22:39:03,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1140. [2022-07-20 22:39:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5136084284460052) internal successors, (1724), 1139 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1724 transitions. [2022-07-20 22:39:03,130 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1724 transitions. Word has length 221 [2022-07-20 22:39:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:03,130 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1724 transitions. [2022-07-20 22:39:03,130 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) [2022-07-20 22:39:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1724 transitions. [2022-07-20 22:39:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-20 22:39:03,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:03,132 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:03,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-20 22:39:03,132 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash 356617902, now seen corresponding path program 1 times [2022-07-20 22:39:03,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:03,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216699983] [2022-07-20 22:39:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:03,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 22:39:03,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:03,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216699983] [2022-07-20 22:39:03,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216699983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:03,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:03,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:03,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553292033] [2022-07-20 22:39:03,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:03,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:03,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:03,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:03,211 INFO L87 Difference]: Start difference. First operand 1140 states and 1724 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) [2022-07-20 22:39:05,217 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 [] [2022-07-20 22:39:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:05,477 INFO L93 Difference]: Finished difference Result 2441 states and 3684 transitions. [2022-07-20 22:39:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:05,477 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 222 [2022-07-20 22:39:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:05,479 INFO L225 Difference]: With dead ends: 2441 [2022-07-20 22:39:05,479 INFO L226 Difference]: Without dead ends: 1324 [2022-07-20 22:39:05,479 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 [2022-07-20 22:39:05,480 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 82 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:05,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 595 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:39:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-07-20 22:39:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1140. [2022-07-20 22:39:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5109745390693592) internal successors, (1721), 1139 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1721 transitions. [2022-07-20 22:39:05,497 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1721 transitions. Word has length 222 [2022-07-20 22:39:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:05,497 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1721 transitions. [2022-07-20 22:39:05,497 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) [2022-07-20 22:39:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1721 transitions. [2022-07-20 22:39:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-20 22:39:05,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:05,499 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:05,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-20 22:39:05,499 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:05,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:05,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2141757129, now seen corresponding path program 1 times [2022-07-20 22:39:05,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:05,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666993024] [2022-07-20 22:39:05,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:05,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 22:39:05,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:05,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666993024] [2022-07-20 22:39:05,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666993024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:05,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:05,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:05,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866259507] [2022-07-20 22:39:05,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:05,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:05,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:05,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:05,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:05,584 INFO L87 Difference]: Start difference. First operand 1140 states and 1721 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:07,595 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 [] [2022-07-20 22:39:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:07,889 INFO L93 Difference]: Finished difference Result 2582 states and 3889 transitions. [2022-07-20 22:39:07,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:07,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 222 [2022-07-20 22:39:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:07,892 INFO L225 Difference]: With dead ends: 2582 [2022-07-20 22:39:07,892 INFO L226 Difference]: Without dead ends: 1465 [2022-07-20 22:39:07,892 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 [2022-07-20 22:39:07,895 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 113 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:07,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:39:07,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2022-07-20 22:39:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1239. [2022-07-20 22:39:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5145395799676897) internal successors, (1875), 1238 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1875 transitions. [2022-07-20 22:39:07,919 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1875 transitions. Word has length 222 [2022-07-20 22:39:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:07,920 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1875 transitions. [2022-07-20 22:39:07,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1875 transitions. [2022-07-20 22:39:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-20 22:39:07,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:07,921 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:07,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-20 22:39:07,921 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:07,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:07,922 INFO L85 PathProgramCache]: Analyzing trace with hash 721111161, now seen corresponding path program 1 times [2022-07-20 22:39:07,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:07,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905920069] [2022-07-20 22:39:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:07,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 22:39:08,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:08,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905920069] [2022-07-20 22:39:08,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905920069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:08,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:08,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:08,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742409727] [2022-07-20 22:39:08,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:08,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:08,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:08,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:08,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:08,014 INFO L87 Difference]: Start difference. First operand 1239 states and 1875 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:10,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:10,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:10,284 INFO L93 Difference]: Finished difference Result 2609 states and 3944 transitions. [2022-07-20 22:39:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:10,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 223 [2022-07-20 22:39:10,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:10,286 INFO L225 Difference]: With dead ends: 2609 [2022-07-20 22:39:10,286 INFO L226 Difference]: Without dead ends: 1393 [2022-07-20 22:39:10,287 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 [2022-07-20 22:39:10,288 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 77 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:10,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 579 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:39:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-07-20 22:39:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1239. [2022-07-20 22:39:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5121163166397416) internal successors, (1872), 1238 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1872 transitions. [2022-07-20 22:39:10,307 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1872 transitions. Word has length 223 [2022-07-20 22:39:10,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:10,307 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1872 transitions. [2022-07-20 22:39:10,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1872 transitions. [2022-07-20 22:39:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-20 22:39:10,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:10,309 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 22:39:10,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-20 22:39:10,309 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:10,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1677597631, now seen corresponding path program 1 times [2022-07-20 22:39:10,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:10,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639237995] [2022-07-20 22:39:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:10,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 22:39:10,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:10,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639237995] [2022-07-20 22:39:10,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639237995] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:10,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:10,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:10,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927515079] [2022-07-20 22:39:10,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:10,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:10,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:10,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:10,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:10,422 INFO L87 Difference]: Start difference. First operand 1239 states and 1872 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:12,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:12,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:12,715 INFO L93 Difference]: Finished difference Result 2609 states and 3938 transitions. [2022-07-20 22:39:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:12,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 223 [2022-07-20 22:39:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:12,717 INFO L225 Difference]: With dead ends: 2609 [2022-07-20 22:39:12,717 INFO L226 Difference]: Without dead ends: 1393 [2022-07-20 22:39:12,718 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 [2022-07-20 22:39:12,720 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 71 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:12,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 577 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:39:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-07-20 22:39:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1239. [2022-07-20 22:39:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5096930533117932) internal successors, (1869), 1238 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1869 transitions. [2022-07-20 22:39:12,738 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1869 transitions. Word has length 223 [2022-07-20 22:39:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:12,738 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1869 transitions. [2022-07-20 22:39:12,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:12,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1869 transitions. [2022-07-20 22:39:12,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-20 22:39:12,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:12,741 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:12,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-20 22:39:12,741 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:12,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:12,741 INFO L85 PathProgramCache]: Analyzing trace with hash -265663596, now seen corresponding path program 1 times [2022-07-20 22:39:12,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:12,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647873123] [2022-07-20 22:39:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:12,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 22:39:12,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:12,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647873123] [2022-07-20 22:39:12,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647873123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:12,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:12,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:12,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576238176] [2022-07-20 22:39:12,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:12,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:12,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:12,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:12,829 INFO L87 Difference]: Start difference. First operand 1239 states and 1869 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) [2022-07-20 22:39:14,844 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 [] [2022-07-20 22:39:15,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:15,036 INFO L93 Difference]: Finished difference Result 2481 states and 3739 transitions. [2022-07-20 22:39:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:15,036 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 223 [2022-07-20 22:39:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:15,037 INFO L225 Difference]: With dead ends: 2481 [2022-07-20 22:39:15,038 INFO L226 Difference]: Without dead ends: 1265 [2022-07-20 22:39:15,038 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 [2022-07-20 22:39:15,039 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 35 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:15,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 532 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:39:15,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-07-20 22:39:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1239. [2022-07-20 22:39:15,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5080775444264944) internal successors, (1867), 1238 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1867 transitions. [2022-07-20 22:39:15,068 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1867 transitions. Word has length 223 [2022-07-20 22:39:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:15,069 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1867 transitions. [2022-07-20 22:39:15,069 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) [2022-07-20 22:39:15,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1867 transitions. [2022-07-20 22:39:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-20 22:39:15,071 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:15,071 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 22:39:15,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-20 22:39:15,071 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1376802131, now seen corresponding path program 1 times [2022-07-20 22:39:15,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:15,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4582484] [2022-07-20 22:39:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:15,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 22:39:15,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:15,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4582484] [2022-07-20 22:39:15,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4582484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:15,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:15,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:15,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489957783] [2022-07-20 22:39:15,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:15,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:15,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:15,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:15,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:15,161 INFO L87 Difference]: Start difference. First operand 1239 states and 1867 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:17,166 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:17,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:17,408 INFO L93 Difference]: Finished difference Result 2599 states and 3917 transitions. [2022-07-20 22:39:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:17,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2022-07-20 22:39:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:17,424 INFO L225 Difference]: With dead ends: 2599 [2022-07-20 22:39:17,425 INFO L226 Difference]: Without dead ends: 1383 [2022-07-20 22:39:17,426 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 [2022-07-20 22:39:17,426 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 67 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:17,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 571 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:39:17,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-07-20 22:39:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1239. [2022-07-20 22:39:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.505654281098546) internal successors, (1864), 1238 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1864 transitions. [2022-07-20 22:39:17,445 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1864 transitions. Word has length 224 [2022-07-20 22:39:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:17,446 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1864 transitions. [2022-07-20 22:39:17,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1864 transitions. [2022-07-20 22:39:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-20 22:39:17,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:17,448 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:17,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-20 22:39:17,449 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash -473713383, now seen corresponding path program 1 times [2022-07-20 22:39:17,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:17,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450589742] [2022-07-20 22:39:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:39:17,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:17,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450589742] [2022-07-20 22:39:17,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450589742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:17,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:17,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:17,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149389772] [2022-07-20 22:39:17,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:17,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:17,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:17,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:17,586 INFO L87 Difference]: Start difference. First operand 1239 states and 1864 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) [2022-07-20 22:39:18,632 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 [] [2022-07-20 22:39:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:18,826 INFO L93 Difference]: Finished difference Result 2481 states and 3729 transitions. [2022-07-20 22:39:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:18,826 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 224 [2022-07-20 22:39:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:18,828 INFO L225 Difference]: With dead ends: 2481 [2022-07-20 22:39:18,828 INFO L226 Difference]: Without dead ends: 1265 [2022-07-20 22:39:18,829 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 [2022-07-20 22:39:18,829 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 33 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:18,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 530 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 22:39:18,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-07-20 22:39:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1239. [2022-07-20 22:39:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.504038772213247) internal successors, (1862), 1238 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1862 transitions. [2022-07-20 22:39:18,849 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1862 transitions. Word has length 224 [2022-07-20 22:39:18,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:18,849 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1862 transitions. [2022-07-20 22:39:18,849 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) [2022-07-20 22:39:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1862 transitions. [2022-07-20 22:39:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-20 22:39:18,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:18,851 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:18,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-20 22:39:18,851 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:18,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1378487510, now seen corresponding path program 1 times [2022-07-20 22:39:18,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:18,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924825925] [2022-07-20 22:39:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:18,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:39:18,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:18,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924825925] [2022-07-20 22:39:18,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924825925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:18,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:18,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:18,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249692444] [2022-07-20 22:39:18,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:18,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:18,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:18,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:18,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:18,943 INFO L87 Difference]: Start difference. First operand 1239 states and 1862 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) [2022-07-20 22:39:20,955 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 [] [2022-07-20 22:39:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:21,152 INFO L93 Difference]: Finished difference Result 2477 states and 3721 transitions. [2022-07-20 22:39:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:21,152 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 225 [2022-07-20 22:39:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:21,154 INFO L225 Difference]: With dead ends: 2477 [2022-07-20 22:39:21,154 INFO L226 Difference]: Without dead ends: 1261 [2022-07-20 22:39:21,155 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 [2022-07-20 22:39:21,155 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 30 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:21,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 526 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:39:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-07-20 22:39:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1239. [2022-07-20 22:39:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5024232633279484) internal successors, (1860), 1238 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1860 transitions. [2022-07-20 22:39:21,174 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1860 transitions. Word has length 225 [2022-07-20 22:39:21,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:21,174 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1860 transitions. [2022-07-20 22:39:21,174 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) [2022-07-20 22:39:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1860 transitions. [2022-07-20 22:39:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-20 22:39:21,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:21,176 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:21,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-20 22:39:21,176 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash 995473950, now seen corresponding path program 1 times [2022-07-20 22:39:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:21,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087899457] [2022-07-20 22:39:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:21,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:39:21,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:21,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087899457] [2022-07-20 22:39:21,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087899457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:21,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:21,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:21,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500853165] [2022-07-20 22:39:21,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:21,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:21,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:21,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:21,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:21,271 INFO L87 Difference]: Start difference. First operand 1239 states and 1860 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:23,283 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 [] [2022-07-20 22:39:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:23,571 INFO L93 Difference]: Finished difference Result 2780 states and 4158 transitions. [2022-07-20 22:39:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:23,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2022-07-20 22:39:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:23,574 INFO L225 Difference]: With dead ends: 2780 [2022-07-20 22:39:23,574 INFO L226 Difference]: Without dead ends: 1564 [2022-07-20 22:39:23,575 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 [2022-07-20 22:39:23,575 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 109 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:23,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:39:23,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2022-07-20 22:39:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1350. [2022-07-20 22:39:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.5040770941438102) internal successors, (2029), 1349 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:23,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2029 transitions. [2022-07-20 22:39:23,598 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2029 transitions. Word has length 226 [2022-07-20 22:39:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:23,598 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2029 transitions. [2022-07-20 22:39:23,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2029 transitions. [2022-07-20 22:39:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-07-20 22:39:23,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:23,601 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:23,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-20 22:39:23,601 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:23,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1361684283, now seen corresponding path program 1 times [2022-07-20 22:39:23,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:23,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897416584] [2022-07-20 22:39:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:39:23,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:23,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897416584] [2022-07-20 22:39:23,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897416584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:23,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:23,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:23,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92003104] [2022-07-20 22:39:23,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:23,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:23,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:23,694 INFO L87 Difference]: Start difference. First operand 1350 states and 2029 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) [2022-07-20 22:39:25,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:25,355 INFO L93 Difference]: Finished difference Result 2695 states and 4051 transitions. [2022-07-20 22:39:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:25,356 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 227 [2022-07-20 22:39:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:25,358 INFO L225 Difference]: With dead ends: 2695 [2022-07-20 22:39:25,358 INFO L226 Difference]: Without dead ends: 1368 [2022-07-20 22:39:25,359 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 [2022-07-20 22:39:25,359 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 25 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:25,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 520 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 22:39:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-07-20 22:39:25,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1350. [2022-07-20 22:39:25,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.502594514455152) internal successors, (2027), 1349 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2027 transitions. [2022-07-20 22:39:25,387 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2027 transitions. Word has length 227 [2022-07-20 22:39:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:25,388 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2027 transitions. [2022-07-20 22:39:25,388 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) [2022-07-20 22:39:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2027 transitions. [2022-07-20 22:39:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-07-20 22:39:25,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:25,390 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:25,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-20 22:39:25,390 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:25,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash 939848528, now seen corresponding path program 1 times [2022-07-20 22:39:25,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:25,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504576878] [2022-07-20 22:39:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:25,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 22:39:25,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:25,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504576878] [2022-07-20 22:39:25,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504576878] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:25,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:25,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:25,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182884555] [2022-07-20 22:39:25,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:25,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:25,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:25,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:25,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:25,487 INFO L87 Difference]: Start difference. First operand 1350 states and 2027 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:27,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:27,750 INFO L93 Difference]: Finished difference Result 2809 states and 4219 transitions. [2022-07-20 22:39:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:27,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 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 229 [2022-07-20 22:39:27,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:27,752 INFO L225 Difference]: With dead ends: 2809 [2022-07-20 22:39:27,752 INFO L226 Difference]: Without dead ends: 1482 [2022-07-20 22:39:27,753 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 [2022-07-20 22:39:27,753 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 57 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:27,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 561 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:39:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2022-07-20 22:39:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1356. [2022-07-20 22:39:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 1.500369003690037) internal successors, (2033), 1355 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 2033 transitions. [2022-07-20 22:39:27,777 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 2033 transitions. Word has length 229 [2022-07-20 22:39:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:27,777 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 2033 transitions. [2022-07-20 22:39:27,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 2033 transitions. [2022-07-20 22:39:27,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-20 22:39:27,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:27,780 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:27,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-20 22:39:27,780 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1215121339, now seen corresponding path program 1 times [2022-07-20 22:39:27,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:27,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388351914] [2022-07-20 22:39:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:27,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:39:27,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:27,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388351914] [2022-07-20 22:39:27,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388351914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:27,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:27,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:27,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512779631] [2022-07-20 22:39:27,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:27,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:27,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:27,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:27,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:27,891 INFO L87 Difference]: Start difference. First operand 1356 states and 2033 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) [2022-07-20 22:39:29,903 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 [] [2022-07-20 22:39:30,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:30,178 INFO L93 Difference]: Finished difference Result 3113 states and 4660 transitions. [2022-07-20 22:39:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:30,179 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 230 [2022-07-20 22:39:30,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:30,180 INFO L225 Difference]: With dead ends: 3113 [2022-07-20 22:39:30,180 INFO L226 Difference]: Without dead ends: 1780 [2022-07-20 22:39:30,181 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 [2022-07-20 22:39:30,181 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 107 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:30,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 306 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:39:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-07-20 22:39:30,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1572. [2022-07-20 22:39:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 1.5085932527052832) internal successors, (2370), 1571 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2370 transitions. [2022-07-20 22:39:30,206 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2370 transitions. Word has length 230 [2022-07-20 22:39:30,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:30,206 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 2370 transitions. [2022-07-20 22:39:30,206 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) [2022-07-20 22:39:30,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2370 transitions. [2022-07-20 22:39:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-07-20 22:39:30,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:30,208 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:30,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-20 22:39:30,208 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:30,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:30,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2076780555, now seen corresponding path program 1 times [2022-07-20 22:39:30,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:30,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087212144] [2022-07-20 22:39:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:30,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 22:39:30,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:30,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087212144] [2022-07-20 22:39:30,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087212144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:30,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:30,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:30,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979120666] [2022-07-20 22:39:30,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:30,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:30,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:30,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:30,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:30,297 INFO L87 Difference]: Start difference. First operand 1572 states and 2370 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:32,311 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 [] [2022-07-20 22:39:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:32,532 INFO L93 Difference]: Finished difference Result 3223 states and 4854 transitions. [2022-07-20 22:39:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:32,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 231 [2022-07-20 22:39:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:32,533 INFO L225 Difference]: With dead ends: 3223 [2022-07-20 22:39:32,533 INFO L226 Difference]: Without dead ends: 1674 [2022-07-20 22:39:32,534 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 [2022-07-20 22:39:32,534 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 43 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:32,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 549 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:39:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-07-20 22:39:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1581. [2022-07-20 22:39:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.509493670886076) internal successors, (2385), 1580 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2385 transitions. [2022-07-20 22:39:32,558 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2385 transitions. Word has length 231 [2022-07-20 22:39:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:32,558 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2385 transitions. [2022-07-20 22:39:32,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2385 transitions. [2022-07-20 22:39:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-07-20 22:39:32,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:32,560 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:32,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-20 22:39:32,560 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:32,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:32,561 INFO L85 PathProgramCache]: Analyzing trace with hash 168015746, now seen corresponding path program 1 times [2022-07-20 22:39:32,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:32,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240826664] [2022-07-20 22:39:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:32,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-20 22:39:32,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:32,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240826664] [2022-07-20 22:39:32,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240826664] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:32,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:32,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:32,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873984295] [2022-07-20 22:39:32,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:32,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:32,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:32,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:32,647 INFO L87 Difference]: Start difference. First operand 1581 states and 2385 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) [2022-07-20 22:39:34,659 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 [] [2022-07-20 22:39:34,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:34,960 INFO L93 Difference]: Finished difference Result 3338 states and 5007 transitions. [2022-07-20 22:39:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:34,960 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 231 [2022-07-20 22:39:34,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:34,962 INFO L225 Difference]: With dead ends: 3338 [2022-07-20 22:39:34,962 INFO L226 Difference]: Without dead ends: 1780 [2022-07-20 22:39:34,963 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 [2022-07-20 22:39:34,963 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 106 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:34,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 304 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:39:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-07-20 22:39:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1581. [2022-07-20 22:39:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.5044303797468355) internal successors, (2377), 1580 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2377 transitions. [2022-07-20 22:39:35,013 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2377 transitions. Word has length 231 [2022-07-20 22:39:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:35,013 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2377 transitions. [2022-07-20 22:39:35,013 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) [2022-07-20 22:39:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2377 transitions. [2022-07-20 22:39:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-20 22:39:35,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:35,015 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:35,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-20 22:39:35,015 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:35,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1882170829, now seen corresponding path program 1 times [2022-07-20 22:39:35,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:35,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564773281] [2022-07-20 22:39:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:35,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 22:39:35,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:35,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564773281] [2022-07-20 22:39:35,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564773281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:35,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:35,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:35,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646940338] [2022-07-20 22:39:35,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:35,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:35,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:35,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:35,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:35,107 INFO L87 Difference]: Start difference. First operand 1581 states and 2377 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) [2022-07-20 22:39:36,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:36,980 INFO L93 Difference]: Finished difference Result 3223 states and 4835 transitions. [2022-07-20 22:39:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:36,981 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 232 [2022-07-20 22:39:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:36,982 INFO L225 Difference]: With dead ends: 3223 [2022-07-20 22:39:36,982 INFO L226 Difference]: Without dead ends: 1665 [2022-07-20 22:39:36,983 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 [2022-07-20 22:39:36,983 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 37 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:36,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 543 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 22:39:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-07-20 22:39:37,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1587. [2022-07-20 22:39:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 1.5025220680958387) internal successors, (2383), 1586 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2383 transitions. [2022-07-20 22:39:37,011 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2383 transitions. Word has length 232 [2022-07-20 22:39:37,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:37,011 INFO L495 AbstractCegarLoop]: Abstraction has 1587 states and 2383 transitions. [2022-07-20 22:39:37,011 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) [2022-07-20 22:39:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2383 transitions. [2022-07-20 22:39:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-07-20 22:39:37,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:37,014 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:37,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-20 22:39:37,014 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:37,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1442086911, now seen corresponding path program 1 times [2022-07-20 22:39:37,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:37,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906898351] [2022-07-20 22:39:37,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:37,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 22:39:37,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:37,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906898351] [2022-07-20 22:39:37,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906898351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:37,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:37,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:37,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489164976] [2022-07-20 22:39:37,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:37,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:37,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:37,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:37,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:37,125 INFO L87 Difference]: Start difference. First operand 1587 states and 2383 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:39,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:39,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:39,340 INFO L93 Difference]: Finished difference Result 3223 states and 4832 transitions. [2022-07-20 22:39:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:39,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2022-07-20 22:39:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:39,342 INFO L225 Difference]: With dead ends: 3223 [2022-07-20 22:39:39,342 INFO L226 Difference]: Without dead ends: 1659 [2022-07-20 22:39:39,343 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 [2022-07-20 22:39:39,343 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 34 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:39,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 539 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:39:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-07-20 22:39:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1590. [2022-07-20 22:39:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 1.5015733165512901) internal successors, (2386), 1589 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2386 transitions. [2022-07-20 22:39:39,370 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2386 transitions. Word has length 233 [2022-07-20 22:39:39,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:39,370 INFO L495 AbstractCegarLoop]: Abstraction has 1590 states and 2386 transitions. [2022-07-20 22:39:39,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:39,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2386 transitions. [2022-07-20 22:39:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-20 22:39:39,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:39,373 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:39,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-07-20 22:39:39,373 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:39,373 INFO L85 PathProgramCache]: Analyzing trace with hash 505533037, now seen corresponding path program 1 times [2022-07-20 22:39:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:39,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760993231] [2022-07-20 22:39:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:39,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 22:39:39,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:39,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760993231] [2022-07-20 22:39:39,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760993231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:39,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:39,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:39,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890567432] [2022-07-20 22:39:39,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:39,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:39,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:39,470 INFO L87 Difference]: Start difference. First operand 1590 states and 2386 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:40,515 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 [] [2022-07-20 22:39:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:40,746 INFO L93 Difference]: Finished difference Result 3226 states and 4832 transitions. [2022-07-20 22:39:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-07-20 22:39:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:40,748 INFO L225 Difference]: With dead ends: 3226 [2022-07-20 22:39:40,748 INFO L226 Difference]: Without dead ends: 1659 [2022-07-20 22:39:40,749 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 [2022-07-20 22:39:40,749 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 38 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:40,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 537 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 22:39:40,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-07-20 22:39:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1590. [2022-07-20 22:39:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 1.499685336689742) internal successors, (2383), 1589 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2383 transitions. [2022-07-20 22:39:40,775 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2383 transitions. Word has length 234 [2022-07-20 22:39:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:40,776 INFO L495 AbstractCegarLoop]: Abstraction has 1590 states and 2383 transitions. [2022-07-20 22:39:40,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2383 transitions. [2022-07-20 22:39:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-20 22:39:40,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:40,778 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:39:40,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-20 22:39:40,778 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash 198969349, now seen corresponding path program 1 times [2022-07-20 22:39:40,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:40,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395613014] [2022-07-20 22:39:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:40,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-20 22:39:40,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:40,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395613014] [2022-07-20 22:39:40,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395613014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:40,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:40,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:39:40,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997054771] [2022-07-20 22:39:40,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:40,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:39:40,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:40,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:39:40,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:39:40,987 INFO L87 Difference]: Start difference. First operand 1590 states and 2383 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:42,993 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:43,481 INFO L93 Difference]: Finished difference Result 3581 states and 5320 transitions. [2022-07-20 22:39:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:39:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-07-20 22:39:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:43,484 INFO L225 Difference]: With dead ends: 3581 [2022-07-20 22:39:43,484 INFO L226 Difference]: Without dead ends: 2014 [2022-07-20 22:39:43,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:39:43,486 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 269 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:43,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 645 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 328 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 22:39:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2022-07-20 22:39:43,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1656. [2022-07-20 22:39:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 1.4978851963746223) internal successors, (2479), 1655 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2479 transitions. [2022-07-20 22:39:43,521 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2479 transitions. Word has length 234 [2022-07-20 22:39:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:43,522 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 2479 transitions. [2022-07-20 22:39:43,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2479 transitions. [2022-07-20 22:39:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-20 22:39:43,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:43,524 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:39:43,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-20 22:39:43,525 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:43,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1942891129, now seen corresponding path program 1 times [2022-07-20 22:39:43,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:43,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503205224] [2022-07-20 22:39:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:43,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-20 22:39:43,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:43,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503205224] [2022-07-20 22:39:43,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503205224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:43,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:43,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:39:43,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251427199] [2022-07-20 22:39:43,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:43,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:39:43,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:39:43,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:39:43,723 INFO L87 Difference]: Start difference. First operand 1656 states and 2479 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:46,630 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 [] [2022-07-20 22:39:48,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:50,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:51,552 INFO L93 Difference]: Finished difference Result 4127 states and 6133 transitions. [2022-07-20 22:39:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:39:51,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-07-20 22:39:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:51,555 INFO L225 Difference]: With dead ends: 4127 [2022-07-20 22:39:51,555 INFO L226 Difference]: Without dead ends: 2494 [2022-07-20 22:39:51,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:39:51,557 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 206 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 37 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:51,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 1258 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1031 Invalid, 3 Unknown, 0 Unchecked, 7.7s Time] [2022-07-20 22:39:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2022-07-20 22:39:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2282. [2022-07-20 22:39:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.4932047347654538) internal successors, (3406), 2281 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3406 transitions. [2022-07-20 22:39:51,595 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3406 transitions. Word has length 234 [2022-07-20 22:39:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:51,595 INFO L495 AbstractCegarLoop]: Abstraction has 2282 states and 3406 transitions. [2022-07-20 22:39:51,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3406 transitions. [2022-07-20 22:39:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-20 22:39:51,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:51,598 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:51,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-07-20 22:39:51,598 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:51,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:51,598 INFO L85 PathProgramCache]: Analyzing trace with hash -682883463, now seen corresponding path program 1 times [2022-07-20 22:39:51,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:51,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253074933] [2022-07-20 22:39:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:51,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 22:39:51,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:51,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253074933] [2022-07-20 22:39:51,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253074933] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:51,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:51,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:51,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977236781] [2022-07-20 22:39:51,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:51,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:51,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:51,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:51,687 INFO L87 Difference]: Start difference. First operand 2282 states and 3406 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:53,703 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 [] [2022-07-20 22:39:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:53,937 INFO L93 Difference]: Finished difference Result 4636 states and 6905 transitions. [2022-07-20 22:39:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:53,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 235 [2022-07-20 22:39:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:53,940 INFO L225 Difference]: With dead ends: 4636 [2022-07-20 22:39:53,940 INFO L226 Difference]: Without dead ends: 2377 [2022-07-20 22:39:53,942 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 [2022-07-20 22:39:53,942 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 35 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:53,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 535 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:39:53,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-07-20 22:39:53,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2282. [2022-07-20 22:39:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.4910127137220517) internal successors, (3401), 2281 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3401 transitions. [2022-07-20 22:39:53,985 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3401 transitions. Word has length 235 [2022-07-20 22:39:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:53,985 INFO L495 AbstractCegarLoop]: Abstraction has 2282 states and 3401 transitions. [2022-07-20 22:39:53,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3401 transitions. [2022-07-20 22:39:53,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-20 22:39:53,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:53,988 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:39:53,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-07-20 22:39:53,988 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:53,989 INFO L85 PathProgramCache]: Analyzing trace with hash 999970559, now seen corresponding path program 1 times [2022-07-20 22:39:53,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:53,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385612112] [2022-07-20 22:39:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:53,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-20 22:39:54,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:54,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385612112] [2022-07-20 22:39:54,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385612112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:54,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:54,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:39:54,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865670824] [2022-07-20 22:39:54,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:54,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:39:54,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:54,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:39:54,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:39:54,129 INFO L87 Difference]: Start difference. First operand 2282 states and 3401 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:56,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:56,572 INFO L93 Difference]: Finished difference Result 4924 states and 7288 transitions. [2022-07-20 22:39:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:39:56,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 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 235 [2022-07-20 22:39:56,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:56,575 INFO L225 Difference]: With dead ends: 4924 [2022-07-20 22:39:56,575 INFO L226 Difference]: Without dead ends: 2665 [2022-07-20 22:39:56,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:39:56,577 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 247 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:56,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 625 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 319 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 22:39:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2022-07-20 22:39:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2285. [2022-07-20 22:39:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 1.4868651488616462) internal successors, (3396), 2284 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3396 transitions. [2022-07-20 22:39:56,618 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3396 transitions. Word has length 235 [2022-07-20 22:39:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:56,619 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 3396 transitions. [2022-07-20 22:39:56,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3396 transitions. [2022-07-20 22:39:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-20 22:39:56,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:56,622 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:39:56,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-07-20 22:39:56,622 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:56,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1776964066, now seen corresponding path program 1 times [2022-07-20 22:39:56,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:56,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923554750] [2022-07-20 22:39:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:56,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-20 22:39:56,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:56,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923554750] [2022-07-20 22:39:56,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923554750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:56,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:56,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:56,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077450773] [2022-07-20 22:39:56,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:56,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:56,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:56,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:56,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:56,746 INFO L87 Difference]: Start difference. First operand 2285 states and 3396 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:58,759 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 [] [2022-07-20 22:39:58,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:58,969 INFO L93 Difference]: Finished difference Result 4621 states and 6857 transitions. [2022-07-20 22:39:58,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:58,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-20 22:39:58,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:58,971 INFO L225 Difference]: With dead ends: 4621 [2022-07-20 22:39:58,971 INFO L226 Difference]: Without dead ends: 2359 [2022-07-20 22:39:58,973 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 [2022-07-20 22:39:58,973 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 36 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:58,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 550 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:39:58,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2022-07-20 22:39:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2285. [2022-07-20 22:39:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 1.4851138353765323) internal successors, (3392), 2284 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3392 transitions. [2022-07-20 22:39:59,012 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3392 transitions. Word has length 235 [2022-07-20 22:39:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:59,012 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 3392 transitions. [2022-07-20 22:39:59,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3392 transitions. [2022-07-20 22:39:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-20 22:39:59,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:59,014 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:39:59,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-07-20 22:39:59,015 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:59,015 INFO L85 PathProgramCache]: Analyzing trace with hash -973194819, now seen corresponding path program 1 times [2022-07-20 22:39:59,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:59,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421070479] [2022-07-20 22:39:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:59,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-20 22:39:59,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:59,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421070479] [2022-07-20 22:39:59,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421070479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:59,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:59,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:39:59,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236283352] [2022-07-20 22:39:59,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:59,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:39:59,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:59,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:39:59,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:39:59,203 INFO L87 Difference]: Start difference. First operand 2285 states and 3392 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:01,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:03,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:05,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:06,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:06,077 INFO L93 Difference]: Finished difference Result 5382 states and 7948 transitions. [2022-07-20 22:40:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:40:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 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 235 [2022-07-20 22:40:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:06,080 INFO L225 Difference]: With dead ends: 5382 [2022-07-20 22:40:06,080 INFO L226 Difference]: Without dead ends: 3120 [2022-07-20 22:40:06,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:40:06,082 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 346 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 77 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:06,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1107 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 850 Invalid, 3 Unknown, 0 Unchecked, 6.8s Time] [2022-07-20 22:40:06,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2022-07-20 22:40:06,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2285. [2022-07-20 22:40:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 1.4851138353765323) internal successors, (3392), 2284 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3392 transitions. [2022-07-20 22:40:06,141 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3392 transitions. Word has length 235 [2022-07-20 22:40:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:06,142 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 3392 transitions. [2022-07-20 22:40:06,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3392 transitions. [2022-07-20 22:40:06,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-07-20 22:40:06,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:06,144 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:40:06,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-07-20 22:40:06,145 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:06,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1701567074, now seen corresponding path program 1 times [2022-07-20 22:40:06,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:06,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23939044] [2022-07-20 22:40:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:06,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-07-20 22:40:06,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:06,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23939044] [2022-07-20 22:40:06,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23939044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:40:06,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:40:06,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:40:06,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783283231] [2022-07-20 22:40:06,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:40:06,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:40:06,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:40:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:40:06,244 INFO L87 Difference]: Start difference. First operand 2285 states and 3392 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:08,257 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 [] [2022-07-20 22:40:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:08,558 INFO L93 Difference]: Finished difference Result 4741 states and 7016 transitions. [2022-07-20 22:40:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:40:08,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 237 [2022-07-20 22:40:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:08,561 INFO L225 Difference]: With dead ends: 4741 [2022-07-20 22:40:08,561 INFO L226 Difference]: Without dead ends: 2479 [2022-07-20 22:40:08,562 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 [2022-07-20 22:40:08,563 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 127 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:08,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 306 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:40:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2022-07-20 22:40:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2283. [2022-07-20 22:40:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 1.4645048203330413) internal successors, (3342), 2282 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3342 transitions. [2022-07-20 22:40:08,623 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3342 transitions. Word has length 237 [2022-07-20 22:40:08,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:08,623 INFO L495 AbstractCegarLoop]: Abstraction has 2283 states and 3342 transitions. [2022-07-20 22:40:08,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:08,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3342 transitions. [2022-07-20 22:40:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-07-20 22:40:08,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:08,625 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:40:08,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-07-20 22:40:08,625 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:08,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:08,626 INFO L85 PathProgramCache]: Analyzing trace with hash -342440725, now seen corresponding path program 1 times [2022-07-20 22:40:08,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:08,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87116629] [2022-07-20 22:40:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:08,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 306 proven. 108 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-20 22:40:08,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:08,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87116629] [2022-07-20 22:40:08,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87116629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:40:08,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831252311] [2022-07-20 22:40:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:08,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:40:08,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:40:08,814 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) [2022-07-20 22:40:08,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:40:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:09,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 22:40:09,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:40:09,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-07-20 22:40:09,955 INFO L356 Elim1Store]: treesize reduction 37, result has 45.6 percent of original size [2022-07-20 22:40:09,956 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 128 treesize of output 111 [2022-07-20 22:40:09,958 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 126 treesize of output 96 [2022-07-20 22:40:09,960 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 96 treesize of output 66 [2022-07-20 22:40:10,013 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 [2022-07-20 22:40:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 331 proven. 12 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-20 22:40:10,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:40:10,047 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 107 treesize of output 89 [2022-07-20 22:40:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-20 22:40:10,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831252311] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:40:10,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:40:10,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 7] total 14 [2022-07-20 22:40:10,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512060560] [2022-07-20 22:40:10,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:40:10,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:40:10,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:10,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:40:10,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:40:10,052 INFO L87 Difference]: Start difference. First operand 2283 states and 3342 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) [2022-07-20 22:40:12,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:12,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:12,399 INFO L93 Difference]: Finished difference Result 4756 states and 6938 transitions. [2022-07-20 22:40:12,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:40:12,399 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 250 [2022-07-20 22:40:12,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:12,401 INFO L225 Difference]: With dead ends: 4756 [2022-07-20 22:40:12,402 INFO L226 Difference]: Without dead ends: 2496 [2022-07-20 22:40:12,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:40:12,404 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 123 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:12,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 353 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:40:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2022-07-20 22:40:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2173. [2022-07-20 22:40:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 1.4599447513812154) internal successors, (3171), 2172 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 3171 transitions. [2022-07-20 22:40:12,461 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 3171 transitions. Word has length 250 [2022-07-20 22:40:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:12,462 INFO L495 AbstractCegarLoop]: Abstraction has 2173 states and 3171 transitions. [2022-07-20 22:40:12,462 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) [2022-07-20 22:40:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 3171 transitions. [2022-07-20 22:40:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-07-20 22:40:12,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:12,464 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:40:12,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:40:12,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:40:12,664 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:12,665 INFO L85 PathProgramCache]: Analyzing trace with hash 425026962, now seen corresponding path program 1 times [2022-07-20 22:40:12,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:12,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352633944] [2022-07-20 22:40:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:12,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-07-20 22:40:12,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:12,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352633944] [2022-07-20 22:40:12,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352633944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:40:12,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:40:12,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:40:12,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698915006] [2022-07-20 22:40:12,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:40:12,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:40:12,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:12,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:40:12,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:40:12,772 INFO L87 Difference]: Start difference. First operand 2173 states and 3171 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:14,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:14,997 INFO L93 Difference]: Finished difference Result 4359 states and 6360 transitions. [2022-07-20 22:40:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:40:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 250 [2022-07-20 22:40:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:15,000 INFO L225 Difference]: With dead ends: 4359 [2022-07-20 22:40:15,000 INFO L226 Difference]: Without dead ends: 2209 [2022-07-20 22:40:15,000 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 [2022-07-20 22:40:15,001 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 19 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:15,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 526 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:40:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-07-20 22:40:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2173. [2022-07-20 22:40:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 1.4585635359116023) internal successors, (3168), 2172 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 3168 transitions. [2022-07-20 22:40:15,041 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 3168 transitions. Word has length 250 [2022-07-20 22:40:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:15,042 INFO L495 AbstractCegarLoop]: Abstraction has 2173 states and 3168 transitions. [2022-07-20 22:40:15,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 3168 transitions. [2022-07-20 22:40:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-20 22:40:15,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:15,044 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:40:15,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-07-20 22:40:15,044 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:15,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1396127449, now seen corresponding path program 1 times [2022-07-20 22:40:15,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:15,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986823012] [2022-07-20 22:40:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:15,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-20 22:40:15,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:15,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986823012] [2022-07-20 22:40:15,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986823012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:40:15,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:40:15,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:40:15,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63379013] [2022-07-20 22:40:15,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:40:15,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:40:15,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:40:15,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:40:15,176 INFO L87 Difference]: Start difference. First operand 2173 states and 3168 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:17,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:19,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:19,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:19,574 INFO L93 Difference]: Finished difference Result 3939 states and 5731 transitions. [2022-07-20 22:40:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:40:19,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2022-07-20 22:40:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:19,576 INFO L225 Difference]: With dead ends: 3939 [2022-07-20 22:40:19,576 INFO L226 Difference]: Without dead ends: 1789 [2022-07-20 22:40:19,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:40:19,577 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 138 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:19,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 397 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 325 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 22:40:19,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-07-20 22:40:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1524. [2022-07-20 22:40:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 1.4530531845042678) internal successors, (2213), 1523 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2213 transitions. [2022-07-20 22:40:19,611 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2213 transitions. Word has length 251 [2022-07-20 22:40:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:19,611 INFO L495 AbstractCegarLoop]: Abstraction has 1524 states and 2213 transitions. [2022-07-20 22:40:19,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2213 transitions. [2022-07-20 22:40:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-20 22:40:19,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:19,613 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:40:19,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-07-20 22:40:19,613 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:19,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1556018017, now seen corresponding path program 1 times [2022-07-20 22:40:19,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:19,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098094720] [2022-07-20 22:40:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:19,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 374 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-20 22:40:19,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:19,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098094720] [2022-07-20 22:40:19,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098094720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:40:19,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:40:19,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:40:19,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794019693] [2022-07-20 22:40:19,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:40:19,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:40:19,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:40:19,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:40:19,802 INFO L87 Difference]: Start difference. First operand 1524 states and 2213 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:21,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:23,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:24,413 INFO L93 Difference]: Finished difference Result 3592 states and 5170 transitions. [2022-07-20 22:40:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:40:24,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 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 251 [2022-07-20 22:40:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:24,416 INFO L225 Difference]: With dead ends: 3592 [2022-07-20 22:40:24,416 INFO L226 Difference]: Without dead ends: 2091 [2022-07-20 22:40:24,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:40:24,428 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 343 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 44 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:24,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 766 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 478 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-07-20 22:40:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-07-20 22:40:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1581. [2022-07-20 22:40:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.4462025316455696) internal successors, (2285), 1580 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2285 transitions. [2022-07-20 22:40:24,466 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2285 transitions. Word has length 251 [2022-07-20 22:40:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:24,466 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2285 transitions. [2022-07-20 22:40:24,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2285 transitions. [2022-07-20 22:40:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-20 22:40:24,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:24,468 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:40:24,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-07-20 22:40:24,468 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:24,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1791911393, now seen corresponding path program 1 times [2022-07-20 22:40:24,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:24,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135167624] [2022-07-20 22:40:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:24,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-20 22:40:24,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:24,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135167624] [2022-07-20 22:40:24,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135167624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:40:24,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:40:24,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:40:24,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19873364] [2022-07-20 22:40:24,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:40:24,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:40:24,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:40:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:40:24,654 INFO L87 Difference]: Start difference. First operand 1581 states and 2285 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 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) [2022-07-20 22:40:26,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:28,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:30,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:31,087 INFO L93 Difference]: Finished difference Result 3940 states and 5660 transitions. [2022-07-20 22:40:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:40:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 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 251 [2022-07-20 22:40:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:31,090 INFO L225 Difference]: With dead ends: 3940 [2022-07-20 22:40:31,090 INFO L226 Difference]: Without dead ends: 2382 [2022-07-20 22:40:31,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:40:31,091 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 325 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:31,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1073 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 834 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-07-20 22:40:31,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-07-20 22:40:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2186. [2022-07-20 22:40:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 1.440274599542334) internal successors, (3147), 2185 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 3147 transitions. [2022-07-20 22:40:31,140 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 3147 transitions. Word has length 251 [2022-07-20 22:40:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:31,141 INFO L495 AbstractCegarLoop]: Abstraction has 2186 states and 3147 transitions. [2022-07-20 22:40:31,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 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) [2022-07-20 22:40:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 3147 transitions. [2022-07-20 22:40:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-20 22:40:31,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:31,143 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:40:31,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-07-20 22:40:31,143 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:31,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash 204295532, now seen corresponding path program 1 times [2022-07-20 22:40:31,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:31,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161090677] [2022-07-20 22:40:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:31,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-20 22:40:31,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:31,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161090677] [2022-07-20 22:40:31,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161090677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:40:31,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:40:31,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:40:31,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696710428] [2022-07-20 22:40:31,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:40:31,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:40:31,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:31,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:40:31,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:40:31,307 INFO L87 Difference]: Start difference. First operand 2186 states and 3147 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:32,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:32,933 INFO L93 Difference]: Finished difference Result 4733 states and 6784 transitions. [2022-07-20 22:40:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:40:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2022-07-20 22:40:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:32,935 INFO L225 Difference]: With dead ends: 4733 [2022-07-20 22:40:32,936 INFO L226 Difference]: Without dead ends: 2570 [2022-07-20 22:40:32,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:40:32,937 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 244 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:32,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 616 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 22:40:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2022-07-20 22:40:32,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2189. [2022-07-20 22:40:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 1.4360146252285193) internal successors, (3142), 2188 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:32,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 3142 transitions. [2022-07-20 22:40:32,989 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 3142 transitions. Word has length 252 [2022-07-20 22:40:32,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:32,989 INFO L495 AbstractCegarLoop]: Abstraction has 2189 states and 3142 transitions. [2022-07-20 22:40:32,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:32,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 3142 transitions. [2022-07-20 22:40:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-20 22:40:32,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:32,991 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:40:32,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-07-20 22:40:32,992 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:32,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:32,992 INFO L85 PathProgramCache]: Analyzing trace with hash -502301074, now seen corresponding path program 1 times [2022-07-20 22:40:32,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:32,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466336144] [2022-07-20 22:40:32,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:32,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-20 22:40:33,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:33,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466336144] [2022-07-20 22:40:33,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466336144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:40:33,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:40:33,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:40:33,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781085538] [2022-07-20 22:40:33,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:40:33,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:40:33,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:33,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:40:33,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:40:33,217 INFO L87 Difference]: Start difference. First operand 2189 states and 3142 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:35,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:37,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:39,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:40,068 INFO L93 Difference]: Finished difference Result 5166 states and 7383 transitions. [2022-07-20 22:40:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:40:40,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2022-07-20 22:40:40,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:40,071 INFO L225 Difference]: With dead ends: 5166 [2022-07-20 22:40:40,071 INFO L226 Difference]: Without dead ends: 3000 [2022-07-20 22:40:40,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:40:40,073 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 324 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:40,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1076 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 833 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2022-07-20 22:40:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2022-07-20 22:40:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2189. [2022-07-20 22:40:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 1.4360146252285193) internal successors, (3142), 2188 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 3142 transitions. [2022-07-20 22:40:40,125 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 3142 transitions. Word has length 252 [2022-07-20 22:40:40,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:40,125 INFO L495 AbstractCegarLoop]: Abstraction has 2189 states and 3142 transitions. [2022-07-20 22:40:40,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 3142 transitions. [2022-07-20 22:40:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-20 22:40:40,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:40,127 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:40:40,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-07-20 22:40:40,127 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:40,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1345889978, now seen corresponding path program 1 times [2022-07-20 22:40:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:40,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532750182] [2022-07-20 22:40:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-20 22:40:40,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:40,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532750182] [2022-07-20 22:40:40,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532750182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:40:40,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:40:40,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:40:40,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045819042] [2022-07-20 22:40:40,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:40:40,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:40:40,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:40,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:40:40,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:40:40,310 INFO L87 Difference]: Start difference. First operand 2189 states and 3142 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:42,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:43,484 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:44,085 INFO L93 Difference]: Finished difference Result 4894 states and 6988 transitions. [2022-07-20 22:40:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:40:44,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 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 253 [2022-07-20 22:40:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:44,087 INFO L225 Difference]: With dead ends: 4894 [2022-07-20 22:40:44,087 INFO L226 Difference]: Without dead ends: 2728 [2022-07-20 22:40:44,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:40:44,088 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 327 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:44,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 762 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 478 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-07-20 22:40:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2022-07-20 22:40:44,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2192. [2022-07-20 22:40:44,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.4317663167503423) internal successors, (3137), 2191 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 3137 transitions. [2022-07-20 22:40:44,141 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 3137 transitions. Word has length 253 [2022-07-20 22:40:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:44,141 INFO L495 AbstractCegarLoop]: Abstraction has 2192 states and 3137 transitions. [2022-07-20 22:40:44,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 3137 transitions. [2022-07-20 22:40:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-20 22:40:44,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:44,143 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:40:44,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-07-20 22:40:44,143 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1775548284, now seen corresponding path program 1 times [2022-07-20 22:40:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:44,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331096823] [2022-07-20 22:40:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-20 22:40:44,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:44,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331096823] [2022-07-20 22:40:44,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331096823] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:40:44,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:40:44,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:40:44,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987443692] [2022-07-20 22:40:44,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:40:44,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:40:44,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:40:44,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:40:44,330 INFO L87 Difference]: Start difference. First operand 2192 states and 3137 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:46,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:48,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:50,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:51,156 INFO L93 Difference]: Finished difference Result 5162 states and 7360 transitions. [2022-07-20 22:40:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:40:51,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 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 253 [2022-07-20 22:40:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:51,159 INFO L225 Difference]: With dead ends: 5162 [2022-07-20 22:40:51,159 INFO L226 Difference]: Without dead ends: 2993 [2022-07-20 22:40:51,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:40:51,160 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 323 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:51,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1076 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 833 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2022-07-20 22:40:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-07-20 22:40:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2192. [2022-07-20 22:40:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.4317663167503423) internal successors, (3137), 2191 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 3137 transitions. [2022-07-20 22:40:51,229 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 3137 transitions. Word has length 253 [2022-07-20 22:40:51,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:51,229 INFO L495 AbstractCegarLoop]: Abstraction has 2192 states and 3137 transitions. [2022-07-20 22:40:51,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 3137 transitions. [2022-07-20 22:40:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-20 22:40:51,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:51,232 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:40:51,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-07-20 22:40:51,232 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1482178204, now seen corresponding path program 1 times [2022-07-20 22:40:51,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:51,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355403001] [2022-07-20 22:40:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:51,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-07-20 22:40:51,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:51,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355403001] [2022-07-20 22:40:51,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355403001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:40:51,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:40:51,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:40:51,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533197242] [2022-07-20 22:40:51,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:40:51,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:40:51,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:51,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:40:51,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:40:51,448 INFO L87 Difference]: Start difference. First operand 2192 states and 3137 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:53,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:54,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:40:54,856 INFO L93 Difference]: Finished difference Result 4381 states and 6270 transitions. [2022-07-20 22:40:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:40:54,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2022-07-20 22:40:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:40:54,858 INFO L225 Difference]: With dead ends: 4381 [2022-07-20 22:40:54,858 INFO L226 Difference]: Without dead ends: 2192 [2022-07-20 22:40:54,859 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 [2022-07-20 22:40:54,859 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 7 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:40:54,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 631 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-07-20 22:40:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2022-07-20 22:40:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2192. [2022-07-20 22:40:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.4313099041533546) internal successors, (3136), 2191 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 3136 transitions. [2022-07-20 22:40:54,917 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 3136 transitions. Word has length 263 [2022-07-20 22:40:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:40:54,917 INFO L495 AbstractCegarLoop]: Abstraction has 2192 states and 3136 transitions. [2022-07-20 22:40:54,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 3136 transitions. [2022-07-20 22:40:54,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-20 22:40:54,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:40:54,920 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 22:40:54,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-07-20 22:40:54,920 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:40:54,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:40:54,920 INFO L85 PathProgramCache]: Analyzing trace with hash 350204006, now seen corresponding path program 1 times [2022-07-20 22:40:54,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:40:54,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211071904] [2022-07-20 22:40:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:54,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:40:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 313 proven. 242 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-20 22:40:56,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:40:56,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211071904] [2022-07-20 22:40:56,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211071904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:40:56,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238452581] [2022-07-20 22:40:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:40:56,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:40:56,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:40:56,165 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) [2022-07-20 22:40:56,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:40:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:40:57,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 191 conjunts are in the unsatisfiable core [2022-07-20 22:40:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:40:57,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:40:57,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 24 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12633 treesize of output 2535