./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.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.16.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:41:50,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:41:50,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:41:50,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:41:50,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:41:50,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:41:50,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:41:50,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:41:50,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:41:50,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:41:50,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:41:50,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:41:50,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:41:50,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:41:50,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:41:50,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:41:50,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:41:50,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:41:50,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:41:50,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:41:50,339 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:41:50,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:41:50,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:41:50,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:41:50,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:41:50,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:41:50,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:41:50,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:41:50,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:41:50,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:41:50,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:41:50,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:41:50,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:41:50,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:41:50,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:41:50,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:41:50,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:41:50,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:41:50,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:41:50,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:41:50,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:41:50,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:41:50,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:41:50,388 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:41:50,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:41:50,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:41:50,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:41:50,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:41:50,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:41:50,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:41:50,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:41:50,391 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:41:50,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:41:50,392 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:41:50,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:41:50,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:41:50,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:41:50,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:41:50,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:41:50,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:41:50,393 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:41:50,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:41:50,393 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:41:50,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:41:50,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:41:50,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:41:50,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:41:50,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:41:50,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:41:50,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:41:50,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:41:50,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:41:50,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:41:50,395 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:41:50,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:41:50,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:41:50,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2022-07-20 22:41:50,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:41:50,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:41:50,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:41:50,689 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:41:50,689 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:41:50,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2022-07-20 22:41:50,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/336b25377/a3518212bfca4a5cb910a0193e71bf50/FLAG3fef12df4 [2022-07-20 22:41:51,136 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:41:51,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2022-07-20 22:41:51,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/336b25377/a3518212bfca4a5cb910a0193e71bf50/FLAG3fef12df4 [2022-07-20 22:41:51,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/336b25377/a3518212bfca4a5cb910a0193e71bf50 [2022-07-20 22:41:51,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:41:51,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:41:51,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:41:51,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:41:51,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:41:51,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:41:51" (1/1) ... [2022-07-20 22:41:51,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6eab92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:51, skipping insertion in model container [2022-07-20 22:41:51,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:41:51" (1/1) ... [2022-07-20 22:41:51,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:41:51,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:41:51,881 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.16.i.cil-1.c[77378,77391] [2022-07-20 22:41:51,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:41:51,909 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:41:52,000 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.16.i.cil-1.c[77378,77391] [2022-07-20 22:41:52,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:41:52,018 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:41:52,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52 WrapperNode [2022-07-20 22:41:52,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:41:52,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:41:52,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:41:52,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:41:52,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52" (1/1) ... [2022-07-20 22:41:52,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52" (1/1) ... [2022-07-20 22:41:52,087 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 809 [2022-07-20 22:41:52,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:41:52,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:41:52,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:41:52,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:41:52,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52" (1/1) ... [2022-07-20 22:41:52,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52" (1/1) ... [2022-07-20 22:41:52,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52" (1/1) ... [2022-07-20 22:41:52,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52" (1/1) ... [2022-07-20 22:41:52,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52" (1/1) ... [2022-07-20 22:41:52,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52" (1/1) ... [2022-07-20 22:41:52,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52" (1/1) ... [2022-07-20 22:41:52,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:41:52,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:41:52,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:41:52,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:41:52,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52" (1/1) ... [2022-07-20 22:41:52,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:41:52,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:41:52,192 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 22:41:52,194 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 22:41:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:41:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 22:41:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:41:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:41:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 22:41:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:41:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 22:41:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:41:52,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:41:52,310 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:41:52,312 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:41:52,339 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:41:54,804 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-20 22:41:54,805 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-20 22:41:54,805 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:41:54,813 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:41:54,813 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 22:41:54,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:41:54 BoogieIcfgContainer [2022-07-20 22:41:54,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:41:54,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:41:54,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:41:54,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:41:54,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:41:51" (1/3) ... [2022-07-20 22:41:54,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f38366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:41:54, skipping insertion in model container [2022-07-20 22:41:54,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:52" (2/3) ... [2022-07-20 22:41:54,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f38366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:41:54, skipping insertion in model container [2022-07-20 22:41:54,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:41:54" (3/3) ... [2022-07-20 22:41:54,821 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-1.c [2022-07-20 22:41:54,831 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:41:54,831 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:41:54,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:41:54,887 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@4f8579ed, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@301549d9 [2022-07-20 22:41:54,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:41:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 22:41:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:41:54,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:41:54,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:41:54,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:41:54,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:41:54,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1590777092, now seen corresponding path program 1 times [2022-07-20 22:41:54,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:41:54,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698658895] [2022-07-20 22:41:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:41:54,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:41:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:41:55,286 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 22:41:55,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:41:55,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698658895] [2022-07-20 22:41:55,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698658895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:41:55,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:41:55,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:41:55,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130280163] [2022-07-20 22:41:55,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:41:55,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:41:55,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:41:55,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:41:55,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:41:55,308 INFO L87 Difference]: Start difference. First operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 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 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:41:56,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:41:56,086 INFO L93 Difference]: Finished difference Result 444 states and 762 transitions. [2022-07-20 22:41:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:41:56,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-20 22:41:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:41:56,099 INFO L225 Difference]: With dead ends: 444 [2022-07-20 22:41:56,099 INFO L226 Difference]: Without dead ends: 271 [2022-07-20 22:41:56,102 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 22:41:56,106 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 170 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:41:56,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 489 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:41:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-20 22:41:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 185. [2022-07-20 22:41:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.625) internal successors, (299), 184 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 22:41:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 299 transitions. [2022-07-20 22:41:56,149 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 299 transitions. Word has length 45 [2022-07-20 22:41:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:41:56,149 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 299 transitions. [2022-07-20 22:41:56,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:41:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 299 transitions. [2022-07-20 22:41:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 22:41:56,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:41:56,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:41:56,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:41:56,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:41:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:41:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash -956498629, now seen corresponding path program 1 times [2022-07-20 22:41:56,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:41:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999651393] [2022-07-20 22:41:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:41:56,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:41:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:41:56,334 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 22:41:56,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:41:56,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999651393] [2022-07-20 22:41:56,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999651393] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:41:56,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:41:56,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:41:56,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202802848] [2022-07-20 22:41:56,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:41:56,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:41:56,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:41:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:41:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:41:56,339 INFO L87 Difference]: Start difference. First operand 185 states and 299 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:41:58,357 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 22:41:58,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:41:58,593 INFO L93 Difference]: Finished difference Result 388 states and 625 transitions. [2022-07-20 22:41:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:41:58,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-20 22:41:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:41:58,595 INFO L225 Difference]: With dead ends: 388 [2022-07-20 22:41:58,595 INFO L226 Difference]: Without dead ends: 213 [2022-07-20 22:41:58,596 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 22:41:58,597 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 22 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 517 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 22:41:58,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 517 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:41:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-20 22:41:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2022-07-20 22:41:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.6307692307692307) internal successors, (318), 195 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 22:41:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 318 transitions. [2022-07-20 22:41:58,605 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 318 transitions. Word has length 46 [2022-07-20 22:41:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:41:58,606 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 318 transitions. [2022-07-20 22:41:58,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:41:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 318 transitions. [2022-07-20 22:41:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 22:41:58,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:41:58,621 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] [2022-07-20 22:41:58,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:41:58,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:41:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:41:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1903034717, now seen corresponding path program 1 times [2022-07-20 22:41:58,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:41:58,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966688408] [2022-07-20 22:41:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:41:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:41:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:41:58,774 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 22:41:58,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:41:58,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966688408] [2022-07-20 22:41:58,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966688408] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:41:58,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:41:58,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:41:58,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630656171] [2022-07-20 22:41:58,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:41:58,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:41:58,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:41:58,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:41:58,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:41:58,777 INFO L87 Difference]: Start difference. First operand 196 states and 318 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:00,785 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 22:42:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:01,107 INFO L93 Difference]: Finished difference Result 535 states and 873 transitions. [2022-07-20 22:42:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:01,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-20 22:42:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:01,110 INFO L225 Difference]: With dead ends: 535 [2022-07-20 22:42:01,110 INFO L226 Difference]: Without dead ends: 360 [2022-07-20 22:42:01,111 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 22:42:01,112 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 159 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:01,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 694 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 264 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:42:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-20 22:42:01,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 228. [2022-07-20 22:42:01,121 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 22:42:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 369 transitions. [2022-07-20 22:42:01,122 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 369 transitions. Word has length 59 [2022-07-20 22:42:01,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:01,122 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 369 transitions. [2022-07-20 22:42:01,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:01,122 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 369 transitions. [2022-07-20 22:42:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:42:01,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:01,124 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] [2022-07-20 22:42:01,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:42:01,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:01,125 INFO L85 PathProgramCache]: Analyzing trace with hash 23257778, now seen corresponding path program 1 times [2022-07-20 22:42:01,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:01,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968372590] [2022-07-20 22:42:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:01,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:01,210 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 22:42:01,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:01,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968372590] [2022-07-20 22:42:01,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968372590] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:01,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:01,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:01,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559624670] [2022-07-20 22:42:01,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:01,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:01,213 INFO L87 Difference]: Start difference. First operand 228 states and 369 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:01,820 INFO L93 Difference]: Finished difference Result 543 states and 876 transitions. [2022-07-20 22:42:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:01,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-20 22:42:01,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:01,821 INFO L225 Difference]: With dead ends: 543 [2022-07-20 22:42:01,822 INFO L226 Difference]: Without dead ends: 336 [2022-07-20 22:42:01,822 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 22:42:01,823 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 164 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:01,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 382 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-07-20 22:42:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 228. [2022-07-20 22:42:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.6079295154185023) internal successors, (365), 227 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 22:42:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 365 transitions. [2022-07-20 22:42:01,830 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 365 transitions. Word has length 60 [2022-07-20 22:42:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:01,830 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 365 transitions. [2022-07-20 22:42:01,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 365 transitions. [2022-07-20 22:42:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:42:01,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:01,832 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] [2022-07-20 22:42:01,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:42:01,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:01,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1612277602, now seen corresponding path program 1 times [2022-07-20 22:42:01,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:01,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662726208] [2022-07-20 22:42:01,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:01,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:01,915 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 22:42:01,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:01,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662726208] [2022-07-20 22:42:01,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662726208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:01,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:01,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:01,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603775953] [2022-07-20 22:42:01,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:01,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:01,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:01,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:01,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:01,918 INFO L87 Difference]: Start difference. First operand 228 states and 365 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:03,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:03,717 INFO L93 Difference]: Finished difference Result 451 states and 719 transitions. [2022-07-20 22:42:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:03,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-20 22:42:03,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:03,719 INFO L225 Difference]: With dead ends: 451 [2022-07-20 22:42:03,719 INFO L226 Difference]: Without dead ends: 244 [2022-07-20 22:42:03,720 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 22:42:03,720 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 26 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:03,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 521 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 22:42:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-20 22:42:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 228. [2022-07-20 22:42:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.60352422907489) internal successors, (364), 227 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 22:42:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 364 transitions. [2022-07-20 22:42:03,726 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 364 transitions. Word has length 60 [2022-07-20 22:42:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:03,726 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 364 transitions. [2022-07-20 22:42:03,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 364 transitions. [2022-07-20 22:42:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:42:03,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:03,727 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] [2022-07-20 22:42:03,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 22:42:03,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:03,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:03,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2036873383, now seen corresponding path program 1 times [2022-07-20 22:42:03,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:03,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081055682] [2022-07-20 22:42:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:03,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:03,803 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 22:42:03,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:03,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081055682] [2022-07-20 22:42:03,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081055682] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:03,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:03,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:03,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919881944] [2022-07-20 22:42:03,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:03,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:03,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:03,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:03,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:03,806 INFO L87 Difference]: Start difference. First operand 228 states and 364 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:04,263 INFO L93 Difference]: Finished difference Result 450 states and 717 transitions. [2022-07-20 22:42:04,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:04,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-20 22:42:04,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:04,265 INFO L225 Difference]: With dead ends: 450 [2022-07-20 22:42:04,265 INFO L226 Difference]: Without dead ends: 243 [2022-07-20 22:42:04,265 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 22:42:04,266 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 19 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:04,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 523 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:42:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-20 22:42:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2022-07-20 22:42:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.5991189427312775) internal successors, (363), 227 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 22:42:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 363 transitions. [2022-07-20 22:42:04,271 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 363 transitions. Word has length 60 [2022-07-20 22:42:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:04,272 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 363 transitions. [2022-07-20 22:42:04,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:04,272 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 363 transitions. [2022-07-20 22:42:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:42:04,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:04,273 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] [2022-07-20 22:42:04,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:42:04,274 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:04,274 INFO L85 PathProgramCache]: Analyzing trace with hash 66586599, now seen corresponding path program 1 times [2022-07-20 22:42:04,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:04,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032729468] [2022-07-20 22:42:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:04,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:04,369 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 22:42:04,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:04,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032729468] [2022-07-20 22:42:04,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032729468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:04,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:04,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:04,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235499089] [2022-07-20 22:42:04,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:04,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:04,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:04,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:04,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:04,371 INFO L87 Difference]: Start difference. First operand 228 states and 363 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:04,893 INFO L93 Difference]: Finished difference Result 543 states and 867 transitions. [2022-07-20 22:42:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:04,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-20 22:42:04,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:04,895 INFO L225 Difference]: With dead ends: 543 [2022-07-20 22:42:04,895 INFO L226 Difference]: Without dead ends: 336 [2022-07-20 22:42:04,895 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 22:42:04,895 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 157 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:04,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 382 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:04,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-07-20 22:42:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 229. [2022-07-20 22:42:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.587719298245614) internal successors, (362), 228 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 22:42:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 362 transitions. [2022-07-20 22:42:04,901 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 362 transitions. Word has length 60 [2022-07-20 22:42:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:04,901 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 362 transitions. [2022-07-20 22:42:04,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 362 transitions. [2022-07-20 22:42:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 22:42:04,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:04,902 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] [2022-07-20 22:42:04,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:42:04,902 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:04,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash 415717658, now seen corresponding path program 1 times [2022-07-20 22:42:04,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:04,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245962891] [2022-07-20 22:42:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:04,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:04,969 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 22:42:04,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:04,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245962891] [2022-07-20 22:42:04,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245962891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:04,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:04,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:04,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904252032] [2022-07-20 22:42:04,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:04,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:04,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:04,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:04,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:04,971 INFO L87 Difference]: Start difference. First operand 229 states and 362 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 22:42:06,976 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 22:42:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:07,147 INFO L93 Difference]: Finished difference Result 450 states and 713 transitions. [2022-07-20 22:42:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:07,148 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 22:42:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:07,149 INFO L225 Difference]: With dead ends: 450 [2022-07-20 22:42:07,149 INFO L226 Difference]: Without dead ends: 242 [2022-07-20 22:42:07,149 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 22:42:07,150 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 22 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 527 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 22:42:07,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 527 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:42:07,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-20 22:42:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 229. [2022-07-20 22:42:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.5833333333333333) internal successors, (361), 228 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 361 transitions. [2022-07-20 22:42:07,155 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 361 transitions. Word has length 61 [2022-07-20 22:42:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:07,155 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 361 transitions. [2022-07-20 22:42:07,155 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 22:42:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 361 transitions. [2022-07-20 22:42:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:42:07,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:07,156 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] [2022-07-20 22:42:07,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 22:42:07,156 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:07,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash -588000903, now seen corresponding path program 1 times [2022-07-20 22:42:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:07,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660151011] [2022-07-20 22:42:07,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:07,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:07,236 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 22:42:07,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:07,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660151011] [2022-07-20 22:42:07,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660151011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:07,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:07,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:07,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527564334] [2022-07-20 22:42:07,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:07,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:07,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:07,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:07,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:07,238 INFO L87 Difference]: Start difference. First operand 229 states and 361 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 22:42:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:08,411 INFO L93 Difference]: Finished difference Result 450 states and 712 transitions. [2022-07-20 22:42:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:08,411 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 22:42:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:08,412 INFO L225 Difference]: With dead ends: 450 [2022-07-20 22:42:08,412 INFO L226 Difference]: Without dead ends: 242 [2022-07-20 22:42:08,412 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 22:42:08,413 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 20 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 527 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 22:42:08,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 527 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 22:42:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-20 22:42:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 229. [2022-07-20 22:42:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.5789473684210527) internal successors, (360), 228 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 360 transitions. [2022-07-20 22:42:08,417 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 360 transitions. Word has length 62 [2022-07-20 22:42:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:08,417 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 360 transitions. [2022-07-20 22:42:08,417 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 22:42:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 360 transitions. [2022-07-20 22:42:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 22:42:08,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:08,418 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] [2022-07-20 22:42:08,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 22:42:08,418 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:08,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1085567403, now seen corresponding path program 1 times [2022-07-20 22:42:08,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:08,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955089025] [2022-07-20 22:42:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:08,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:08,486 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 22:42:08,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:08,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955089025] [2022-07-20 22:42:08,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955089025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:08,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:08,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:08,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691180294] [2022-07-20 22:42:08,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:08,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:08,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:08,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:08,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:08,488 INFO L87 Difference]: Start difference. First operand 229 states and 360 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 22:42:09,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:10,010 INFO L93 Difference]: Finished difference Result 440 states and 698 transitions. [2022-07-20 22:42:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:10,011 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 22:42:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:10,011 INFO L225 Difference]: With dead ends: 440 [2022-07-20 22:42:10,012 INFO L226 Difference]: Without dead ends: 232 [2022-07-20 22:42:10,012 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 22:42:10,012 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 11 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:10,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 541 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 22:42:10,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-20 22:42:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2022-07-20 22:42:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.5745614035087718) internal successors, (359), 228 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 359 transitions. [2022-07-20 22:42:10,018 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 359 transitions. Word has length 63 [2022-07-20 22:42:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:10,018 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 359 transitions. [2022-07-20 22:42:10,018 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 22:42:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 359 transitions. [2022-07-20 22:42:10,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 22:42:10,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:10,020 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] [2022-07-20 22:42:10,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 22:42:10,020 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:10,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:10,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1421192685, now seen corresponding path program 1 times [2022-07-20 22:42:10,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:10,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292085615] [2022-07-20 22:42:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:10,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:10,098 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 22:42:10,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:10,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292085615] [2022-07-20 22:42:10,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292085615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:10,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:10,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:10,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910550311] [2022-07-20 22:42:10,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:10,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:10,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:10,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:10,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:10,100 INFO L87 Difference]: Start difference. First operand 229 states and 359 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 22:42:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:10,567 INFO L93 Difference]: Finished difference Result 477 states and 753 transitions. [2022-07-20 22:42:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:10,568 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 22:42:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:10,569 INFO L225 Difference]: With dead ends: 477 [2022-07-20 22:42:10,569 INFO L226 Difference]: Without dead ends: 269 [2022-07-20 22:42:10,569 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 22:42:10,569 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 31 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:10,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 545 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-20 22:42:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 251. [2022-07-20 22:42:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.576) internal successors, (394), 250 states have internal predecessors, (394), 0 states have call successors, (0), 0 states 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 22:42:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 394 transitions. [2022-07-20 22:42:10,574 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 394 transitions. Word has length 63 [2022-07-20 22:42:10,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:10,574 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 394 transitions. [2022-07-20 22:42:10,574 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 22:42:10,574 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 394 transitions. [2022-07-20 22:42:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 22:42:10,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:10,575 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:10,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 22:42:10,575 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:10,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:10,575 INFO L85 PathProgramCache]: Analyzing trace with hash 523971024, now seen corresponding path program 1 times [2022-07-20 22:42:10,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:10,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223281343] [2022-07-20 22:42:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:10,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:10,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:10,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223281343] [2022-07-20 22:42:10,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223281343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:10,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:10,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:10,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598967977] [2022-07-20 22:42:10,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:10,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:10,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:10,668 INFO L87 Difference]: Start difference. First operand 251 states and 394 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:11,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:11,098 INFO L93 Difference]: Finished difference Result 588 states and 931 transitions. [2022-07-20 22:42:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:11,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-20 22:42:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:11,100 INFO L225 Difference]: With dead ends: 588 [2022-07-20 22:42:11,100 INFO L226 Difference]: Without dead ends: 358 [2022-07-20 22:42:11,100 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 22:42:11,101 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 162 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:11,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 382 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:42:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-07-20 22:42:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 251. [2022-07-20 22:42:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.56) internal successors, (390), 250 states have internal predecessors, (390), 0 states have call successors, (0), 0 states 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 22:42:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 390 transitions. [2022-07-20 22:42:11,105 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 390 transitions. Word has length 77 [2022-07-20 22:42:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:11,106 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 390 transitions. [2022-07-20 22:42:11,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 390 transitions. [2022-07-20 22:42:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 22:42:11,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:11,106 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:11,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 22:42:11,107 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:11,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:11,107 INFO L85 PathProgramCache]: Analyzing trace with hash -121845287, now seen corresponding path program 1 times [2022-07-20 22:42:11,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:11,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291114347] [2022-07-20 22:42:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:11,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:11,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:11,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291114347] [2022-07-20 22:42:11,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291114347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:11,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:11,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:11,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013308310] [2022-07-20 22:42:11,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:11,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:11,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:11,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:11,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:11,203 INFO L87 Difference]: Start difference. First operand 251 states and 390 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:11,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:11,843 INFO L93 Difference]: Finished difference Result 498 states and 778 transitions. [2022-07-20 22:42:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:11,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-20 22:42:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:11,846 INFO L225 Difference]: With dead ends: 498 [2022-07-20 22:42:11,846 INFO L226 Difference]: Without dead ends: 268 [2022-07-20 22:42:11,847 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 22:42:11,847 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 33 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:11,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 547 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-20 22:42:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 251. [2022-07-20 22:42:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.556) internal successors, (389), 250 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 22:42:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 389 transitions. [2022-07-20 22:42:11,851 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 389 transitions. Word has length 77 [2022-07-20 22:42:11,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:11,852 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 389 transitions. [2022-07-20 22:42:11,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:11,852 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 389 transitions. [2022-07-20 22:42:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-20 22:42:11,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:11,852 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:11,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:42:11,852 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:11,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2080051672, now seen corresponding path program 1 times [2022-07-20 22:42:11,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:11,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723228310] [2022-07-20 22:42:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:11,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:11,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:11,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723228310] [2022-07-20 22:42:11,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723228310] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:11,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:11,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:11,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149843639] [2022-07-20 22:42:11,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:11,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:11,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:11,932 INFO L87 Difference]: Start difference. First operand 251 states and 389 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:13,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:13,060 INFO L93 Difference]: Finished difference Result 588 states and 921 transitions. [2022-07-20 22:42:13,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:13,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-20 22:42:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:13,062 INFO L225 Difference]: With dead ends: 588 [2022-07-20 22:42:13,062 INFO L226 Difference]: Without dead ends: 358 [2022-07-20 22:42:13,062 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 22:42:13,062 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 160 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:13,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 382 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 22:42:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-07-20 22:42:13,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 251. [2022-07-20 22:42:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.54) internal successors, (385), 250 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 22:42:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 385 transitions. [2022-07-20 22:42:13,068 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 385 transitions. Word has length 78 [2022-07-20 22:42:13,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:13,068 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 385 transitions. [2022-07-20 22:42:13,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:13,068 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 385 transitions. [2022-07-20 22:42:13,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 22:42:13,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:13,069 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:13,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 22:42:13,069 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -647438805, now seen corresponding path program 1 times [2022-07-20 22:42:13,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:13,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007523601] [2022-07-20 22:42:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:13,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:13,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:13,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007523601] [2022-07-20 22:42:13,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007523601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:13,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:13,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:13,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731770678] [2022-07-20 22:42:13,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:13,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:13,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:13,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:13,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:13,145 INFO L87 Difference]: Start difference. First operand 251 states and 385 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:14,037 INFO L93 Difference]: Finished difference Result 588 states and 913 transitions. [2022-07-20 22:42:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-20 22:42:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:14,038 INFO L225 Difference]: With dead ends: 588 [2022-07-20 22:42:14,038 INFO L226 Difference]: Without dead ends: 358 [2022-07-20 22:42:14,039 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 22:42:14,039 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 158 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:14,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 382 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:42:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-07-20 22:42:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 251. [2022-07-20 22:42:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.524) internal successors, (381), 250 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 22:42:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 381 transitions. [2022-07-20 22:42:14,045 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 381 transitions. Word has length 79 [2022-07-20 22:42:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:14,045 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 381 transitions. [2022-07-20 22:42:14,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 381 transitions. [2022-07-20 22:42:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-20 22:42:14,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:14,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1] [2022-07-20 22:42:14,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 22:42:14,046 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:14,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1366824931, now seen corresponding path program 1 times [2022-07-20 22:42:14,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:14,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751752483] [2022-07-20 22:42:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:14,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:14,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:14,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751752483] [2022-07-20 22:42:14,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751752483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:14,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:14,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:14,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482341954] [2022-07-20 22:42:14,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:14,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:14,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:14,118 INFO L87 Difference]: Start difference. First operand 251 states and 381 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 22:42:15,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:15,590 INFO L93 Difference]: Finished difference Result 578 states and 892 transitions. [2022-07-20 22:42:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:15,591 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 80 [2022-07-20 22:42:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:15,592 INFO L225 Difference]: With dead ends: 578 [2022-07-20 22:42:15,592 INFO L226 Difference]: Without dead ends: 348 [2022-07-20 22:42:15,592 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 22:42:15,593 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 149 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:15,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 402 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 22:42:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-20 22:42:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 251. [2022-07-20 22:42:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.508) internal successors, (377), 250 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 22:42:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 377 transitions. [2022-07-20 22:42:15,598 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 377 transitions. Word has length 80 [2022-07-20 22:42:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:15,598 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 377 transitions. [2022-07-20 22:42:15,599 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 22:42:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 377 transitions. [2022-07-20 22:42:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-20 22:42:15,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:15,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:15,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 22:42:15,600 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:15,600 INFO L85 PathProgramCache]: Analyzing trace with hash -238422134, now seen corresponding path program 1 times [2022-07-20 22:42:15,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:15,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143372980] [2022-07-20 22:42:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:15,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:15,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:15,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143372980] [2022-07-20 22:42:15,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143372980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:15,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:15,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:15,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100949642] [2022-07-20 22:42:15,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:15,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:15,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:15,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:15,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:15,716 INFO L87 Difference]: Start difference. First operand 251 states and 377 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 22:42:16,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:17,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:17,080 INFO L93 Difference]: Finished difference Result 578 states and 884 transitions. [2022-07-20 22:42:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:17,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-20 22:42:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:17,082 INFO L225 Difference]: With dead ends: 578 [2022-07-20 22:42:17,082 INFO L226 Difference]: Without dead ends: 348 [2022-07-20 22:42:17,082 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 22:42:17,083 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 123 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:17,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 424 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 22:42:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-20 22:42:17,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 274. [2022-07-20 22:42:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.5457875457875458) internal successors, (422), 273 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 22:42:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 422 transitions. [2022-07-20 22:42:17,088 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 422 transitions. Word has length 85 [2022-07-20 22:42:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:17,088 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 422 transitions. [2022-07-20 22:42:17,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 22:42:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 422 transitions. [2022-07-20 22:42:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-20 22:42:17,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:17,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:17,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 22:42:17,090 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:17,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:17,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1246725502, now seen corresponding path program 1 times [2022-07-20 22:42:17,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:17,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259948677] [2022-07-20 22:42:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:17,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:17,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:17,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259948677] [2022-07-20 22:42:17,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259948677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:17,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:17,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:17,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719052144] [2022-07-20 22:42:17,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:17,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:17,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:17,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:17,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:17,184 INFO L87 Difference]: Start difference. First operand 274 states and 422 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:17,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:17,931 INFO L93 Difference]: Finished difference Result 616 states and 956 transitions. [2022-07-20 22:42:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:17,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-20 22:42:17,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:17,933 INFO L225 Difference]: With dead ends: 616 [2022-07-20 22:42:17,933 INFO L226 Difference]: Without dead ends: 363 [2022-07-20 22:42:17,933 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 22:42:17,934 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 88 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:17,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 523 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:42:17,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-20 22:42:17,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 308. [2022-07-20 22:42:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.5472312703583062) internal successors, (475), 307 states have internal predecessors, (475), 0 states have call successors, (0), 0 states 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 22:42:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 475 transitions. [2022-07-20 22:42:17,939 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 475 transitions. Word has length 113 [2022-07-20 22:42:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:17,940 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 475 transitions. [2022-07-20 22:42:17,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 475 transitions. [2022-07-20 22:42:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-20 22:42:17,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:17,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:17,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:42:17,941 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:17,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1139784004, now seen corresponding path program 1 times [2022-07-20 22:42:17,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:17,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715725069] [2022-07-20 22:42:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:17,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:18,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:18,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715725069] [2022-07-20 22:42:18,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715725069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:18,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:18,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:18,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38024914] [2022-07-20 22:42:18,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:18,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:18,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:18,031 INFO L87 Difference]: Start difference. First operand 308 states and 475 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:18,554 INFO L93 Difference]: Finished difference Result 745 states and 1162 transitions. [2022-07-20 22:42:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-20 22:42:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:18,556 INFO L225 Difference]: With dead ends: 745 [2022-07-20 22:42:18,556 INFO L226 Difference]: Without dead ends: 458 [2022-07-20 22:42:18,557 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 22:42:18,557 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 129 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:18,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 412 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-07-20 22:42:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 338. [2022-07-20 22:42:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.5548961424332344) internal successors, (524), 337 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 22:42:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 524 transitions. [2022-07-20 22:42:18,564 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 524 transitions. Word has length 113 [2022-07-20 22:42:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:18,565 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 524 transitions. [2022-07-20 22:42:18,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 524 transitions. [2022-07-20 22:42:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-20 22:42:18,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:18,566 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, 1, 1, 1, 1, 1, 1, 1, 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 22:42:18,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 22:42:18,566 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash -674265657, now seen corresponding path program 1 times [2022-07-20 22:42:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:18,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375536950] [2022-07-20 22:42:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:18,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:18,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375536950] [2022-07-20 22:42:18,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375536950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:18,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:18,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:18,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692541243] [2022-07-20 22:42:18,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:18,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:18,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:18,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:18,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:18,657 INFO L87 Difference]: Start difference. First operand 338 states and 524 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:19,340 INFO L93 Difference]: Finished difference Result 769 states and 1197 transitions. [2022-07-20 22:42:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:19,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-07-20 22:42:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:19,341 INFO L225 Difference]: With dead ends: 769 [2022-07-20 22:42:19,341 INFO L226 Difference]: Without dead ends: 452 [2022-07-20 22:42:19,342 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 22:42:19,342 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 125 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:19,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 400 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:42:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-07-20 22:42:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 375. [2022-07-20 22:42:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.5588235294117647) internal successors, (583), 374 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 22:42:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 583 transitions. [2022-07-20 22:42:19,349 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 583 transitions. Word has length 119 [2022-07-20 22:42:19,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:19,350 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 583 transitions. [2022-07-20 22:42:19,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 583 transitions. [2022-07-20 22:42:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-20 22:42:19,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:19,351 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:19,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 22:42:19,351 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:19,352 INFO L85 PathProgramCache]: Analyzing trace with hash 622163786, now seen corresponding path program 1 times [2022-07-20 22:42:19,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:19,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213624601] [2022-07-20 22:42:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:19,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:19,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:19,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213624601] [2022-07-20 22:42:19,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213624601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:19,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:19,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:19,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81616507] [2022-07-20 22:42:19,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:19,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:19,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:19,469 INFO L87 Difference]: Start difference. First operand 375 states and 583 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:19,984 INFO L93 Difference]: Finished difference Result 815 states and 1272 transitions. [2022-07-20 22:42:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:19,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-20 22:42:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:19,986 INFO L225 Difference]: With dead ends: 815 [2022-07-20 22:42:19,986 INFO L226 Difference]: Without dead ends: 461 [2022-07-20 22:42:19,986 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 22:42:19,987 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 77 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:19,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 525 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-07-20 22:42:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 415. [2022-07-20 22:42:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.5603864734299517) internal successors, (646), 414 states have internal predecessors, (646), 0 states have call successors, (0), 0 states 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 22:42:19,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 646 transitions. [2022-07-20 22:42:19,995 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 646 transitions. Word has length 120 [2022-07-20 22:42:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:19,995 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 646 transitions. [2022-07-20 22:42:19,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 646 transitions. [2022-07-20 22:42:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-20 22:42:19,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:19,997 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:19,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 22:42:19,997 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:19,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash 649229388, now seen corresponding path program 1 times [2022-07-20 22:42:19,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:19,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958361441] [2022-07-20 22:42:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 22:42:20,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:20,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958361441] [2022-07-20 22:42:20,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958361441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:20,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:20,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:20,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874934994] [2022-07-20 22:42:20,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:20,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:20,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:20,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:20,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:20,100 INFO L87 Difference]: Start difference. First operand 415 states and 646 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:20,606 INFO L93 Difference]: Finished difference Result 846 states and 1321 transitions. [2022-07-20 22:42:20,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:20,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-20 22:42:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:20,608 INFO L225 Difference]: With dead ends: 846 [2022-07-20 22:42:20,608 INFO L226 Difference]: Without dead ends: 452 [2022-07-20 22:42:20,609 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 22:42:20,609 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 28 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:20,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 625 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:20,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-07-20 22:42:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 439. [2022-07-20 22:42:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.5547945205479452) internal successors, (681), 438 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 22:42:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 681 transitions. [2022-07-20 22:42:20,616 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 681 transitions. Word has length 120 [2022-07-20 22:42:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:20,617 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 681 transitions. [2022-07-20 22:42:20,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 681 transitions. [2022-07-20 22:42:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-20 22:42:20,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:20,618 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:20,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 22:42:20,619 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:20,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:20,619 INFO L85 PathProgramCache]: Analyzing trace with hash -370439172, now seen corresponding path program 1 times [2022-07-20 22:42:20,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:20,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73771878] [2022-07-20 22:42:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:20,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:20,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:20,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73771878] [2022-07-20 22:42:20,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73771878] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:20,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:20,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:20,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205059388] [2022-07-20 22:42:20,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:20,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:20,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:20,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:20,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:20,717 INFO L87 Difference]: Start difference. First operand 439 states and 681 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:21,881 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 22:42:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:22,117 INFO L93 Difference]: Finished difference Result 895 states and 1391 transitions. [2022-07-20 22:42:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:22,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-20 22:42:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:22,119 INFO L225 Difference]: With dead ends: 895 [2022-07-20 22:42:22,119 INFO L226 Difference]: Without dead ends: 477 [2022-07-20 22:42:22,119 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 22:42:22,120 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 61 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:22,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 531 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 22:42:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-07-20 22:42:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 442. [2022-07-20 22:42:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.5510204081632653) internal successors, (684), 441 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 22:42:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 684 transitions. [2022-07-20 22:42:22,128 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 684 transitions. Word has length 127 [2022-07-20 22:42:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:22,128 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 684 transitions. [2022-07-20 22:42:22,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 684 transitions. [2022-07-20 22:42:22,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-20 22:42:22,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:22,129 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:22,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-20 22:42:22,130 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:22,130 INFO L85 PathProgramCache]: Analyzing trace with hash -143031650, now seen corresponding path program 1 times [2022-07-20 22:42:22,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:22,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067515435] [2022-07-20 22:42:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:22,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:22,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:22,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067515435] [2022-07-20 22:42:22,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067515435] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:22,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:22,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:22,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040135957] [2022-07-20 22:42:22,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:22,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:22,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:22,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:22,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:22,208 INFO L87 Difference]: Start difference. First operand 442 states and 684 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:22,750 INFO L93 Difference]: Finished difference Result 897 states and 1392 transitions. [2022-07-20 22:42:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:22,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-07-20 22:42:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:22,751 INFO L225 Difference]: With dead ends: 897 [2022-07-20 22:42:22,751 INFO L226 Difference]: Without dead ends: 476 [2022-07-20 22:42:22,752 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 22:42:22,752 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 83 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:22,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 533 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-07-20 22:42:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 442. [2022-07-20 22:42:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.5487528344671202) internal successors, (683), 441 states have internal predecessors, (683), 0 states have call successors, (0), 0 states 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 22:42:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 683 transitions. [2022-07-20 22:42:22,760 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 683 transitions. Word has length 134 [2022-07-20 22:42:22,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:22,760 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 683 transitions. [2022-07-20 22:42:22,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:22,760 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 683 transitions. [2022-07-20 22:42:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-20 22:42:22,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:22,761 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:22,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 22:42:22,762 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:22,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2083613664, now seen corresponding path program 1 times [2022-07-20 22:42:22,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:22,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629293139] [2022-07-20 22:42:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:22,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:22,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:22,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629293139] [2022-07-20 22:42:22,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629293139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:22,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:22,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:22,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939053807] [2022-07-20 22:42:22,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:22,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:22,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:22,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:22,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:22,837 INFO L87 Difference]: Start difference. First operand 442 states and 683 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:23,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:23,985 INFO L93 Difference]: Finished difference Result 875 states and 1358 transitions. [2022-07-20 22:42:23,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:23,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-07-20 22:42:23,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:23,987 INFO L225 Difference]: With dead ends: 875 [2022-07-20 22:42:23,987 INFO L226 Difference]: Without dead ends: 454 [2022-07-20 22:42:23,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:42:23,988 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 33 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:23,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 625 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 22:42:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-20 22:42:23,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 442. [2022-07-20 22:42:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.5464852607709751) internal successors, (682), 441 states have internal predecessors, (682), 0 states have call successors, (0), 0 states 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 22:42:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 682 transitions. [2022-07-20 22:42:23,995 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 682 transitions. Word has length 134 [2022-07-20 22:42:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:23,996 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 682 transitions. [2022-07-20 22:42:23,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 682 transitions. [2022-07-20 22:42:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-20 22:42:23,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:23,997 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:23,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 22:42:23,997 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:23,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:23,998 INFO L85 PathProgramCache]: Analyzing trace with hash -500982677, now seen corresponding path program 1 times [2022-07-20 22:42:23,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:23,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934079058] [2022-07-20 22:42:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:23,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:42:24,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:24,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934079058] [2022-07-20 22:42:24,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934079058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:24,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:24,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:24,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708878398] [2022-07-20 22:42:24,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:24,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:24,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:24,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:24,088 INFO L87 Difference]: Start difference. First operand 442 states and 682 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:24,965 INFO L93 Difference]: Finished difference Result 977 states and 1512 transitions. [2022-07-20 22:42:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:24,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-07-20 22:42:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:24,967 INFO L225 Difference]: With dead ends: 977 [2022-07-20 22:42:24,967 INFO L226 Difference]: Without dead ends: 556 [2022-07-20 22:42:24,968 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 22:42:24,968 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 132 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:24,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 424 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:42:24,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-07-20 22:42:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 472. [2022-07-20 22:42:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.5371549893842889) internal successors, (724), 471 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 724 transitions. [2022-07-20 22:42:24,976 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 724 transitions. Word has length 140 [2022-07-20 22:42:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:24,976 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 724 transitions. [2022-07-20 22:42:24,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 724 transitions. [2022-07-20 22:42:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-20 22:42:24,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:24,978 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:24,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 22:42:24,978 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash -2119848563, now seen corresponding path program 1 times [2022-07-20 22:42:24,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:24,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672637629] [2022-07-20 22:42:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:24,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:42:25,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:25,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672637629] [2022-07-20 22:42:25,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672637629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:25,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:25,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:25,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629507355] [2022-07-20 22:42:25,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:25,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:25,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:25,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:25,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:25,075 INFO L87 Difference]: Start difference. First operand 472 states and 724 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 22:42:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:25,835 INFO L93 Difference]: Finished difference Result 997 states and 1532 transitions. [2022-07-20 22:42:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-07-20 22:42:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:25,837 INFO L225 Difference]: With dead ends: 997 [2022-07-20 22:42:25,837 INFO L226 Difference]: Without dead ends: 546 [2022-07-20 22:42:25,837 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 22:42:25,838 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 131 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:25,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 400 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:42:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-07-20 22:42:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 472. [2022-07-20 22:42:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.5244161358811041) internal successors, (718), 471 states have internal predecessors, (718), 0 states have call successors, (0), 0 states 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 22:42:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 718 transitions. [2022-07-20 22:42:25,845 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 718 transitions. Word has length 141 [2022-07-20 22:42:25,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:25,846 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 718 transitions. [2022-07-20 22:42:25,846 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 22:42:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 718 transitions. [2022-07-20 22:42:25,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 22:42:25,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:25,847 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:25,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-20 22:42:25,847 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:25,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:25,848 INFO L85 PathProgramCache]: Analyzing trace with hash 190412283, now seen corresponding path program 1 times [2022-07-20 22:42:25,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:25,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34748967] [2022-07-20 22:42:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:25,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:25,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:25,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34748967] [2022-07-20 22:42:25,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34748967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:25,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:25,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:25,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568056079] [2022-07-20 22:42:25,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:25,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:25,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:25,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:25,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:25,948 INFO L87 Difference]: Start difference. First operand 472 states and 718 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:27,953 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 22:42:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:28,164 INFO L93 Difference]: Finished difference Result 955 states and 1458 transitions. [2022-07-20 22:42:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:28,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-20 22:42:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:28,166 INFO L225 Difference]: With dead ends: 955 [2022-07-20 22:42:28,166 INFO L226 Difference]: Without dead ends: 504 [2022-07-20 22:42:28,167 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 22:42:28,167 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 73 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:28,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 551 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:42:28,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-20 22:42:28,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 472. [2022-07-20 22:42:28,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.5222929936305734) internal successors, (717), 471 states have internal predecessors, (717), 0 states have call successors, (0), 0 states 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 22:42:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 717 transitions. [2022-07-20 22:42:28,174 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 717 transitions. Word has length 142 [2022-07-20 22:42:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:28,175 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 717 transitions. [2022-07-20 22:42:28,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 717 transitions. [2022-07-20 22:42:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 22:42:28,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:28,176 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:28,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 22:42:28,177 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1221453181, now seen corresponding path program 1 times [2022-07-20 22:42:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:28,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963224184] [2022-07-20 22:42:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 22:42:28,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:28,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963224184] [2022-07-20 22:42:28,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963224184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:28,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:28,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:28,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895286796] [2022-07-20 22:42:28,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:28,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:28,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:28,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:28,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:28,250 INFO L87 Difference]: Start difference. First operand 472 states and 717 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 22:42:28,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:28,300 INFO L93 Difference]: Finished difference Result 1369 states and 2095 transitions. [2022-07-20 22:42:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:28,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-20 22:42:28,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:28,303 INFO L225 Difference]: With dead ends: 1369 [2022-07-20 22:42:28,303 INFO L226 Difference]: Without dead ends: 918 [2022-07-20 22:42:28,304 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 22:42:28,304 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 147 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:28,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 438 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:42:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-07-20 22:42:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 916. [2022-07-20 22:42:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.512568306010929) internal successors, (1384), 915 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states 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 22:42:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1384 transitions. [2022-07-20 22:42:28,317 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1384 transitions. Word has length 142 [2022-07-20 22:42:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:28,317 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1384 transitions. [2022-07-20 22:42:28,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 22:42:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1384 transitions. [2022-07-20 22:42:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 22:42:28,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:28,335 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:28,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-20 22:42:28,336 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:28,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1645099903, now seen corresponding path program 1 times [2022-07-20 22:42:28,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:28,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142907927] [2022-07-20 22:42:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:28,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 22:42:28,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:28,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142907927] [2022-07-20 22:42:28,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142907927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:28,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:28,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:28,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220487662] [2022-07-20 22:42:28,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:28,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:28,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:28,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:28,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:28,415 INFO L87 Difference]: Start difference. First operand 916 states and 1384 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 22:42:29,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:30,057 INFO L93 Difference]: Finished difference Result 1892 states and 2861 transitions. [2022-07-20 22:42:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:30,057 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 142 [2022-07-20 22:42:30,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:30,060 INFO L225 Difference]: With dead ends: 1892 [2022-07-20 22:42:30,060 INFO L226 Difference]: Without dead ends: 997 [2022-07-20 22:42:30,061 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 22:42:30,061 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 31 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:30,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 625 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 22:42:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-07-20 22:42:30,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 968. [2022-07-20 22:42:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 1.5118924508790073) internal successors, (1462), 967 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states 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 22:42:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1462 transitions. [2022-07-20 22:42:30,075 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1462 transitions. Word has length 142 [2022-07-20 22:42:30,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:30,075 INFO L495 AbstractCegarLoop]: Abstraction has 968 states and 1462 transitions. [2022-07-20 22:42:30,076 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 22:42:30,076 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1462 transitions. [2022-07-20 22:42:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-20 22:42:30,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:30,078 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:30,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-20 22:42:30,078 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1018768782, now seen corresponding path program 1 times [2022-07-20 22:42:30,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:30,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159615049] [2022-07-20 22:42:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:42:30,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:30,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159615049] [2022-07-20 22:42:30,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159615049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:30,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:30,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:30,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605231533] [2022-07-20 22:42:30,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:30,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:30,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:30,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:30,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:30,169 INFO L87 Difference]: Start difference. First operand 968 states and 1462 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:30,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:30,715 INFO L93 Difference]: Finished difference Result 2138 states and 3221 transitions. [2022-07-20 22:42:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:30,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-20 22:42:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:30,719 INFO L225 Difference]: With dead ends: 2138 [2022-07-20 22:42:30,719 INFO L226 Difference]: Without dead ends: 1191 [2022-07-20 22:42:30,720 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 22:42:30,720 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 133 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:30,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 424 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:30,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-07-20 22:42:30,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1024. [2022-07-20 22:42:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.501466275659824) internal successors, (1536), 1023 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states 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 22:42:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1536 transitions. [2022-07-20 22:42:30,735 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1536 transitions. Word has length 144 [2022-07-20 22:42:30,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:30,736 INFO L495 AbstractCegarLoop]: Abstraction has 1024 states and 1536 transitions. [2022-07-20 22:42:30,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:30,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1536 transitions. [2022-07-20 22:42:30,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-20 22:42:30,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:30,738 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:30,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-20 22:42:30,738 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:30,738 INFO L85 PathProgramCache]: Analyzing trace with hash -271637232, now seen corresponding path program 1 times [2022-07-20 22:42:30,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:30,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027174245] [2022-07-20 22:42:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:30,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:42:30,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027174245] [2022-07-20 22:42:30,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027174245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:30,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:30,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:30,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875457108] [2022-07-20 22:42:30,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:30,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:30,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:30,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:30,844 INFO L87 Difference]: Start difference. First operand 1024 states and 1536 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:31,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:31,500 INFO L93 Difference]: Finished difference Result 2074 states and 3108 transitions. [2022-07-20 22:42:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:31,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2022-07-20 22:42:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:31,503 INFO L225 Difference]: With dead ends: 2074 [2022-07-20 22:42:31,503 INFO L226 Difference]: Without dead ends: 1071 [2022-07-20 22:42:31,504 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 22:42:31,504 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 57 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:31,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 569 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-07-20 22:42:31,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1024. [2022-07-20 22:42:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.4995112414467253) internal successors, (1534), 1023 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states 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 22:42:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1534 transitions. [2022-07-20 22:42:31,519 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1534 transitions. Word has length 145 [2022-07-20 22:42:31,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:31,519 INFO L495 AbstractCegarLoop]: Abstraction has 1024 states and 1534 transitions. [2022-07-20 22:42:31,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:31,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1534 transitions. [2022-07-20 22:42:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-20 22:42:31,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:31,521 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:31,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-20 22:42:31,521 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1688759630, now seen corresponding path program 1 times [2022-07-20 22:42:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:31,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341607705] [2022-07-20 22:42:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:31,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:31,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:31,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341607705] [2022-07-20 22:42:31,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341607705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:31,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:31,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:31,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531549178] [2022-07-20 22:42:31,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:31,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:31,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:31,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:31,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:31,600 INFO L87 Difference]: Start difference. First operand 1024 states and 1534 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:33,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:33,915 INFO L93 Difference]: Finished difference Result 2170 states and 3241 transitions. [2022-07-20 22:42:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-07-20 22:42:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:33,918 INFO L225 Difference]: With dead ends: 2170 [2022-07-20 22:42:33,918 INFO L226 Difference]: Without dead ends: 1167 [2022-07-20 22:42:33,919 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 22:42:33,919 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 135 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:33,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 404 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:42:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-07-20 22:42:33,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1024. [2022-07-20 22:42:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.4838709677419355) internal successors, (1518), 1023 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states 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 22:42:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1518 transitions. [2022-07-20 22:42:33,934 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1518 transitions. Word has length 148 [2022-07-20 22:42:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:33,935 INFO L495 AbstractCegarLoop]: Abstraction has 1024 states and 1518 transitions. [2022-07-20 22:42:33,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1518 transitions. [2022-07-20 22:42:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-20 22:42:33,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:33,937 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:33,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-20 22:42:33,937 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:33,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:33,937 INFO L85 PathProgramCache]: Analyzing trace with hash 267139220, now seen corresponding path program 1 times [2022-07-20 22:42:33,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:33,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660362146] [2022-07-20 22:42:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:33,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:34,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:34,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660362146] [2022-07-20 22:42:34,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660362146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:34,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:34,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:34,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832777464] [2022-07-20 22:42:34,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:34,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:34,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:34,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:34,017 INFO L87 Difference]: Start difference. First operand 1024 states and 1518 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:35,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:35,209 INFO L93 Difference]: Finished difference Result 2170 states and 3209 transitions. [2022-07-20 22:42:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:35,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-07-20 22:42:35,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:35,212 INFO L225 Difference]: With dead ends: 2170 [2022-07-20 22:42:35,212 INFO L226 Difference]: Without dead ends: 1167 [2022-07-20 22:42:35,213 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 22:42:35,213 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 134 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:35,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 400 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 22:42:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-07-20 22:42:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1024. [2022-07-20 22:42:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.4682306940371457) internal successors, (1502), 1023 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states 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 22:42:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1502 transitions. [2022-07-20 22:42:35,229 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1502 transitions. Word has length 149 [2022-07-20 22:42:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:35,230 INFO L495 AbstractCegarLoop]: Abstraction has 1024 states and 1502 transitions. [2022-07-20 22:42:35,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:35,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1502 transitions. [2022-07-20 22:42:35,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-20 22:42:35,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:35,232 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:35,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-20 22:42:35,232 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:35,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1679866725, now seen corresponding path program 1 times [2022-07-20 22:42:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:35,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737047666] [2022-07-20 22:42:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:35,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-20 22:42:35,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:35,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737047666] [2022-07-20 22:42:35,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737047666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:35,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:35,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:35,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460709536] [2022-07-20 22:42:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:35,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:35,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:35,326 INFO L87 Difference]: Start difference. First operand 1024 states and 1502 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 22:42:36,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:36,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:36,800 INFO L93 Difference]: Finished difference Result 2250 states and 3295 transitions. [2022-07-20 22:42:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:36,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-07-20 22:42:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:36,804 INFO L225 Difference]: With dead ends: 2250 [2022-07-20 22:42:36,804 INFO L226 Difference]: Without dead ends: 1247 [2022-07-20 22:42:36,805 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 22:42:36,805 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 125 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:36,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 400 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 22:42:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-07-20 22:42:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1094. [2022-07-20 22:42:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 1.4620311070448306) internal successors, (1598), 1093 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states 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 22:42:36,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1598 transitions. [2022-07-20 22:42:36,822 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1598 transitions. Word has length 152 [2022-07-20 22:42:36,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:36,822 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 1598 transitions. [2022-07-20 22:42:36,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 22:42:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1598 transitions. [2022-07-20 22:42:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-20 22:42:36,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:36,824 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:36,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-20 22:42:36,825 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:36,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:36,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1338024491, now seen corresponding path program 1 times [2022-07-20 22:42:36,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:36,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009976274] [2022-07-20 22:42:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:36,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:36,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009976274] [2022-07-20 22:42:36,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009976274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:36,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:36,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:36,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918657291] [2022-07-20 22:42:36,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:36,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:36,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:36,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:36,938 INFO L87 Difference]: Start difference. First operand 1094 states and 1598 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:38,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:38,650 INFO L93 Difference]: Finished difference Result 2390 states and 3487 transitions. [2022-07-20 22:42:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:38,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-07-20 22:42:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:38,654 INFO L225 Difference]: With dead ends: 2390 [2022-07-20 22:42:38,654 INFO L226 Difference]: Without dead ends: 1317 [2022-07-20 22:42:38,655 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 22:42:38,655 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 127 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:38,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 410 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-20 22:42:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-07-20 22:42:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1160. [2022-07-20 22:42:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 1.454702329594478) internal successors, (1686), 1159 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 22:42:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1686 transitions. [2022-07-20 22:42:38,672 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1686 transitions. Word has length 152 [2022-07-20 22:42:38,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:38,673 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1686 transitions. [2022-07-20 22:42:38,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1686 transitions. [2022-07-20 22:42:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-20 22:42:38,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:38,675 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:38,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-20 22:42:38,675 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:38,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash 523078130, now seen corresponding path program 1 times [2022-07-20 22:42:38,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:38,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761262816] [2022-07-20 22:42:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:38,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:38,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:38,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761262816] [2022-07-20 22:42:38,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761262816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:38,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:38,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:38,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78085303] [2022-07-20 22:42:38,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:38,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:38,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:38,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:38,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:38,757 INFO L87 Difference]: Start difference. First operand 1160 states and 1686 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 22:42:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:39,200 INFO L93 Difference]: Finished difference Result 2330 states and 3386 transitions. [2022-07-20 22:42:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:39,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-07-20 22:42:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:39,203 INFO L225 Difference]: With dead ends: 2330 [2022-07-20 22:42:39,204 INFO L226 Difference]: Without dead ends: 1191 [2022-07-20 22:42:39,205 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 22:42:39,205 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 39 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:39,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 579 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:42:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-07-20 22:42:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1160. [2022-07-20 22:42:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 1.45297670405522) internal successors, (1684), 1159 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states 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 22:42:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1684 transitions. [2022-07-20 22:42:39,223 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1684 transitions. Word has length 153 [2022-07-20 22:42:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:39,223 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1684 transitions. [2022-07-20 22:42:39,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 22:42:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1684 transitions. [2022-07-20 22:42:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-20 22:42:39,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:39,225 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:39,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-20 22:42:39,225 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:39,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1944185570, now seen corresponding path program 1 times [2022-07-20 22:42:39,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:39,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850381379] [2022-07-20 22:42:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:39,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-20 22:42:39,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:39,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850381379] [2022-07-20 22:42:39,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850381379] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:39,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:39,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328982040] [2022-07-20 22:42:39,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:39,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:39,303 INFO L87 Difference]: Start difference. First operand 1160 states and 1684 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 22:42:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:40,479 INFO L93 Difference]: Finished difference Result 2324 states and 3375 transitions. [2022-07-20 22:42:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:40,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-07-20 22:42:40,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:40,482 INFO L225 Difference]: With dead ends: 2324 [2022-07-20 22:42:40,483 INFO L226 Difference]: Without dead ends: 1185 [2022-07-20 22:42:40,484 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 22:42:40,484 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 33 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:40,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 581 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 22:42:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-20 22:42:40,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1160. [2022-07-20 22:42:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 1.451251078515962) internal successors, (1682), 1159 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states 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 22:42:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1682 transitions. [2022-07-20 22:42:40,513 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1682 transitions. Word has length 153 [2022-07-20 22:42:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:40,513 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1682 transitions. [2022-07-20 22:42:40,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 22:42:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1682 transitions. [2022-07-20 22:42:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-20 22:42:40,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:40,516 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:40,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-20 22:42:40,516 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:40,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:40,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2133855853, now seen corresponding path program 1 times [2022-07-20 22:42:40,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:40,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683279036] [2022-07-20 22:42:40,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:40,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-20 22:42:40,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:40,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683279036] [2022-07-20 22:42:40,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683279036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:40,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:40,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:40,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094379641] [2022-07-20 22:42:40,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:40,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:40,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:40,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:40,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:40,603 INFO L87 Difference]: Start difference. First operand 1160 states and 1682 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:42,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:42,629 INFO L93 Difference]: Finished difference Result 2458 states and 3563 transitions. [2022-07-20 22:42:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:42,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-07-20 22:42:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:42,633 INFO L225 Difference]: With dead ends: 2458 [2022-07-20 22:42:42,633 INFO L226 Difference]: Without dead ends: 1319 [2022-07-20 22:42:42,634 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 22:42:42,634 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 68 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:42,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 597 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 22:42:42,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-07-20 22:42:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1236. [2022-07-20 22:42:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 1.4493927125506072) internal successors, (1790), 1235 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states 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 22:42:42,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1790 transitions. [2022-07-20 22:42:42,653 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1790 transitions. Word has length 156 [2022-07-20 22:42:42,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:42,653 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 1790 transitions. [2022-07-20 22:42:42,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:42,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1790 transitions. [2022-07-20 22:42:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-20 22:42:42,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:42,655 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:42,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-20 22:42:42,655 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:42,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:42,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1852047201, now seen corresponding path program 1 times [2022-07-20 22:42:42,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:42,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342990553] [2022-07-20 22:42:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:42,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 22:42:42,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:42,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342990553] [2022-07-20 22:42:42,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342990553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:42,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:42,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:42,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554034053] [2022-07-20 22:42:42,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:42,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:42,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:42,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:42,736 INFO L87 Difference]: Start difference. First operand 1236 states and 1790 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:42,772 INFO L93 Difference]: Finished difference Result 2478 states and 3592 transitions. [2022-07-20 22:42:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:42,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2022-07-20 22:42:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:42,789 INFO L225 Difference]: With dead ends: 2478 [2022-07-20 22:42:42,789 INFO L226 Difference]: Without dead ends: 1263 [2022-07-20 22:42:42,790 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 22:42:42,791 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:42,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 426 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:42:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-07-20 22:42:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1263. [2022-07-20 22:42:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 1.4461172741679873) internal successors, (1825), 1262 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states 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 22:42:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1825 transitions. [2022-07-20 22:42:42,810 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1825 transitions. Word has length 161 [2022-07-20 22:42:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:42,810 INFO L495 AbstractCegarLoop]: Abstraction has 1263 states and 1825 transitions. [2022-07-20 22:42:42,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1825 transitions. [2022-07-20 22:42:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-20 22:42:42,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:42,812 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:42,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-20 22:42:42,812 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:42,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2032309729, now seen corresponding path program 1 times [2022-07-20 22:42:42,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:42,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231975652] [2022-07-20 22:42:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:42,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-20 22:42:42,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:42,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231975652] [2022-07-20 22:42:42,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231975652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:42,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:42,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:42,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639548980] [2022-07-20 22:42:42,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:42,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:42,898 INFO L87 Difference]: Start difference. First operand 1263 states and 1825 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 22:42:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:42,931 INFO L93 Difference]: Finished difference Result 2507 states and 3628 transitions. [2022-07-20 22:42:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:42,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 161 [2022-07-20 22:42:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:42,933 INFO L225 Difference]: With dead ends: 2507 [2022-07-20 22:42:42,933 INFO L226 Difference]: Without dead ends: 1265 [2022-07-20 22:42:42,934 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 22:42:42,940 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:42,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 405 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:42:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-07-20 22:42:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1265. [2022-07-20 22:42:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 1.4454113924050633) internal successors, (1827), 1264 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states 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 22:42:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1827 transitions. [2022-07-20 22:42:42,972 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1827 transitions. Word has length 161 [2022-07-20 22:42:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:42,973 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 1827 transitions. [2022-07-20 22:42:42,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 22:42:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1827 transitions. [2022-07-20 22:42:42,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-20 22:42:42,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:42,974 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:42,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-20 22:42:42,975 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:42,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:42,975 INFO L85 PathProgramCache]: Analyzing trace with hash 813807070, now seen corresponding path program 1 times [2022-07-20 22:42:42,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:42,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966992953] [2022-07-20 22:42:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:42,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 22:42:43,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966992953] [2022-07-20 22:42:43,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966992953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:43,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:43,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:43,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630816146] [2022-07-20 22:42:43,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:43,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:43,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:43,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:43,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:43,058 INFO L87 Difference]: Start difference. First operand 1265 states and 1827 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 22:42:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:43,654 INFO L93 Difference]: Finished difference Result 2651 states and 3826 transitions. [2022-07-20 22:42:43,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:43,654 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 163 [2022-07-20 22:42:43,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:43,656 INFO L225 Difference]: With dead ends: 2651 [2022-07-20 22:42:43,656 INFO L226 Difference]: Without dead ends: 1409 [2022-07-20 22:42:43,657 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 22:42:43,658 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 121 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:43,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 400 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-07-20 22:42:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1189. [2022-07-20 22:42:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 1.4436026936026936) internal successors, (1715), 1188 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states 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 22:42:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1715 transitions. [2022-07-20 22:42:43,689 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1715 transitions. Word has length 163 [2022-07-20 22:42:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:43,689 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 1715 transitions. [2022-07-20 22:42:43,689 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 22:42:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1715 transitions. [2022-07-20 22:42:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-07-20 22:42:43,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:43,691 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:43,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-20 22:42:43,691 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1991742780, now seen corresponding path program 1 times [2022-07-20 22:42:43,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:43,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235871384] [2022-07-20 22:42:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:43,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-20 22:42:43,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:43,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235871384] [2022-07-20 22:42:43,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235871384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:43,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:43,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:43,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885852380] [2022-07-20 22:42:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:43,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:43,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:43,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:43,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:43,779 INFO L87 Difference]: Start difference. First operand 1189 states and 1715 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:44,577 INFO L93 Difference]: Finished difference Result 2515 states and 3626 transitions. [2022-07-20 22:42:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:44,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-07-20 22:42:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:44,579 INFO L225 Difference]: With dead ends: 2515 [2022-07-20 22:42:44,579 INFO L226 Difference]: Without dead ends: 1349 [2022-07-20 22:42:44,580 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 22:42:44,581 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 62 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:44,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 599 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:42:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2022-07-20 22:42:44,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1275. [2022-07-20 22:42:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 1.4419152276295133) internal successors, (1837), 1274 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states 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 22:42:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 1837 transitions. [2022-07-20 22:42:44,599 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 1837 transitions. Word has length 165 [2022-07-20 22:42:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:44,599 INFO L495 AbstractCegarLoop]: Abstraction has 1275 states and 1837 transitions. [2022-07-20 22:42:44,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 1837 transitions. [2022-07-20 22:42:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-20 22:42:44,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:44,601 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:44,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-20 22:42:44,601 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash -204178227, now seen corresponding path program 1 times [2022-07-20 22:42:44,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:44,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610236773] [2022-07-20 22:42:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-20 22:42:44,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:44,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610236773] [2022-07-20 22:42:44,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610236773] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:44,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:44,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:44,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885556440] [2022-07-20 22:42:44,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:44,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:44,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:44,699 INFO L87 Difference]: Start difference. First operand 1275 states and 1837 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 22:42:45,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:45,131 INFO L93 Difference]: Finished difference Result 2591 states and 3733 transitions. [2022-07-20 22:42:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:45,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2022-07-20 22:42:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:45,134 INFO L225 Difference]: With dead ends: 2591 [2022-07-20 22:42:45,134 INFO L226 Difference]: Without dead ends: 1335 [2022-07-20 22:42:45,135 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 22:42:45,135 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 54 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:45,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 601 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:42:45,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-07-20 22:42:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1273. [2022-07-20 22:42:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 1.4410377358490567) internal successors, (1833), 1272 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states 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 22:42:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1833 transitions. [2022-07-20 22:42:45,154 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1833 transitions. Word has length 166 [2022-07-20 22:42:45,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:45,154 INFO L495 AbstractCegarLoop]: Abstraction has 1273 states and 1833 transitions. [2022-07-20 22:42:45,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 22:42:45,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1833 transitions. [2022-07-20 22:42:45,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-20 22:42:45,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:45,156 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:45,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-20 22:42:45,156 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:45,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:45,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1438223023, now seen corresponding path program 1 times [2022-07-20 22:42:45,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:45,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785105238] [2022-07-20 22:42:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:45,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-07-20 22:42:45,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:45,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785105238] [2022-07-20 22:42:45,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785105238] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:45,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:45,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:42:45,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024569504] [2022-07-20 22:42:45,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:45,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:42:45,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:42:45,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:42:45,401 INFO L87 Difference]: Start difference. First operand 1273 states and 1833 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:47,750 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 22:42:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:47,995 INFO L93 Difference]: Finished difference Result 2543 states and 3662 transitions. [2022-07-20 22:42:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:42:47,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2022-07-20 22:42:47,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:47,997 INFO L225 Difference]: With dead ends: 2543 [2022-07-20 22:42:47,997 INFO L226 Difference]: Without dead ends: 1273 [2022-07-20 22:42:47,998 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 22:42:47,998 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 7 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:47,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 735 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 22:42:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-07-20 22:42:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1273. [2022-07-20 22:42:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 1.440251572327044) internal successors, (1832), 1272 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states 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 22:42:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1832 transitions. [2022-07-20 22:42:48,015 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1832 transitions. Word has length 172 [2022-07-20 22:42:48,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:48,015 INFO L495 AbstractCegarLoop]: Abstraction has 1273 states and 1832 transitions. [2022-07-20 22:42:48,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:48,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1832 transitions. [2022-07-20 22:42:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-20 22:42:48,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:48,017 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:48,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-20 22:42:48,018 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:48,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:48,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1353645967, now seen corresponding path program 1 times [2022-07-20 22:42:48,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:48,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211056969] [2022-07-20 22:42:48,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:48,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 146 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 22:42:48,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:48,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211056969] [2022-07-20 22:42:48,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211056969] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:42:48,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360940625] [2022-07-20 22:42:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:48,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:42:48,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:42:48,523 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 22:42:48,567 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 22:42:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:49,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 190 conjunts are in the unsatisfiable core [2022-07-20 22:42:49,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:42:49,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:42:49,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:42:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:42:49,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:42:49,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:42:49,910 INFO L356 Elim1Store]: treesize reduction 1040, result has 8.0 percent of original size [2022-07-20 22:42:49,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 10489949 treesize of output 1501285 [2022-07-20 22:42:51,151 INFO L190 IndexEqualityManager]: detected not equals via solver