./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:02:00,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:02:00,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:02:00,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:02:00,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:02:00,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:02:00,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:02:00,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:02:00,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:02:00,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:02:00,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:02:00,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:02:00,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:02:00,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:02:00,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:02:00,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:02:00,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:02:00,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:02:00,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:02:00,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:02:00,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:02:00,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:02:00,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:02:00,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:02:00,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:02:00,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:02:00,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:02:00,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:02:00,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:02:00,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:02:00,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:02:00,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:02:00,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:02:00,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:02:00,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:02:00,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:02:00,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:02:00,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:02:00,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:02:00,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:02:00,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:02:00,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:02:00,390 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:02:00,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:02:00,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:02:00,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:02:00,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:02:00,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:02:00,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:02:00,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:02:00,392 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:02:00,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:02:00,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:02:00,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:02:00,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:02:00,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:02:00,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:02:00,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:02:00,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:02:00,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:02:00,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:02:00,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:02:00,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:02:00,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:02:00,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:02:00,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:02:00,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:02:00,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:02:00,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:02:00,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:02:00,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:02:00,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:02:00,396 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:02:00,396 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:02:00,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:02:00,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:02:00,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 [2021-12-15 22:02:00,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:02:00,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:02:00,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:02:00,608 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:02:00,608 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:02:00,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-12-15 22:02:00,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30109c704/95af7b98eb174328896514ed57ce3c6a/FLAGb8f2fc516 [2021-12-15 22:02:01,093 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:02:01,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-12-15 22:02:01,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30109c704/95af7b98eb174328896514ed57ce3c6a/FLAGb8f2fc516 [2021-12-15 22:02:01,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30109c704/95af7b98eb174328896514ed57ce3c6a [2021-12-15 22:02:01,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:02:01,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:02:01,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:02:01,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:02:01,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:02:01,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:01,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@698c0b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01, skipping insertion in model container [2021-12-15 22:02:01,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:01,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:02:01,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:02:01,803 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.11.i.cil-2.c[74369,74382] [2021-12-15 22:02:01,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:02:01,824 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:02:01,900 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.11.i.cil-2.c[74369,74382] [2021-12-15 22:02:01,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:02:01,914 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:02:01,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01 WrapperNode [2021-12-15 22:02:01,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:02:01,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:02:01,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:02:01,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:02:01,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:01,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:01,992 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2021-12-15 22:02:01,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:02:01,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:02:01,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:02:01,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:02:02,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:02,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:02,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:02,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:02,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:02,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:02,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:02,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:02:02,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:02:02,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:02:02,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:02:02,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01" (1/1) ... [2021-12-15 22:02:02,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:02:02,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:02:02,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 22:02:02,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 22:02:02,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:02:02,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 22:02:02,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 22:02:02,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 22:02:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 22:02:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:02:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 22:02:02,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:02:02,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:02:02,256 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:02:02,257 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:02:02,268 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 22:02:03,646 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-15 22:02:03,647 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-15 22:02:03,647 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:02:03,655 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:02:03,656 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:02:03,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:02:03 BoogieIcfgContainer [2021-12-15 22:02:03,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:02:03,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:02:03,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:02:03,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:02:03,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:02:01" (1/3) ... [2021-12-15 22:02:03,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7b86e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:02:03, skipping insertion in model container [2021-12-15 22:02:03,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:01" (2/3) ... [2021-12-15 22:02:03,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7b86e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:02:03, skipping insertion in model container [2021-12-15 22:02:03,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:02:03" (3/3) ... [2021-12-15 22:02:03,664 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.11.i.cil-2.c [2021-12-15 22:02:03,667 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:02:03,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:02:03,699 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:02:03,703 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 22:02:03,704 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:02:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:03,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 22:02:03,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:03,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:03,730 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:03,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:03,733 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-12-15 22:02:03,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:03,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345782391] [2021-12-15 22:02:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:03,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:04,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:04,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345782391] [2021-12-15 22:02:04,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345782391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:04,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:04,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:04,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117395488] [2021-12-15 22:02:04,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:04,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:04,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:04,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:04,060 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 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 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:05,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:05,395 INFO L93 Difference]: Finished difference Result 325 states and 550 transitions. [2021-12-15 22:02:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:05,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 22:02:05,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:05,404 INFO L225 Difference]: With dead ends: 325 [2021-12-15 22:02:05,404 INFO L226 Difference]: Without dead ends: 165 [2021-12-15 22:02:05,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:05,409 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 36 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:05,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 585 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 22:02:05,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-15 22:02:05,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-12-15 22:02:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5578231292517006) internal successors, (229), 147 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 229 transitions. [2021-12-15 22:02:05,450 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 229 transitions. Word has length 37 [2021-12-15 22:02:05,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:05,451 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 229 transitions. [2021-12-15 22:02:05,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 229 transitions. [2021-12-15 22:02:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-15 22:02:05,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:05,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:05,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:02:05,455 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1650885502, now seen corresponding path program 1 times [2021-12-15 22:02:05,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:05,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384103513] [2021-12-15 22:02:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:05,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:05,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:05,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384103513] [2021-12-15 22:02:05,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384103513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:05,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:05,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:05,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135355828] [2021-12-15 22:02:05,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:05,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:05,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:05,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:05,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:05,625 INFO L87 Difference]: Start difference. First operand 148 states and 229 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:06,730 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2021-12-15 22:02:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:06,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-15 22:02:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:06,732 INFO L225 Difference]: With dead ends: 292 [2021-12-15 22:02:06,732 INFO L226 Difference]: Without dead ends: 165 [2021-12-15 22:02:06,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:06,733 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 24 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:06,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 471 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 22:02:06,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-15 22:02:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-12-15 22:02:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5510204081632653) internal successors, (228), 147 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 228 transitions. [2021-12-15 22:02:06,741 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 228 transitions. Word has length 50 [2021-12-15 22:02:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:06,742 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 228 transitions. [2021-12-15 22:02:06,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 228 transitions. [2021-12-15 22:02:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 22:02:06,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:06,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:06,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:02:06,744 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash -24642669, now seen corresponding path program 1 times [2021-12-15 22:02:06,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:06,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524743921] [2021-12-15 22:02:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:06,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:06,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:06,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524743921] [2021-12-15 22:02:06,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524743921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:06,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:06,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:06,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767038494] [2021-12-15 22:02:06,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:06,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:06,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:06,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:06,832 INFO L87 Difference]: Start difference. First operand 148 states and 228 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:07,396 INFO L93 Difference]: Finished difference Result 291 states and 444 transitions. [2021-12-15 22:02:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:07,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-15 22:02:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:07,398 INFO L225 Difference]: With dead ends: 291 [2021-12-15 22:02:07,398 INFO L226 Difference]: Without dead ends: 164 [2021-12-15 22:02:07,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:07,399 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:07,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:02:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-15 22:02:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-12-15 22:02:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5442176870748299) internal successors, (227), 147 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 227 transitions. [2021-12-15 22:02:07,406 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 227 transitions. Word has length 51 [2021-12-15 22:02:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:07,407 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 227 transitions. [2021-12-15 22:02:07,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 227 transitions. [2021-12-15 22:02:07,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 22:02:07,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:07,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:07,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:02:07,408 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:07,409 INFO L85 PathProgramCache]: Analyzing trace with hash 840936487, now seen corresponding path program 1 times [2021-12-15 22:02:07,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:07,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612469771] [2021-12-15 22:02:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:07,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:07,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:07,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612469771] [2021-12-15 22:02:07,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612469771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:07,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:07,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:07,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895528214] [2021-12-15 22:02:07,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:07,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:07,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:07,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:07,483 INFO L87 Difference]: Start difference. First operand 148 states and 227 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:09,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:09,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:09,733 INFO L93 Difference]: Finished difference Result 291 states and 443 transitions. [2021-12-15 22:02:09,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:09,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-15 22:02:09,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:09,734 INFO L225 Difference]: With dead ends: 291 [2021-12-15 22:02:09,734 INFO L226 Difference]: Without dead ends: 164 [2021-12-15 22:02:09,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:09,736 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 26 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:09,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-15 22:02:09,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-12-15 22:02:09,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5374149659863945) internal successors, (226), 147 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 226 transitions. [2021-12-15 22:02:09,742 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 226 transitions. Word has length 51 [2021-12-15 22:02:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:09,742 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 226 transitions. [2021-12-15 22:02:09,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:09,742 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 226 transitions. [2021-12-15 22:02:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 22:02:09,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:09,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:09,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:02:09,744 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:09,744 INFO L85 PathProgramCache]: Analyzing trace with hash 451751422, now seen corresponding path program 1 times [2021-12-15 22:02:09,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:09,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052779475] [2021-12-15 22:02:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:09,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:09,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:09,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052779475] [2021-12-15 22:02:09,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052779475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:09,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:09,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:09,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819714534] [2021-12-15 22:02:09,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:09,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:09,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:09,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:09,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:09,824 INFO L87 Difference]: Start difference. First operand 148 states and 226 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:10,990 INFO L93 Difference]: Finished difference Result 393 states and 607 transitions. [2021-12-15 22:02:10,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:10,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-15 22:02:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:10,992 INFO L225 Difference]: With dead ends: 393 [2021-12-15 22:02:10,992 INFO L226 Difference]: Without dead ends: 266 [2021-12-15 22:02:10,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:10,993 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 332 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 [2021-12-15 22:02:10,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 22:02:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-15 22:02:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-15 22:02:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5454545454545454) internal successors, (255), 165 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 255 transitions. [2021-12-15 22:02:11,000 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 255 transitions. Word has length 51 [2021-12-15 22:02:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:11,000 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 255 transitions. [2021-12-15 22:02:11,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 255 transitions. [2021-12-15 22:02:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 22:02:11,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:11,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:11,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:02:11,002 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:11,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:11,002 INFO L85 PathProgramCache]: Analyzing trace with hash -88394050, now seen corresponding path program 1 times [2021-12-15 22:02:11,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:11,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141788802] [2021-12-15 22:02:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:11,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:11,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:11,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141788802] [2021-12-15 22:02:11,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141788802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:11,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:11,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:11,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324400080] [2021-12-15 22:02:11,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:11,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:11,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:11,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:11,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:11,093 INFO L87 Difference]: Start difference. First operand 166 states and 255 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:12,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:12,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:12,404 INFO L93 Difference]: Finished difference Result 411 states and 635 transitions. [2021-12-15 22:02:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:12,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-15 22:02:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:12,406 INFO L225 Difference]: With dead ends: 411 [2021-12-15 22:02:12,406 INFO L226 Difference]: Without dead ends: 266 [2021-12-15 22:02:12,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:12,406 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:12,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 22:02:12,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-15 22:02:12,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-15 22:02:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5333333333333334) internal successors, (253), 165 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 253 transitions. [2021-12-15 22:02:12,418 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 253 transitions. Word has length 51 [2021-12-15 22:02:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:12,418 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 253 transitions. [2021-12-15 22:02:12,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:12,418 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 253 transitions. [2021-12-15 22:02:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 22:02:12,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:12,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:12,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:02:12,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash -388419541, now seen corresponding path program 1 times [2021-12-15 22:02:12,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:12,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870915515] [2021-12-15 22:02:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:12,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:12,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:12,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870915515] [2021-12-15 22:02:12,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870915515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:12,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:12,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:12,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455538485] [2021-12-15 22:02:12,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:12,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:12,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:12,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:12,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:12,500 INFO L87 Difference]: Start difference. First operand 166 states and 253 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:14,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:14,719 INFO L93 Difference]: Finished difference Result 411 states and 632 transitions. [2021-12-15 22:02:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:14,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-15 22:02:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:14,721 INFO L225 Difference]: With dead ends: 411 [2021-12-15 22:02:14,721 INFO L226 Difference]: Without dead ends: 266 [2021-12-15 22:02:14,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:14,722 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 148 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:14,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:14,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-15 22:02:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-15 22:02:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5212121212121212) internal successors, (251), 165 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 251 transitions. [2021-12-15 22:02:14,727 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 251 transitions. Word has length 52 [2021-12-15 22:02:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:14,727 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 251 transitions. [2021-12-15 22:02:14,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 251 transitions. [2021-12-15 22:02:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-15 22:02:14,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:14,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:14,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:02:14,728 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:14,729 INFO L85 PathProgramCache]: Analyzing trace with hash -162201364, now seen corresponding path program 1 times [2021-12-15 22:02:14,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:14,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487671817] [2021-12-15 22:02:14,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:14,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:14,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:14,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487671817] [2021-12-15 22:02:14,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487671817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:14,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:14,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:14,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522635067] [2021-12-15 22:02:14,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:14,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:14,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:14,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:14,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:14,830 INFO L87 Difference]: Start difference. First operand 166 states and 251 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:16,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:16,958 INFO L93 Difference]: Finished difference Result 411 states and 629 transitions. [2021-12-15 22:02:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:16,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-15 22:02:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:16,959 INFO L225 Difference]: With dead ends: 411 [2021-12-15 22:02:16,959 INFO L226 Difference]: Without dead ends: 266 [2021-12-15 22:02:16,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:16,960 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 146 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:16,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 22:02:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-15 22:02:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-15 22:02:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.509090909090909) internal successors, (249), 165 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 249 transitions. [2021-12-15 22:02:16,965 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 249 transitions. Word has length 53 [2021-12-15 22:02:16,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:16,965 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 249 transitions. [2021-12-15 22:02:16,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 249 transitions. [2021-12-15 22:02:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 22:02:16,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:16,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:16,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:02:16,966 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2057823088, now seen corresponding path program 1 times [2021-12-15 22:02:16,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:16,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608287183] [2021-12-15 22:02:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:16,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:17,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:17,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608287183] [2021-12-15 22:02:17,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608287183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:17,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:17,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:17,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540352441] [2021-12-15 22:02:17,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:17,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:17,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:17,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:17,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:17,031 INFO L87 Difference]: Start difference. First operand 166 states and 249 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:19,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:19,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:19,203 INFO L93 Difference]: Finished difference Result 314 states and 476 transitions. [2021-12-15 22:02:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:19,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-15 22:02:19,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:19,204 INFO L225 Difference]: With dead ends: 314 [2021-12-15 22:02:19,204 INFO L226 Difference]: Without dead ends: 169 [2021-12-15 22:02:19,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:19,205 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 11 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:19,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 493 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-15 22:02:19,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2021-12-15 22:02:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.503030303030303) internal successors, (248), 165 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 248 transitions. [2021-12-15 22:02:19,208 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 248 transitions. Word has length 54 [2021-12-15 22:02:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:19,208 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 248 transitions. [2021-12-15 22:02:19,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:19,208 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 248 transitions. [2021-12-15 22:02:19,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 22:02:19,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:19,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:19,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:02:19,209 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:19,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1297584632, now seen corresponding path program 1 times [2021-12-15 22:02:19,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:19,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646071758] [2021-12-15 22:02:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:19,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:19,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:19,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646071758] [2021-12-15 22:02:19,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646071758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:19,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:19,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:19,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9092815] [2021-12-15 22:02:19,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:19,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:19,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:19,276 INFO L87 Difference]: Start difference. First operand 166 states and 248 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:20,541 INFO L93 Difference]: Finished difference Result 429 states and 652 transitions. [2021-12-15 22:02:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:20,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-15 22:02:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:20,543 INFO L225 Difference]: With dead ends: 429 [2021-12-15 22:02:20,543 INFO L226 Difference]: Without dead ends: 284 [2021-12-15 22:02:20,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:20,543 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 132 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:20,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 332 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 22:02:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-15 22:02:20,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 194. [2021-12-15 22:02:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.5233160621761659) internal successors, (294), 193 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 294 transitions. [2021-12-15 22:02:20,549 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 294 transitions. Word has length 54 [2021-12-15 22:02:20,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:20,549 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 294 transitions. [2021-12-15 22:02:20,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:20,549 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 294 transitions. [2021-12-15 22:02:20,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 22:02:20,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:20,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:20,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:02:20,550 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:20,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:20,551 INFO L85 PathProgramCache]: Analyzing trace with hash -335911398, now seen corresponding path program 1 times [2021-12-15 22:02:20,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:20,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010640181] [2021-12-15 22:02:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:20,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:20,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:20,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010640181] [2021-12-15 22:02:20,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010640181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:20,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:20,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:20,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063191156] [2021-12-15 22:02:20,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:20,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:20,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:20,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:20,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:20,625 INFO L87 Difference]: Start difference. First operand 194 states and 294 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:22,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:22,813 INFO L93 Difference]: Finished difference Result 409 states and 624 transitions. [2021-12-15 22:02:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:22,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 22:02:22,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:22,814 INFO L225 Difference]: With dead ends: 409 [2021-12-15 22:02:22,814 INFO L226 Difference]: Without dead ends: 236 [2021-12-15 22:02:22,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:22,815 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 30 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:22,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 493 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 165 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:22,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-15 22:02:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 216. [2021-12-15 22:02:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5255813953488373) internal successors, (328), 215 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 328 transitions. [2021-12-15 22:02:22,820 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 328 transitions. Word has length 55 [2021-12-15 22:02:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:22,820 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 328 transitions. [2021-12-15 22:02:22,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 328 transitions. [2021-12-15 22:02:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 22:02:22,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:22,821 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 22:02:22,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:02:22,821 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1348956911, now seen corresponding path program 1 times [2021-12-15 22:02:22,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:22,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215070156] [2021-12-15 22:02:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:22,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:22,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:22,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215070156] [2021-12-15 22:02:22,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215070156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:22,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:22,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:22,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023818280] [2021-12-15 22:02:22,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:22,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:22,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:22,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:22,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:22,889 INFO L87 Difference]: Start difference. First operand 216 states and 328 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:24,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:24,839 INFO L93 Difference]: Finished difference Result 429 states and 655 transitions. [2021-12-15 22:02:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-15 22:02:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:24,840 INFO L225 Difference]: With dead ends: 429 [2021-12-15 22:02:24,841 INFO L226 Difference]: Without dead ends: 234 [2021-12-15 22:02:24,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:24,841 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 35 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:24,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 497 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 22:02:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-15 22:02:24,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 216. [2021-12-15 22:02:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5209302325581395) internal successors, (327), 215 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 327 transitions. [2021-12-15 22:02:24,846 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 327 transitions. Word has length 68 [2021-12-15 22:02:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:24,847 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 327 transitions. [2021-12-15 22:02:24,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 327 transitions. [2021-12-15 22:02:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 22:02:24,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:24,847 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-12-15 22:02:24,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:02:24,847 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash -913541186, now seen corresponding path program 1 times [2021-12-15 22:02:24,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:24,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132423360] [2021-12-15 22:02:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:24,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:24,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:24,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132423360] [2021-12-15 22:02:24,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132423360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:24,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:24,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:24,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098678551] [2021-12-15 22:02:24,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:24,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:24,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:24,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:24,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:24,967 INFO L87 Difference]: Start difference. First operand 216 states and 327 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:25,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:25,649 INFO L93 Difference]: Finished difference Result 428 states and 652 transitions. [2021-12-15 22:02:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:25,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-15 22:02:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:25,651 INFO L225 Difference]: With dead ends: 428 [2021-12-15 22:02:25,651 INFO L226 Difference]: Without dead ends: 233 [2021-12-15 22:02:25,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:25,652 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 39 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:25,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:02:25,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-15 22:02:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-12-15 22:02:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5162790697674418) internal successors, (326), 215 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 326 transitions. [2021-12-15 22:02:25,656 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 326 transitions. Word has length 69 [2021-12-15 22:02:25,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:25,656 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 326 transitions. [2021-12-15 22:02:25,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 326 transitions. [2021-12-15 22:02:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 22:02:25,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:25,657 INFO L514 BasicCegarLoop]: 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] [2021-12-15 22:02:25,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:02:25,657 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:25,658 INFO L85 PathProgramCache]: Analyzing trace with hash 149608874, now seen corresponding path program 1 times [2021-12-15 22:02:25,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:25,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626446885] [2021-12-15 22:02:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:25,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:25,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:25,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626446885] [2021-12-15 22:02:25,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626446885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:25,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:25,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:25,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448320191] [2021-12-15 22:02:25,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:25,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:25,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:25,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:25,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:25,734 INFO L87 Difference]: Start difference. First operand 216 states and 326 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:27,740 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:27,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:27,937 INFO L93 Difference]: Finished difference Result 428 states and 650 transitions. [2021-12-15 22:02:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:27,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-15 22:02:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:27,939 INFO L225 Difference]: With dead ends: 428 [2021-12-15 22:02:27,939 INFO L226 Difference]: Without dead ends: 233 [2021-12-15 22:02:27,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:27,939 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 37 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:27,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-15 22:02:27,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-12-15 22:02:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5116279069767442) internal successors, (325), 215 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 325 transitions. [2021-12-15 22:02:27,944 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 325 transitions. Word has length 69 [2021-12-15 22:02:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:27,944 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 325 transitions. [2021-12-15 22:02:27,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 325 transitions. [2021-12-15 22:02:27,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 22:02:27,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:27,944 INFO L514 BasicCegarLoop]: 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] [2021-12-15 22:02:27,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:02:27,945 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:27,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1277041085, now seen corresponding path program 1 times [2021-12-15 22:02:27,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:27,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781882437] [2021-12-15 22:02:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:27,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:28,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:28,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781882437] [2021-12-15 22:02:28,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781882437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:28,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:28,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:28,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086832220] [2021-12-15 22:02:28,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:28,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:28,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:28,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:28,037 INFO L87 Difference]: Start difference. First operand 216 states and 325 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:29,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:30,022 INFO L93 Difference]: Finished difference Result 418 states and 635 transitions. [2021-12-15 22:02:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:30,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-15 22:02:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:30,023 INFO L225 Difference]: With dead ends: 418 [2021-12-15 22:02:30,023 INFO L226 Difference]: Without dead ends: 223 [2021-12-15 22:02:30,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:30,024 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 26 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:30,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 513 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 22:02:30,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-15 22:02:30,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2021-12-15 22:02:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 215 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 324 transitions. [2021-12-15 22:02:30,039 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 324 transitions. Word has length 72 [2021-12-15 22:02:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:30,040 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 324 transitions. [2021-12-15 22:02:30,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 324 transitions. [2021-12-15 22:02:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 22:02:30,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:30,041 INFO L514 BasicCegarLoop]: 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] [2021-12-15 22:02:30,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:02:30,041 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:30,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:30,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2072837020, now seen corresponding path program 1 times [2021-12-15 22:02:30,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:30,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843644768] [2021-12-15 22:02:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:30,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:30,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:30,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843644768] [2021-12-15 22:02:30,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843644768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:30,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:30,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:30,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609121843] [2021-12-15 22:02:30,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:30,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:30,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:30,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:30,110 INFO L87 Difference]: Start difference. First operand 216 states and 324 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:32,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:32,377 INFO L93 Difference]: Finished difference Result 509 states and 769 transitions. [2021-12-15 22:02:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:32,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2021-12-15 22:02:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:32,378 INFO L225 Difference]: With dead ends: 509 [2021-12-15 22:02:32,378 INFO L226 Difference]: Without dead ends: 314 [2021-12-15 22:02:32,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:32,379 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 91 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:32,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 465 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-15 22:02:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 247. [2021-12-15 22:02:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.516260162601626) internal successors, (373), 246 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 373 transitions. [2021-12-15 22:02:32,384 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 373 transitions. Word has length 77 [2021-12-15 22:02:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:32,384 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 373 transitions. [2021-12-15 22:02:32,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:32,384 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 373 transitions. [2021-12-15 22:02:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 22:02:32,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:32,385 INFO L514 BasicCegarLoop]: 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] [2021-12-15 22:02:32,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:02:32,385 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:32,392 INFO L85 PathProgramCache]: Analyzing trace with hash -21853022, now seen corresponding path program 1 times [2021-12-15 22:02:32,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:32,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627427245] [2021-12-15 22:02:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:32,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:32,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:32,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627427245] [2021-12-15 22:02:32,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627427245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:32,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:32,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:32,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516140714] [2021-12-15 22:02:32,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:32,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:32,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:32,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:32,466 INFO L87 Difference]: Start difference. First operand 247 states and 373 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:34,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:34,760 INFO L93 Difference]: Finished difference Result 573 states and 875 transitions. [2021-12-15 22:02:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2021-12-15 22:02:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:34,762 INFO L225 Difference]: With dead ends: 573 [2021-12-15 22:02:34,762 INFO L226 Difference]: Without dead ends: 347 [2021-12-15 22:02:34,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:34,763 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 131 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:34,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 332 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:34,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-15 22:02:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 227. [2021-12-15 22:02:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5265486725663717) internal successors, (345), 226 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 345 transitions. [2021-12-15 22:02:34,767 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 345 transitions. Word has length 77 [2021-12-15 22:02:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:34,767 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 345 transitions. [2021-12-15 22:02:34,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 345 transitions. [2021-12-15 22:02:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 22:02:34,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:34,768 INFO L514 BasicCegarLoop]: 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] [2021-12-15 22:02:34,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:02:34,768 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:34,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:34,768 INFO L85 PathProgramCache]: Analyzing trace with hash 240748658, now seen corresponding path program 1 times [2021-12-15 22:02:34,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:34,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010417836] [2021-12-15 22:02:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:34,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:34,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010417836] [2021-12-15 22:02:34,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010417836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:34,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:34,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:34,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117094829] [2021-12-15 22:02:34,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:34,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:34,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:34,864 INFO L87 Difference]: Start difference. First operand 227 states and 345 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:36,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:37,176 INFO L93 Difference]: Finished difference Result 531 states and 810 transitions. [2021-12-15 22:02:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:37,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-15 22:02:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:37,178 INFO L225 Difference]: With dead ends: 531 [2021-12-15 22:02:37,178 INFO L226 Difference]: Without dead ends: 325 [2021-12-15 22:02:37,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:37,179 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 80 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:37,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 485 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-12-15 22:02:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2021-12-15 22:02:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.546816479400749) internal successors, (413), 267 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 413 transitions. [2021-12-15 22:02:37,184 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 413 transitions. Word has length 83 [2021-12-15 22:02:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:37,184 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 413 transitions. [2021-12-15 22:02:37,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 413 transitions. [2021-12-15 22:02:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 22:02:37,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:37,185 INFO L514 BasicCegarLoop]: 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] [2021-12-15 22:02:37,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 22:02:37,185 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:37,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1131058640, now seen corresponding path program 1 times [2021-12-15 22:02:37,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:37,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793978439] [2021-12-15 22:02:37,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:37,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:37,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793978439] [2021-12-15 22:02:37,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793978439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:37,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:37,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:37,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136363344] [2021-12-15 22:02:37,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:37,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:37,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:37,294 INFO L87 Difference]: Start difference. First operand 268 states and 413 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:39,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:39,595 INFO L93 Difference]: Finished difference Result 634 states and 981 transitions. [2021-12-15 22:02:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:39,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-15 22:02:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:39,596 INFO L225 Difference]: With dead ends: 634 [2021-12-15 22:02:39,596 INFO L226 Difference]: Without dead ends: 387 [2021-12-15 22:02:39,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:39,597 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 120 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:39,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 332 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:39,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-15 22:02:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 267. [2021-12-15 22:02:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.5488721804511278) internal successors, (412), 266 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 412 transitions. [2021-12-15 22:02:39,602 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 412 transitions. Word has length 83 [2021-12-15 22:02:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:39,602 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 412 transitions. [2021-12-15 22:02:39,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 412 transitions. [2021-12-15 22:02:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 22:02:39,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:39,603 INFO L514 BasicCegarLoop]: 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] [2021-12-15 22:02:39,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 22:02:39,604 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:39,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:39,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1344832479, now seen corresponding path program 1 times [2021-12-15 22:02:39,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:39,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132683194] [2021-12-15 22:02:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:39,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:39,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:39,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132683194] [2021-12-15 22:02:39,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132683194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:39,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:39,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:39,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118665855] [2021-12-15 22:02:39,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:39,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:39,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:39,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:39,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:39,678 INFO L87 Difference]: Start difference. First operand 267 states and 412 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:41,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:41,929 INFO L93 Difference]: Finished difference Result 603 states and 932 transitions. [2021-12-15 22:02:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:41,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-15 22:02:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:41,931 INFO L225 Difference]: With dead ends: 603 [2021-12-15 22:02:41,931 INFO L226 Difference]: Without dead ends: 357 [2021-12-15 22:02:41,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:41,932 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 69 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:41,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 469 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-12-15 22:02:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 309. [2021-12-15 22:02:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.5616883116883118) internal successors, (481), 308 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 481 transitions. [2021-12-15 22:02:41,937 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 481 transitions. Word has length 84 [2021-12-15 22:02:41,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:41,937 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 481 transitions. [2021-12-15 22:02:41,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:41,938 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 481 transitions. [2021-12-15 22:02:41,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 22:02:41,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:41,938 INFO L514 BasicCegarLoop]: 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] [2021-12-15 22:02:41,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 22:02:41,939 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:41,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:41,939 INFO L85 PathProgramCache]: Analyzing trace with hash -921185757, now seen corresponding path program 1 times [2021-12-15 22:02:41,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:41,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51561860] [2021-12-15 22:02:41,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:41,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:42,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:42,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51561860] [2021-12-15 22:02:42,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51561860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:42,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:42,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:42,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525324460] [2021-12-15 22:02:42,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:42,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:42,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:42,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:42,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:42,006 INFO L87 Difference]: Start difference. First operand 309 states and 481 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:44,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:44,243 INFO L93 Difference]: Finished difference Result 646 states and 1009 transitions. [2021-12-15 22:02:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:44,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-15 22:02:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:44,244 INFO L225 Difference]: With dead ends: 646 [2021-12-15 22:02:44,245 INFO L226 Difference]: Without dead ends: 358 [2021-12-15 22:02:44,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:44,246 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 38 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:44,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 595 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:44,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-15 22:02:44,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 333. [2021-12-15 22:02:44,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5632530120481927) internal successors, (519), 332 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 519 transitions. [2021-12-15 22:02:44,252 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 519 transitions. Word has length 84 [2021-12-15 22:02:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:44,252 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 519 transitions. [2021-12-15 22:02:44,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:44,252 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 519 transitions. [2021-12-15 22:02:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 22:02:44,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:44,253 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1] [2021-12-15 22:02:44,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 22:02:44,253 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:44,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:44,254 INFO L85 PathProgramCache]: Analyzing trace with hash 742972446, now seen corresponding path program 1 times [2021-12-15 22:02:44,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:44,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300687021] [2021-12-15 22:02:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:44,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:44,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:44,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300687021] [2021-12-15 22:02:44,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300687021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:44,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:44,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:44,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22656533] [2021-12-15 22:02:44,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:44,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:44,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:44,323 INFO L87 Difference]: Start difference. First operand 333 states and 519 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:44,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:44,839 INFO L93 Difference]: Finished difference Result 691 states and 1074 transitions. [2021-12-15 22:02:44,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:44,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-15 22:02:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:44,842 INFO L225 Difference]: With dead ends: 691 [2021-12-15 22:02:44,842 INFO L226 Difference]: Without dead ends: 379 [2021-12-15 22:02:44,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:44,843 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 92 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:44,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 471 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:02:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-15 22:02:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 333. [2021-12-15 22:02:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5602409638554218) internal successors, (518), 332 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 518 transitions. [2021-12-15 22:02:44,848 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 518 transitions. Word has length 97 [2021-12-15 22:02:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:44,848 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 518 transitions. [2021-12-15 22:02:44,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 518 transitions. [2021-12-15 22:02:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 22:02:44,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:44,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1] [2021-12-15 22:02:44,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 22:02:44,849 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:44,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1618991452, now seen corresponding path program 1 times [2021-12-15 22:02:44,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:44,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430803166] [2021-12-15 22:02:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:44,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:44,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:44,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430803166] [2021-12-15 22:02:44,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430803166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:44,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:44,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:44,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323123709] [2021-12-15 22:02:44,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:44,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:44,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:44,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:44,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:44,934 INFO L87 Difference]: Start difference. First operand 333 states and 518 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:46,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:47,138 INFO L93 Difference]: Finished difference Result 668 states and 1042 transitions. [2021-12-15 22:02:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:47,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-15 22:02:47,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:47,140 INFO L225 Difference]: With dead ends: 668 [2021-12-15 22:02:47,140 INFO L226 Difference]: Without dead ends: 356 [2021-12-15 22:02:47,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:47,141 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 45 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:47,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 595 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 175 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:47,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-15 22:02:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 333. [2021-12-15 22:02:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5572289156626506) internal successors, (517), 332 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 517 transitions. [2021-12-15 22:02:47,146 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 517 transitions. Word has length 97 [2021-12-15 22:02:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:47,146 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 517 transitions. [2021-12-15 22:02:47,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 517 transitions. [2021-12-15 22:02:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 22:02:47,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:47,150 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:47,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 22:02:47,151 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash 659456893, now seen corresponding path program 1 times [2021-12-15 22:02:47,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:47,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484852736] [2021-12-15 22:02:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:47,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:47,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:47,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484852736] [2021-12-15 22:02:47,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484852736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:47,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:47,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:47,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310901054] [2021-12-15 22:02:47,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:47,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:47,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:47,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:47,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:47,248 INFO L87 Difference]: Start difference. First operand 333 states and 517 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:49,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:49,568 INFO L93 Difference]: Finished difference Result 733 states and 1140 transitions. [2021-12-15 22:02:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-15 22:02:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:49,570 INFO L225 Difference]: With dead ends: 733 [2021-12-15 22:02:49,570 INFO L226 Difference]: Without dead ends: 421 [2021-12-15 22:02:49,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:49,571 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 148 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:49,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 336 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-12-15 22:02:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 333. [2021-12-15 22:02:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5421686746987953) internal successors, (512), 332 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 512 transitions. [2021-12-15 22:02:49,576 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 512 transitions. Word has length 98 [2021-12-15 22:02:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:49,577 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 512 transitions. [2021-12-15 22:02:49,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 512 transitions. [2021-12-15 22:02:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 22:02:49,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:49,578 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:49,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 22:02:49,578 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:49,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1748606959, now seen corresponding path program 1 times [2021-12-15 22:02:49,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:49,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715134558] [2021-12-15 22:02:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:49,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 22:02:49,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:49,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715134558] [2021-12-15 22:02:49,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715134558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:49,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:49,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 22:02:49,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773063658] [2021-12-15 22:02:49,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:49,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 22:02:49,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:49,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 22:02:49,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:49,679 INFO L87 Difference]: Start difference. First operand 333 states and 512 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:51,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:53,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:54,000 INFO L93 Difference]: Finished difference Result 655 states and 1012 transitions. [2021-12-15 22:02:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 22:02:54,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-15 22:02:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:54,002 INFO L225 Difference]: With dead ends: 655 [2021-12-15 22:02:54,002 INFO L226 Difference]: Without dead ends: 343 [2021-12-15 22:02:54,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:02:54,003 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 152 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:54,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 354 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 310 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:02:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-15 22:02:54,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 342. [2021-12-15 22:02:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.533724340175953) internal successors, (523), 341 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 523 transitions. [2021-12-15 22:02:54,009 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 523 transitions. Word has length 98 [2021-12-15 22:02:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:54,010 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 523 transitions. [2021-12-15 22:02:54,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:54,010 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 523 transitions. [2021-12-15 22:02:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-15 22:02:54,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:54,011 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:54,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 22:02:54,011 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:54,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:54,012 INFO L85 PathProgramCache]: Analyzing trace with hash 975621690, now seen corresponding path program 1 times [2021-12-15 22:02:54,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:54,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090296117] [2021-12-15 22:02:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:54,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:54,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:54,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090296117] [2021-12-15 22:02:54,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090296117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:54,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:54,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:54,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451763517] [2021-12-15 22:02:54,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:54,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:54,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:54,099 INFO L87 Difference]: Start difference. First operand 342 states and 523 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:56,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:56,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:56,399 INFO L93 Difference]: Finished difference Result 751 states and 1151 transitions. [2021-12-15 22:02:56,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:56,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-15 22:02:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:56,401 INFO L225 Difference]: With dead ends: 751 [2021-12-15 22:02:56,401 INFO L226 Difference]: Without dead ends: 430 [2021-12-15 22:02:56,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:56,402 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 146 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:56,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 338 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-12-15 22:02:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 342. [2021-12-15 22:02:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5190615835777126) internal successors, (518), 341 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 518 transitions. [2021-12-15 22:02:56,408 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 518 transitions. Word has length 99 [2021-12-15 22:02:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:56,408 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 518 transitions. [2021-12-15 22:02:56,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 518 transitions. [2021-12-15 22:02:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-15 22:02:56,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:56,409 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:56,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 22:02:56,410 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:56,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1534783487, now seen corresponding path program 1 times [2021-12-15 22:02:56,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:56,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832334726] [2021-12-15 22:02:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:56,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:56,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:56,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832334726] [2021-12-15 22:02:56,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832334726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:56,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:56,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:56,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762769090] [2021-12-15 22:02:56,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:56,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:56,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:56,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:56,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:56,482 INFO L87 Difference]: Start difference. First operand 342 states and 518 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) [2021-12-15 22:02:58,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:58,723 INFO L93 Difference]: Finished difference Result 698 states and 1058 transitions. [2021-12-15 22:02:58,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:58,724 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 102 [2021-12-15 22:02:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:58,725 INFO L225 Difference]: With dead ends: 698 [2021-12-15 22:02:58,725 INFO L226 Difference]: Without dead ends: 377 [2021-12-15 22:02:58,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:58,726 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 83 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:58,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 487 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:58,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-15 22:02:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 342. [2021-12-15 22:02:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5161290322580645) internal successors, (517), 341 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 517 transitions. [2021-12-15 22:02:58,732 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 517 transitions. Word has length 102 [2021-12-15 22:02:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:58,732 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 517 transitions. [2021-12-15 22:02:58,733 INFO L471 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) [2021-12-15 22:02:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 517 transitions. [2021-12-15 22:02:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-15 22:02:58,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:58,733 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:58,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-15 22:02:58,734 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:58,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2095483265, now seen corresponding path program 1 times [2021-12-15 22:02:58,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:58,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546655386] [2021-12-15 22:02:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:58,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:58,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:58,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546655386] [2021-12-15 22:02:58,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546655386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:58,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:58,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:58,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731885254] [2021-12-15 22:02:58,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:58,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:58,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:58,803 INFO L87 Difference]: Start difference. First operand 342 states and 517 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) [2021-12-15 22:03:00,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:03:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:00,980 INFO L93 Difference]: Finished difference Result 675 states and 1026 transitions. [2021-12-15 22:03:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:00,980 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 102 [2021-12-15 22:03:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:00,981 INFO L225 Difference]: With dead ends: 675 [2021-12-15 22:03:00,981 INFO L226 Difference]: Without dead ends: 354 [2021-12-15 22:03:00,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:03:00,982 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 36 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:00,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 577 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:03:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-15 22:03:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 342. [2021-12-15 22:03:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5131964809384164) internal successors, (516), 341 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 516 transitions. [2021-12-15 22:03:00,988 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 516 transitions. Word has length 102 [2021-12-15 22:03:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:00,988 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 516 transitions. [2021-12-15 22:03:00,988 INFO L471 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) [2021-12-15 22:03:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 516 transitions. [2021-12-15 22:03:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-15 22:03:00,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:00,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:00,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-15 22:03:00,989 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:00,990 INFO L85 PathProgramCache]: Analyzing trace with hash 280390343, now seen corresponding path program 1 times [2021-12-15 22:03:00,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:00,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646122607] [2021-12-15 22:03:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:00,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:01,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:01,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646122607] [2021-12-15 22:03:01,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646122607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:01,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:01,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:01,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523436255] [2021-12-15 22:03:01,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:01,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:01,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:01,086 INFO L87 Difference]: Start difference. First operand 342 states and 516 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:03,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:03:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:03,382 INFO L93 Difference]: Finished difference Result 790 states and 1201 transitions. [2021-12-15 22:03:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:03,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-15 22:03:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:03,384 INFO L225 Difference]: With dead ends: 790 [2021-12-15 22:03:03,384 INFO L226 Difference]: Without dead ends: 469 [2021-12-15 22:03:03,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:03:03,385 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 131 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:03,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 392 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:03,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-15 22:03:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 368. [2021-12-15 22:03:03,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.5068119891008174) internal successors, (553), 367 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 553 transitions. [2021-12-15 22:03:03,391 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 553 transitions. Word has length 104 [2021-12-15 22:03:03,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:03,391 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 553 transitions. [2021-12-15 22:03:03,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 553 transitions. [2021-12-15 22:03:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-15 22:03:03,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:03,392 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:03,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-15 22:03:03,393 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:03,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:03,393 INFO L85 PathProgramCache]: Analyzing trace with hash 509759261, now seen corresponding path program 1 times [2021-12-15 22:03:03,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:03,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17670023] [2021-12-15 22:03:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:03,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:03,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:03,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17670023] [2021-12-15 22:03:03,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17670023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:03,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:03,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:03,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585342401] [2021-12-15 22:03:03,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:03,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:03,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:03,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:03,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:03,485 INFO L87 Difference]: Start difference. First operand 368 states and 553 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:04,235 INFO L93 Difference]: Finished difference Result 748 states and 1125 transitions. [2021-12-15 22:03:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-15 22:03:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:04,237 INFO L225 Difference]: With dead ends: 748 [2021-12-15 22:03:04,237 INFO L226 Difference]: Without dead ends: 401 [2021-12-15 22:03:04,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:03:04,238 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 68 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:04,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 495 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:03:04,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-12-15 22:03:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 368. [2021-12-15 22:03:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.5040871934604905) internal successors, (552), 367 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 552 transitions. [2021-12-15 22:03:04,245 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 552 transitions. Word has length 105 [2021-12-15 22:03:04,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:04,245 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 552 transitions. [2021-12-15 22:03:04,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 552 transitions. [2021-12-15 22:03:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-15 22:03:04,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:04,246 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:04,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-15 22:03:04,247 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash -213108826, now seen corresponding path program 1 times [2021-12-15 22:03:04,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:04,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972848617] [2021-12-15 22:03:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:04,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:04,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:04,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972848617] [2021-12-15 22:03:04,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972848617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:04,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:04,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:04,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572671955] [2021-12-15 22:03:04,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:04,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:04,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:04,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:04,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:04,317 INFO L87 Difference]: Start difference. First operand 368 states and 552 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:06,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:03:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:06,593 INFO L93 Difference]: Finished difference Result 868 states and 1312 transitions. [2021-12-15 22:03:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:06,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-15 22:03:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:06,595 INFO L225 Difference]: With dead ends: 868 [2021-12-15 22:03:06,595 INFO L226 Difference]: Without dead ends: 521 [2021-12-15 22:03:06,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:03:06,596 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 124 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:06,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 348 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-15 22:03:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 432. [2021-12-15 22:03:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.505800464037123) internal successors, (649), 431 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 649 transitions. [2021-12-15 22:03:06,603 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 649 transitions. Word has length 105 [2021-12-15 22:03:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:06,603 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 649 transitions. [2021-12-15 22:03:06,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 649 transitions. [2021-12-15 22:03:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 22:03:06,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:06,604 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:06,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-15 22:03:06,605 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1295545029, now seen corresponding path program 1 times [2021-12-15 22:03:06,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:06,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227296767] [2021-12-15 22:03:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:06,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:06,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:06,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227296767] [2021-12-15 22:03:06,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227296767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:06,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:06,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:06,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988964610] [2021-12-15 22:03:06,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:06,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:06,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:06,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:06,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:06,671 INFO L87 Difference]: Start difference. First operand 432 states and 649 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:08,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:03:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:08,970 INFO L93 Difference]: Finished difference Result 931 states and 1403 transitions. [2021-12-15 22:03:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-15 22:03:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:08,972 INFO L225 Difference]: With dead ends: 931 [2021-12-15 22:03:08,972 INFO L226 Difference]: Without dead ends: 520 [2021-12-15 22:03:08,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:03:08,973 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 133 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:08,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 350 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:08,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-15 22:03:08,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 432. [2021-12-15 22:03:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.4895591647331787) internal successors, (642), 431 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 642 transitions. [2021-12-15 22:03:08,987 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 642 transitions. Word has length 106 [2021-12-15 22:03:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:08,987 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 642 transitions. [2021-12-15 22:03:08,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 642 transitions. [2021-12-15 22:03:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 22:03:08,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:08,988 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:08,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-15 22:03:08,989 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:08,989 INFO L85 PathProgramCache]: Analyzing trace with hash 878148423, now seen corresponding path program 1 times [2021-12-15 22:03:08,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:08,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345227227] [2021-12-15 22:03:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:08,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 22:03:09,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:09,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345227227] [2021-12-15 22:03:09,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345227227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:09,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:09,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:03:09,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080020333] [2021-12-15 22:03:09,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:09,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:03:09,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:03:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,055 INFO L87 Difference]: Start difference. First operand 432 states and 642 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:09,091 INFO L93 Difference]: Finished difference Result 1249 states and 1872 transitions. [2021-12-15 22:03:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:03:09,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-15 22:03:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:09,093 INFO L225 Difference]: With dead ends: 1249 [2021-12-15 22:03:09,093 INFO L226 Difference]: Without dead ends: 838 [2021-12-15 22:03:09,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,094 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 136 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:09,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 428 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 22:03:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-12-15 22:03:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 838. [2021-12-15 22:03:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 1.4874551971326164) internal successors, (1245), 837 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1245 transitions. [2021-12-15 22:03:09,108 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1245 transitions. Word has length 106 [2021-12-15 22:03:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:09,108 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1245 transitions. [2021-12-15 22:03:09,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,108 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1245 transitions. [2021-12-15 22:03:09,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 22:03:09,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:09,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:09,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-15 22:03:09,110 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:09,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:09,110 INFO L85 PathProgramCache]: Analyzing trace with hash -808031415, now seen corresponding path program 1 times [2021-12-15 22:03:09,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:09,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616017669] [2021-12-15 22:03:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:09,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-15 22:03:09,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:09,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616017669] [2021-12-15 22:03:09,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616017669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:09,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:09,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:03:09,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526751148] [2021-12-15 22:03:09,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:09,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:03:09,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:09,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:03:09,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,176 INFO L87 Difference]: Start difference. First operand 838 states and 1245 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:09,204 INFO L93 Difference]: Finished difference Result 1682 states and 2502 transitions. [2021-12-15 22:03:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:03:09,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-15 22:03:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:09,207 INFO L225 Difference]: With dead ends: 1682 [2021-12-15 22:03:09,207 INFO L226 Difference]: Without dead ends: 865 [2021-12-15 22:03:09,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,209 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:09,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 410 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 22:03:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-12-15 22:03:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 865. [2021-12-15 22:03:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 1.4814814814814814) internal successors, (1280), 864 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1280 transitions. [2021-12-15 22:03:09,222 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1280 transitions. Word has length 106 [2021-12-15 22:03:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:09,223 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 1280 transitions. [2021-12-15 22:03:09,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1280 transitions. [2021-12-15 22:03:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 22:03:09,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:09,224 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:09,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-15 22:03:09,224 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1068451403, now seen corresponding path program 1 times [2021-12-15 22:03:09,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:09,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545044134] [2021-12-15 22:03:09,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:09,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-15 22:03:09,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:09,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545044134] [2021-12-15 22:03:09,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545044134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:09,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:09,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:03:09,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924389879] [2021-12-15 22:03:09,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:09,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:03:09,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:09,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:03:09,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,281 INFO L87 Difference]: Start difference. First operand 865 states and 1280 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:09,305 INFO L93 Difference]: Finished difference Result 1711 states and 2538 transitions. [2021-12-15 22:03:09,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:03:09,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-15 22:03:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:09,307 INFO L225 Difference]: With dead ends: 1711 [2021-12-15 22:03:09,307 INFO L226 Difference]: Without dead ends: 867 [2021-12-15 22:03:09,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,308 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:09,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 22:03:09,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-12-15 22:03:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 867. [2021-12-15 22:03:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 1.4803695150115475) internal successors, (1282), 866 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1282 transitions. [2021-12-15 22:03:09,329 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1282 transitions. Word has length 106 [2021-12-15 22:03:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:09,329 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 1282 transitions. [2021-12-15 22:03:09,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1282 transitions. [2021-12-15 22:03:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 22:03:09,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:09,331 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:09,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-15 22:03:09,331 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:09,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:09,331 INFO L85 PathProgramCache]: Analyzing trace with hash -414944271, now seen corresponding path program 1 times [2021-12-15 22:03:09,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:09,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665342279] [2021-12-15 22:03:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:09,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-15 22:03:09,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:09,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665342279] [2021-12-15 22:03:09,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665342279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:09,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:09,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:03:09,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714744227] [2021-12-15 22:03:09,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:09,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:03:09,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:09,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:03:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,398 INFO L87 Difference]: Start difference. First operand 867 states and 1282 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:09,442 INFO L93 Difference]: Finished difference Result 2122 states and 3154 transitions. [2021-12-15 22:03:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:03:09,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 22:03:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:09,446 INFO L225 Difference]: With dead ends: 2122 [2021-12-15 22:03:09,446 INFO L226 Difference]: Without dead ends: 1278 [2021-12-15 22:03:09,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,448 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:09,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 569 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 22:03:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-12-15 22:03:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1276. [2021-12-15 22:03:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 1.4831372549019608) internal successors, (1891), 1275 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1891 transitions. [2021-12-15 22:03:09,476 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1891 transitions. Word has length 108 [2021-12-15 22:03:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:09,477 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 1891 transitions. [2021-12-15 22:03:09,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1891 transitions. [2021-12-15 22:03:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-15 22:03:09,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:09,478 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:09,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-15 22:03:09,479 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:09,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2063160218, now seen corresponding path program 1 times [2021-12-15 22:03:09,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:09,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775636578] [2021-12-15 22:03:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:09,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-15 22:03:09,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:09,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775636578] [2021-12-15 22:03:09,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775636578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:09,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:09,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:03:09,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845393183] [2021-12-15 22:03:09,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:09,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:03:09,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:09,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:03:09,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,550 INFO L87 Difference]: Start difference. First operand 1276 states and 1891 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:09,597 INFO L93 Difference]: Finished difference Result 2905 states and 4323 transitions. [2021-12-15 22:03:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:03:09,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-15 22:03:09,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:09,601 INFO L225 Difference]: With dead ends: 2905 [2021-12-15 22:03:09,601 INFO L226 Difference]: Without dead ends: 1652 [2021-12-15 22:03:09,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,603 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 141 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:09,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 567 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 22:03:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-12-15 22:03:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1652. [2021-12-15 22:03:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 1.483343428225318) internal successors, (2449), 1651 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2449 transitions. [2021-12-15 22:03:09,639 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2449 transitions. Word has length 125 [2021-12-15 22:03:09,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:09,639 INFO L470 AbstractCegarLoop]: Abstraction has 1652 states and 2449 transitions. [2021-12-15 22:03:09,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2449 transitions. [2021-12-15 22:03:09,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-15 22:03:09,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:09,643 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:09,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-15 22:03:09,643 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:09,644 INFO L85 PathProgramCache]: Analyzing trace with hash 726227607, now seen corresponding path program 1 times [2021-12-15 22:03:09,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:09,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669394507] [2021-12-15 22:03:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:09,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-15 22:03:09,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:09,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669394507] [2021-12-15 22:03:09,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669394507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:09,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:09,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:03:09,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938040135] [2021-12-15 22:03:09,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:09,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:03:09,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:09,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:03:09,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,739 INFO L87 Difference]: Start difference. First operand 1652 states and 2449 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:09,796 INFO L93 Difference]: Finished difference Result 2474 states and 3669 transitions. [2021-12-15 22:03:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:03:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-15 22:03:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:09,801 INFO L225 Difference]: With dead ends: 2474 [2021-12-15 22:03:09,801 INFO L226 Difference]: Without dead ends: 2063 [2021-12-15 22:03:09,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,804 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:09,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 373 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 22:03:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-12-15 22:03:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2061. [2021-12-15 22:03:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 1.4825242718446603) internal successors, (3054), 2060 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3054 transitions. [2021-12-15 22:03:09,834 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3054 transitions. Word has length 128 [2021-12-15 22:03:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:09,835 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 3054 transitions. [2021-12-15 22:03:09,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3054 transitions. [2021-12-15 22:03:09,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-15 22:03:09,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:09,837 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:09,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-15 22:03:09,837 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:09,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:09,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1329906676, now seen corresponding path program 1 times [2021-12-15 22:03:09,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:09,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831075579] [2021-12-15 22:03:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:09,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-15 22:03:09,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:09,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831075579] [2021-12-15 22:03:09,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831075579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:09,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:09,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:03:09,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255319046] [2021-12-15 22:03:09,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:09,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:03:09,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:09,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:03:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:09,964 INFO L87 Difference]: Start difference. First operand 2061 states and 3054 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:10,007 INFO L93 Difference]: Finished difference Result 2474 states and 3665 transitions. [2021-12-15 22:03:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:03:10,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-15 22:03:10,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:10,014 INFO L225 Difference]: With dead ends: 2474 [2021-12-15 22:03:10,014 INFO L226 Difference]: Without dead ends: 2472 [2021-12-15 22:03:10,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:10,019 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:10,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 371 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 22:03:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-12-15 22:03:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2470. [2021-12-15 22:03:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 1.4831915755366545) internal successors, (3662), 2469 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 3662 transitions. [2021-12-15 22:03:10,063 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 3662 transitions. Word has length 129 [2021-12-15 22:03:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:10,063 INFO L470 AbstractCegarLoop]: Abstraction has 2470 states and 3662 transitions. [2021-12-15 22:03:10,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 3662 transitions. [2021-12-15 22:03:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-15 22:03:10,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:10,087 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:10,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-15 22:03:10,088 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:10,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:10,090 INFO L85 PathProgramCache]: Analyzing trace with hash -657412248, now seen corresponding path program 1 times [2021-12-15 22:03:10,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:10,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046241827] [2021-12-15 22:03:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:10,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-15 22:03:10,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:10,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046241827] [2021-12-15 22:03:10,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046241827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:10,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:10,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:03:10,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645343525] [2021-12-15 22:03:10,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:10,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:03:10,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:10,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:03:10,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:10,171 INFO L87 Difference]: Start difference. First operand 2470 states and 3662 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:10,238 INFO L93 Difference]: Finished difference Result 5320 states and 7903 transitions. [2021-12-15 22:03:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:03:10,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-12-15 22:03:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:10,245 INFO L225 Difference]: With dead ends: 5320 [2021-12-15 22:03:10,245 INFO L226 Difference]: Without dead ends: 2873 [2021-12-15 22:03:10,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:03:10,249 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 140 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:10,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 569 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 22:03:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-12-15 22:03:10,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2873. [2021-12-15 22:03:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2873 states, 2872 states have (on average 1.4836350974930361) internal successors, (4261), 2872 states have internal predecessors, (4261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 4261 transitions. [2021-12-15 22:03:10,292 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 4261 transitions. Word has length 167 [2021-12-15 22:03:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:10,292 INFO L470 AbstractCegarLoop]: Abstraction has 2873 states and 4261 transitions. [2021-12-15 22:03:10,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 4261 transitions. [2021-12-15 22:03:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-15 22:03:10,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:10,296 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:10,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-15 22:03:10,296 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1124089119, now seen corresponding path program 1 times [2021-12-15 22:03:10,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:10,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784472856] [2021-12-15 22:03:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:10,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-15 22:03:10,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:10,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784472856] [2021-12-15 22:03:10,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784472856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:10,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:10,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:10,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352207001] [2021-12-15 22:03:10,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:10,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:10,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:10,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:10,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:10,401 INFO L87 Difference]: Start difference. First operand 2873 states and 4261 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)