./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers-simplified/floppy_simpl4.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/ntdrivers-simplified/floppy_simpl4.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 b15a3429ae983cb571408e453cffd56861eca4f5fc7e760aad97ad24a44474ad --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 02:49:43,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 02:49:43,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 02:49:43,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 02:49:43,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 02:49:43,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 02:49:43,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 02:49:43,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 02:49:43,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 02:49:43,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 02:49:43,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 02:49:43,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 02:49:43,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 02:49:43,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 02:49:43,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 02:49:43,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 02:49:43,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 02:49:43,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 02:49:43,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 02:49:43,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 02:49:43,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 02:49:43,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 02:49:43,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 02:49:43,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 02:49:43,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 02:49:43,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 02:49:43,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 02:49:43,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 02:49:43,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 02:49:43,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 02:49:43,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 02:49:43,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 02:49:43,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 02:49:43,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 02:49:43,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 02:49:43,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 02:49:43,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 02:49:43,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 02:49:43,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 02:49:43,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 02:49:43,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 02:49:43,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 02:49:43,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 02:49:43,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 02:49:43,577 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 02:49:43,577 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 02:49:43,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 02:49:43,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 02:49:43,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 02:49:43,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 02:49:43,579 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 02:49:43,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 02:49:43,580 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 02:49:43,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 02:49:43,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 02:49:43,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 02:49:43,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 02:49:43,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 02:49:43,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 02:49:43,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 02:49:43,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 02:49:43,582 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 02:49:43,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 02:49:43,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 02:49:43,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 02:49:43,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 02:49:43,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:49:43,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 02:49:43,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 02:49:43,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 02:49:43,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 02:49:43,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 02:49:43,585 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 02:49:43,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 02:49:43,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 02:49:43,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 02:49:43,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b15a3429ae983cb571408e453cffd56861eca4f5fc7e760aad97ad24a44474ad [2021-12-17 02:49:43,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 02:49:43,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 02:49:43,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 02:49:43,855 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 02:49:43,856 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 02:49:43,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers-simplified/floppy_simpl4.cil-2.c [2021-12-17 02:49:43,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b0a46d3/9aa58f1966af4e28b56ebde482087bfb/FLAG46c0a156f [2021-12-17 02:49:44,297 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 02:49:44,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/floppy_simpl4.cil-2.c [2021-12-17 02:49:44,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b0a46d3/9aa58f1966af4e28b56ebde482087bfb/FLAG46c0a156f [2021-12-17 02:49:44,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b0a46d3/9aa58f1966af4e28b56ebde482087bfb [2021-12-17 02:49:44,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 02:49:44,326 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 02:49:44,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 02:49:44,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 02:49:44,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 02:49:44,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25bd8ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44, skipping insertion in model container [2021-12-17 02:49:44,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 02:49:44,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 02:49:44,675 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/ntdrivers-simplified/floppy_simpl4.cil-2.c[48585,48598] [2021-12-17 02:49:44,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:49:44,685 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 02:49:44,778 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/ntdrivers-simplified/floppy_simpl4.cil-2.c[48585,48598] [2021-12-17 02:49:44,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:49:44,794 INFO L208 MainTranslator]: Completed translation [2021-12-17 02:49:44,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44 WrapperNode [2021-12-17 02:49:44,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 02:49:44,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 02:49:44,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 02:49:44,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 02:49:44,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,871 INFO L137 Inliner]: procedures = 41, calls = 76, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 1331 [2021-12-17 02:49:44,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 02:49:44,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 02:49:44,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 02:49:44,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 02:49:44,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 02:49:44,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 02:49:44,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 02:49:44,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 02:49:44,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44" (1/1) ... [2021-12-17 02:49:44,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:49:44,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:49:44,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 02:49:45,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 02:49:45,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 02:49:45,028 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2021-12-17 02:49:45,028 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2021-12-17 02:49:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2021-12-17 02:49:45,029 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2021-12-17 02:49:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-17 02:49:45,029 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-17 02:49:45,030 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-17 02:49:45,031 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-17 02:49:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-17 02:49:45,031 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-17 02:49:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 02:49:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-17 02:49:45,031 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-17 02:49:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2021-12-17 02:49:45,032 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2021-12-17 02:49:45,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 02:49:45,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 02:49:45,253 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 02:49:45,254 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 02:49:45,258 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,320 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-17 02:49:45,320 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-17 02:49:45,321 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,328 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-17 02:49:45,328 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-17 02:49:45,337 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,345 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,351 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,353 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,356 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,357 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,361 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,766 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##170: assume !false; [2021-12-17 02:49:45,767 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##180: assume false; [2021-12-17 02:49:45,767 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##181: assume !false; [2021-12-17 02:49:45,767 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##67: assume !false; [2021-12-17 02:49:45,767 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##66: assume false; [2021-12-17 02:49:45,767 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##127: assume !false; [2021-12-17 02:49:45,767 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2021-12-17 02:49:45,768 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2021-12-17 02:49:45,768 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2021-12-17 02:49:45,768 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2021-12-17 02:49:45,768 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##169: assume false; [2021-12-17 02:49:45,768 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##236: assume !false; [2021-12-17 02:49:45,768 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##235: assume false; [2021-12-17 02:49:45,768 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##126: assume false; [2021-12-17 02:49:45,770 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,797 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-17 02:49:45,798 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-17 02:49:45,801 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,804 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,804 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:49:45,846 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2021-12-17 02:49:45,847 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2021-12-17 02:49:45,847 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2021-12-17 02:49:45,847 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2021-12-17 02:49:45,848 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2021-12-17 02:49:45,848 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2021-12-17 02:49:45,872 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 02:49:45,885 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 02:49:45,885 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 02:49:45,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:49:45 BoogieIcfgContainer [2021-12-17 02:49:45,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 02:49:45,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 02:49:45,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 02:49:45,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 02:49:45,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:49:44" (1/3) ... [2021-12-17 02:49:45,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8b71ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:49:45, skipping insertion in model container [2021-12-17 02:49:45,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:49:44" (2/3) ... [2021-12-17 02:49:45,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8b71ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:49:45, skipping insertion in model container [2021-12-17 02:49:45,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:49:45" (3/3) ... [2021-12-17 02:49:45,910 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-2.c [2021-12-17 02:49:45,914 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 02:49:45,914 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 02:49:45,968 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 02:49:45,976 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 02:49:45,976 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 02:49:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 318 states, 259 states have (on average 1.5212355212355213) internal successors, (394), 284 states have internal predecessors, (394), 50 states have call successors, (50), 7 states have call predecessors, (50), 7 states have return successors, (50), 45 states have call predecessors, (50), 50 states have call successors, (50) [2021-12-17 02:49:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 02:49:46,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:46,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:46,019 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:46,024 INFO L85 PathProgramCache]: Analyzing trace with hash -581881369, now seen corresponding path program 1 times [2021-12-17 02:49:46,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:46,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853376916] [2021-12-17 02:49:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:46,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:46,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:46,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853376916] [2021-12-17 02:49:46,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853376916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:46,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:46,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:49:46,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047901019] [2021-12-17 02:49:46,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:46,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:49:46,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:46,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:49:46,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:46,280 INFO L87 Difference]: Start difference. First operand has 318 states, 259 states have (on average 1.5212355212355213) internal successors, (394), 284 states have internal predecessors, (394), 50 states have call successors, (50), 7 states have call predecessors, (50), 7 states have return successors, (50), 45 states have call predecessors, (50), 50 states have call successors, (50) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:46,400 INFO L93 Difference]: Finished difference Result 511 states and 794 transitions. [2021-12-17 02:49:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:49:46,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 02:49:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:46,425 INFO L225 Difference]: With dead ends: 511 [2021-12-17 02:49:46,426 INFO L226 Difference]: Without dead ends: 310 [2021-12-17 02:49:46,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:46,437 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 261 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:46,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 629 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:49:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-12-17 02:49:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2021-12-17 02:49:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 253 states have (on average 1.4782608695652173) internal successors, (374), 276 states have internal predecessors, (374), 50 states have call successors, (50), 7 states have call predecessors, (50), 6 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-17 02:49:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 453 transitions. [2021-12-17 02:49:46,526 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 453 transitions. Word has length 13 [2021-12-17 02:49:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:46,527 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 453 transitions. [2021-12-17 02:49:46,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 453 transitions. [2021-12-17 02:49:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 02:49:46,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:46,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:46,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 02:49:46,535 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1536856865, now seen corresponding path program 1 times [2021-12-17 02:49:46,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:46,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408669745] [2021-12-17 02:49:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:46,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:46,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:46,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408669745] [2021-12-17 02:49:46,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408669745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:46,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:46,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:49:46,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126203924] [2021-12-17 02:49:46,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:46,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:49:46,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:46,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:49:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:46,634 INFO L87 Difference]: Start difference. First operand 310 states and 453 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:46,785 INFO L93 Difference]: Finished difference Result 558 states and 805 transitions. [2021-12-17 02:49:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:49:46,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-17 02:49:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:46,816 INFO L225 Difference]: With dead ends: 558 [2021-12-17 02:49:46,817 INFO L226 Difference]: Without dead ends: 428 [2021-12-17 02:49:46,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:46,819 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 359 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:46,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 752 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:49:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-12-17 02:49:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 411. [2021-12-17 02:49:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 353 states have (on average 1.4022662889518414) internal successors, (495), 356 states have internal predecessors, (495), 48 states have call successors, (48), 11 states have call predecessors, (48), 9 states have return successors, (52), 44 states have call predecessors, (52), 37 states have call successors, (52) [2021-12-17 02:49:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 595 transitions. [2021-12-17 02:49:46,855 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 595 transitions. Word has length 16 [2021-12-17 02:49:46,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:46,855 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 595 transitions. [2021-12-17 02:49:46,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:46,855 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 595 transitions. [2021-12-17 02:49:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 02:49:46,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:46,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:46,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 02:49:46,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:46,858 INFO L85 PathProgramCache]: Analyzing trace with hash -866854987, now seen corresponding path program 1 times [2021-12-17 02:49:46,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:46,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314107501] [2021-12-17 02:49:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:46,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:46,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:46,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314107501] [2021-12-17 02:49:46,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314107501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:46,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:46,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:49:46,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064364508] [2021-12-17 02:49:46,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:46,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:49:46,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:46,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:49:46,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:46,914 INFO L87 Difference]: Start difference. First operand 411 states and 595 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:46,947 INFO L93 Difference]: Finished difference Result 516 states and 730 transitions. [2021-12-17 02:49:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:49:46,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-17 02:49:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:46,952 INFO L225 Difference]: With dead ends: 516 [2021-12-17 02:49:46,952 INFO L226 Difference]: Without dead ends: 497 [2021-12-17 02:49:46,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:46,958 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 407 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:46,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 540 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:49:46,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-12-17 02:49:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 459. [2021-12-17 02:49:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 394 states have (on average 1.3959390862944163) internal successors, (550), 404 states have internal predecessors, (550), 50 states have call successors, (50), 14 states have call predecessors, (50), 14 states have return successors, (59), 43 states have call predecessors, (59), 41 states have call successors, (59) [2021-12-17 02:49:46,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 659 transitions. [2021-12-17 02:49:46,983 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 659 transitions. Word has length 19 [2021-12-17 02:49:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:46,984 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 659 transitions. [2021-12-17 02:49:46,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 659 transitions. [2021-12-17 02:49:46,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 02:49:46,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:46,990 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] [2021-12-17 02:49:46,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 02:49:46,991 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:46,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:46,992 INFO L85 PathProgramCache]: Analyzing trace with hash 122564178, now seen corresponding path program 1 times [2021-12-17 02:49:46,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:46,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310499097] [2021-12-17 02:49:46,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:46,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:47,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:47,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310499097] [2021-12-17 02:49:47,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310499097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:47,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:47,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:49:47,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867494056] [2021-12-17 02:49:47,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:47,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:49:47,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:49:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:47,066 INFO L87 Difference]: Start difference. First operand 459 states and 659 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:47,104 INFO L93 Difference]: Finished difference Result 861 states and 1224 transitions. [2021-12-17 02:49:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:49:47,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-17 02:49:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:47,109 INFO L225 Difference]: With dead ends: 861 [2021-12-17 02:49:47,109 INFO L226 Difference]: Without dead ends: 638 [2021-12-17 02:49:47,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:47,110 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 394 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:47,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 655 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:49:47,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-12-17 02:49:47,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 613. [2021-12-17 02:49:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 531 states have (on average 1.384180790960452) internal successors, (735), 538 states have internal predecessors, (735), 60 states have call successors, (60), 22 states have call predecessors, (60), 21 states have return successors, (80), 55 states have call predecessors, (80), 53 states have call successors, (80) [2021-12-17 02:49:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 875 transitions. [2021-12-17 02:49:47,154 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 875 transitions. Word has length 22 [2021-12-17 02:49:47,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:47,154 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 875 transitions. [2021-12-17 02:49:47,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 875 transitions. [2021-12-17 02:49:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:49:47,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:47,158 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] [2021-12-17 02:49:47,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 02:49:47,158 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:47,159 INFO L85 PathProgramCache]: Analyzing trace with hash -278451968, now seen corresponding path program 1 times [2021-12-17 02:49:47,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:47,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562862852] [2021-12-17 02:49:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:47,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:47,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:49:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:47,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:49:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:47,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:47,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562862852] [2021-12-17 02:49:47,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562862852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:47,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:47,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:49:47,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113343947] [2021-12-17 02:49:47,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:47,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:49:47,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:47,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:49:47,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:49:47,214 INFO L87 Difference]: Start difference. First operand 613 states and 875 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:49:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:47,461 INFO L93 Difference]: Finished difference Result 674 states and 955 transitions. [2021-12-17 02:49:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:49:47,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-17 02:49:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:47,467 INFO L225 Difference]: With dead ends: 674 [2021-12-17 02:49:47,467 INFO L226 Difference]: Without dead ends: 669 [2021-12-17 02:49:47,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:49:47,469 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 188 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:47,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 996 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-17 02:49:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 648. [2021-12-17 02:49:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 564 states have (on average 1.375886524822695) internal successors, (776), 571 states have internal predecessors, (776), 60 states have call successors, (60), 22 states have call predecessors, (60), 23 states have return successors, (85), 55 states have call predecessors, (85), 53 states have call successors, (85) [2021-12-17 02:49:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 921 transitions. [2021-12-17 02:49:47,503 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 921 transitions. Word has length 30 [2021-12-17 02:49:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:47,503 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 921 transitions. [2021-12-17 02:49:47,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:49:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 921 transitions. [2021-12-17 02:49:47,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 02:49:47,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:47,506 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] [2021-12-17 02:49:47,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 02:49:47,506 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash 935646203, now seen corresponding path program 1 times [2021-12-17 02:49:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:47,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126192837] [2021-12-17 02:49:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:47,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:47,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:47,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126192837] [2021-12-17 02:49:47,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126192837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:47,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:47,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:49:47,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373654287] [2021-12-17 02:49:47,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:47,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:49:47,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:47,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:49:47,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:47,580 INFO L87 Difference]: Start difference. First operand 648 states and 921 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:47,654 INFO L93 Difference]: Finished difference Result 663 states and 941 transitions. [2021-12-17 02:49:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:49:47,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-17 02:49:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:47,657 INFO L225 Difference]: With dead ends: 663 [2021-12-17 02:49:47,658 INFO L226 Difference]: Without dead ends: 660 [2021-12-17 02:49:47,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:47,660 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 20 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:47,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 778 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:49:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-12-17 02:49:47,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 659. [2021-12-17 02:49:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 575 states have (on average 1.373913043478261) internal successors, (790), 581 states have internal predecessors, (790), 60 states have call successors, (60), 23 states have call predecessors, (60), 23 states have return successors, (85), 55 states have call predecessors, (85), 53 states have call successors, (85) [2021-12-17 02:49:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 935 transitions. [2021-12-17 02:49:47,693 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 935 transitions. Word has length 28 [2021-12-17 02:49:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:47,694 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 935 transitions. [2021-12-17 02:49:47,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 935 transitions. [2021-12-17 02:49:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:49:47,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:47,695 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] [2021-12-17 02:49:47,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 02:49:47,695 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash -525593641, now seen corresponding path program 1 times [2021-12-17 02:49:47,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:47,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220710465] [2021-12-17 02:49:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:47,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:47,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:49:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:47,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:49:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:47,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:47,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220710465] [2021-12-17 02:49:47,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220710465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:47,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:47,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:49:47,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816954728] [2021-12-17 02:49:47,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:47,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:49:47,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:47,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:49:47,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:47,806 INFO L87 Difference]: Start difference. First operand 659 states and 935 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:49:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:48,140 INFO L93 Difference]: Finished difference Result 686 states and 968 transitions. [2021-12-17 02:49:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:49:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-12-17 02:49:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:48,145 INFO L225 Difference]: With dead ends: 686 [2021-12-17 02:49:48,145 INFO L226 Difference]: Without dead ends: 680 [2021-12-17 02:49:48,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:49:48,147 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 681 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:48,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 948 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:49:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-12-17 02:49:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 659. [2021-12-17 02:49:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 575 states have (on average 1.3721739130434782) internal successors, (789), 581 states have internal predecessors, (789), 60 states have call successors, (60), 23 states have call predecessors, (60), 23 states have return successors, (85), 55 states have call predecessors, (85), 53 states have call successors, (85) [2021-12-17 02:49:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 934 transitions. [2021-12-17 02:49:48,175 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 934 transitions. Word has length 30 [2021-12-17 02:49:48,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:48,175 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 934 transitions. [2021-12-17 02:49:48,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:49:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 934 transitions. [2021-12-17 02:49:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 02:49:48,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:48,177 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] [2021-12-17 02:49:48,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 02:49:48,177 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:48,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1034674387, now seen corresponding path program 1 times [2021-12-17 02:49:48,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:48,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59485606] [2021-12-17 02:49:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:48,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:48,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:49:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:48,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:49:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:48,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:48,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59485606] [2021-12-17 02:49:48,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59485606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:48,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:48,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:49:48,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994468699] [2021-12-17 02:49:48,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:48,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:49:48,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:49:48,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:48,267 INFO L87 Difference]: Start difference. First operand 659 states and 934 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:49:48,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:48,674 INFO L93 Difference]: Finished difference Result 686 states and 967 transitions. [2021-12-17 02:49:48,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:49:48,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-12-17 02:49:48,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:48,678 INFO L225 Difference]: With dead ends: 686 [2021-12-17 02:49:48,678 INFO L226 Difference]: Without dead ends: 680 [2021-12-17 02:49:48,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:49:48,679 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 597 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:48,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 1201 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:49:48,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-12-17 02:49:48,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 659. [2021-12-17 02:49:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 575 states have (on average 1.3704347826086956) internal successors, (788), 581 states have internal predecessors, (788), 60 states have call successors, (60), 23 states have call predecessors, (60), 23 states have return successors, (85), 55 states have call predecessors, (85), 53 states have call successors, (85) [2021-12-17 02:49:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 933 transitions. [2021-12-17 02:49:48,705 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 933 transitions. Word has length 32 [2021-12-17 02:49:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:48,705 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 933 transitions. [2021-12-17 02:49:48,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:49:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 933 transitions. [2021-12-17 02:49:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 02:49:48,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:48,707 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] [2021-12-17 02:49:48,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 02:49:48,707 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1926147241, now seen corresponding path program 1 times [2021-12-17 02:49:48,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:48,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022384833] [2021-12-17 02:49:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:48,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:48,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:49:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:48,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:49:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:48,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:48,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022384833] [2021-12-17 02:49:48,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022384833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:48,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:48,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:49:48,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440238240] [2021-12-17 02:49:48,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:48,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:49:48,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:48,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:49:48,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:49:48,766 INFO L87 Difference]: Start difference. First operand 659 states and 933 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:49:49,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:49,088 INFO L93 Difference]: Finished difference Result 691 states and 972 transitions. [2021-12-17 02:49:49,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:49:49,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-12-17 02:49:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:49,092 INFO L225 Difference]: With dead ends: 691 [2021-12-17 02:49:49,092 INFO L226 Difference]: Without dead ends: 676 [2021-12-17 02:49:49,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:49,093 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 322 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:49,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 1758 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:49:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-12-17 02:49:49,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 657. [2021-12-17 02:49:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 574 states have (on average 1.3693379790940767) internal successors, (786), 580 states have internal predecessors, (786), 59 states have call successors, (59), 23 states have call predecessors, (59), 23 states have return successors, (84), 54 states have call predecessors, (84), 52 states have call successors, (84) [2021-12-17 02:49:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 929 transitions. [2021-12-17 02:49:49,119 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 929 transitions. Word has length 33 [2021-12-17 02:49:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:49,119 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 929 transitions. [2021-12-17 02:49:49,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:49:49,119 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 929 transitions. [2021-12-17 02:49:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 02:49:49,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:49,121 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] [2021-12-17 02:49:49,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 02:49:49,121 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:49,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:49,121 INFO L85 PathProgramCache]: Analyzing trace with hash 898874144, now seen corresponding path program 1 times [2021-12-17 02:49:49,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:49,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369793400] [2021-12-17 02:49:49,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:49,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:49,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:49:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:49,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:49:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:49,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:49,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369793400] [2021-12-17 02:49:49,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369793400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:49,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:49,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:49:49,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559259151] [2021-12-17 02:49:49,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:49,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:49:49,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:49:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:49:49,172 INFO L87 Difference]: Start difference. First operand 657 states and 929 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:49:49,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:49,444 INFO L93 Difference]: Finished difference Result 689 states and 968 transitions. [2021-12-17 02:49:49,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:49:49,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-12-17 02:49:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:49,449 INFO L225 Difference]: With dead ends: 689 [2021-12-17 02:49:49,449 INFO L226 Difference]: Without dead ends: 669 [2021-12-17 02:49:49,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:49,451 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 394 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:49,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 1464 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-17 02:49:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 650. [2021-12-17 02:49:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 570 states have (on average 1.3701754385964913) internal successors, (781), 576 states have internal predecessors, (781), 57 states have call successors, (57), 22 states have call predecessors, (57), 22 states have return successors, (82), 52 states have call predecessors, (82), 50 states have call successors, (82) [2021-12-17 02:49:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 920 transitions. [2021-12-17 02:49:49,481 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 920 transitions. Word has length 32 [2021-12-17 02:49:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:49,482 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 920 transitions. [2021-12-17 02:49:49,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:49:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 920 transitions. [2021-12-17 02:49:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:49:49,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:49,484 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] [2021-12-17 02:49:49,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 02:49:49,485 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:49,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:49,485 INFO L85 PathProgramCache]: Analyzing trace with hash -608614915, now seen corresponding path program 1 times [2021-12-17 02:49:49,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:49,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149022189] [2021-12-17 02:49:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:49,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:49,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:49,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149022189] [2021-12-17 02:49:49,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149022189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:49,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:49,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:49:49,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717559444] [2021-12-17 02:49:49,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:49,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:49:49,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:49,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:49:49,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:49,512 INFO L87 Difference]: Start difference. First operand 650 states and 920 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:49,541 INFO L93 Difference]: Finished difference Result 691 states and 968 transitions. [2021-12-17 02:49:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:49:49,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:49:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:49,545 INFO L225 Difference]: With dead ends: 691 [2021-12-17 02:49:49,545 INFO L226 Difference]: Without dead ends: 625 [2021-12-17 02:49:49,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:49,546 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 84 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:49,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 880 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:49:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-17 02:49:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 621. [2021-12-17 02:49:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 545 states have (on average 1.3688073394495412) internal successors, (746), 552 states have internal predecessors, (746), 55 states have call successors, (55), 21 states have call predecessors, (55), 20 states have return successors, (78), 48 states have call predecessors, (78), 48 states have call successors, (78) [2021-12-17 02:49:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 879 transitions. [2021-12-17 02:49:49,571 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 879 transitions. Word has length 30 [2021-12-17 02:49:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:49,572 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 879 transitions. [2021-12-17 02:49:49,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 879 transitions. [2021-12-17 02:49:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:49:49,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:49,573 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] [2021-12-17 02:49:49,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 02:49:49,574 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:49,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:49,574 INFO L85 PathProgramCache]: Analyzing trace with hash -444205803, now seen corresponding path program 1 times [2021-12-17 02:49:49,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:49,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78605992] [2021-12-17 02:49:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:49,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:49,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:49,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78605992] [2021-12-17 02:49:49,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78605992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:49,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:49,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:49:49,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922705646] [2021-12-17 02:49:49,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:49,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:49:49,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:49,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:49:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:49:49,603 INFO L87 Difference]: Start difference. First operand 621 states and 879 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:49,650 INFO L93 Difference]: Finished difference Result 657 states and 920 transitions. [2021-12-17 02:49:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:49:49,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:49:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:49,654 INFO L225 Difference]: With dead ends: 657 [2021-12-17 02:49:49,654 INFO L226 Difference]: Without dead ends: 637 [2021-12-17 02:49:49,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:49:49,655 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 27 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:49,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1213 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:49:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-12-17 02:49:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 623. [2021-12-17 02:49:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 547 states have (on average 1.3674588665447898) internal successors, (748), 554 states have internal predecessors, (748), 55 states have call successors, (55), 21 states have call predecessors, (55), 20 states have return successors, (78), 48 states have call predecessors, (78), 48 states have call successors, (78) [2021-12-17 02:49:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 881 transitions. [2021-12-17 02:49:49,682 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 881 transitions. Word has length 30 [2021-12-17 02:49:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:49,682 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 881 transitions. [2021-12-17 02:49:49,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:49,683 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 881 transitions. [2021-12-17 02:49:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 02:49:49,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:49,684 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] [2021-12-17 02:49:49,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 02:49:49,684 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:49,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:49,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1157172893, now seen corresponding path program 1 times [2021-12-17 02:49:49,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:49,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943750863] [2021-12-17 02:49:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:49,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:49,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943750863] [2021-12-17 02:49:49,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943750863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:49,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:49,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:49:49,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713890485] [2021-12-17 02:49:49,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:49,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:49:49,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:49,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:49:49,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:49:49,720 INFO L87 Difference]: Start difference. First operand 623 states and 881 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:49,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:49,764 INFO L93 Difference]: Finished difference Result 659 states and 922 transitions. [2021-12-17 02:49:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:49:49,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-17 02:49:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:49,768 INFO L225 Difference]: With dead ends: 659 [2021-12-17 02:49:49,768 INFO L226 Difference]: Without dead ends: 639 [2021-12-17 02:49:49,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:49:49,769 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 28 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:49,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1217 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:49:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-12-17 02:49:49,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 623. [2021-12-17 02:49:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 547 states have (on average 1.3674588665447898) internal successors, (748), 554 states have internal predecessors, (748), 55 states have call successors, (55), 21 states have call predecessors, (55), 20 states have return successors, (78), 48 states have call predecessors, (78), 48 states have call successors, (78) [2021-12-17 02:49:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 881 transitions. [2021-12-17 02:49:49,794 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 881 transitions. Word has length 31 [2021-12-17 02:49:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:49,794 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 881 transitions. [2021-12-17 02:49:49,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 881 transitions. [2021-12-17 02:49:49,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 02:49:49,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:49,795 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] [2021-12-17 02:49:49,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 02:49:49,796 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:49,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1727959565, now seen corresponding path program 1 times [2021-12-17 02:49:49,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:49,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642383826] [2021-12-17 02:49:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:49,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:49,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:49:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:49,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:49,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642383826] [2021-12-17 02:49:49,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642383826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:49,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:49,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:49:49,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765622854] [2021-12-17 02:49:49,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:49,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:49:49,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:49:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:49:49,829 INFO L87 Difference]: Start difference. First operand 623 states and 881 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:50,072 INFO L93 Difference]: Finished difference Result 884 states and 1250 transitions. [2021-12-17 02:49:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:49:50,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-12-17 02:49:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:50,077 INFO L225 Difference]: With dead ends: 884 [2021-12-17 02:49:50,077 INFO L226 Difference]: Without dead ends: 881 [2021-12-17 02:49:50,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:49:50,078 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 162 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:50,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1133 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-12-17 02:49:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 702. [2021-12-17 02:49:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 622 states have (on average 1.3762057877813505) internal successors, (856), 630 states have internal predecessors, (856), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (80), 49 states have call predecessors, (80), 50 states have call successors, (80) [2021-12-17 02:49:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 993 transitions. [2021-12-17 02:49:50,119 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 993 transitions. Word has length 34 [2021-12-17 02:49:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:50,120 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 993 transitions. [2021-12-17 02:49:50,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 993 transitions. [2021-12-17 02:49:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 02:49:50,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:50,121 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] [2021-12-17 02:49:50,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 02:49:50,121 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:50,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:50,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2030213193, now seen corresponding path program 1 times [2021-12-17 02:49:50,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:50,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390136712] [2021-12-17 02:49:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:50,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:50,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:49:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:50,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390136712] [2021-12-17 02:49:50,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390136712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:50,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:50,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:49:50,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900257523] [2021-12-17 02:49:50,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:50,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:49:50,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:50,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:49:50,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:49:50,172 INFO L87 Difference]: Start difference. First operand 702 states and 993 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:50,334 INFO L93 Difference]: Finished difference Result 733 states and 1030 transitions. [2021-12-17 02:49:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:49:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-12-17 02:49:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:50,338 INFO L225 Difference]: With dead ends: 733 [2021-12-17 02:49:50,338 INFO L226 Difference]: Without dead ends: 717 [2021-12-17 02:49:50,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:49:50,339 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 85 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:50,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1396 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:49:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-12-17 02:49:50,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 700. [2021-12-17 02:49:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 621 states have (on average 1.3752012882447664) internal successors, (854), 629 states have internal predecessors, (854), 56 states have call successors, (56), 23 states have call predecessors, (56), 22 states have return successors, (79), 48 states have call predecessors, (79), 49 states have call successors, (79) [2021-12-17 02:49:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 989 transitions. [2021-12-17 02:49:50,367 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 989 transitions. Word has length 33 [2021-12-17 02:49:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:50,367 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 989 transitions. [2021-12-17 02:49:50,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:50,367 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 989 transitions. [2021-12-17 02:49:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 02:49:50,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:50,369 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] [2021-12-17 02:49:50,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 02:49:50,369 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:50,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2029473173, now seen corresponding path program 1 times [2021-12-17 02:49:50,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:50,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278147307] [2021-12-17 02:49:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:50,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:50,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:49:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:50,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:50,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278147307] [2021-12-17 02:49:50,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278147307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:50,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:50,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:49:50,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801843934] [2021-12-17 02:49:50,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:50,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:49:50,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:50,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:49:50,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:49:50,429 INFO L87 Difference]: Start difference. First operand 700 states and 989 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:50,804 INFO L93 Difference]: Finished difference Result 1172 states and 1614 transitions. [2021-12-17 02:49:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:49:50,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-17 02:49:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:50,808 INFO L225 Difference]: With dead ends: 1172 [2021-12-17 02:49:50,808 INFO L226 Difference]: Without dead ends: 729 [2021-12-17 02:49:50,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:50,809 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 721 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:50,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 935 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:49:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-12-17 02:49:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 691. [2021-12-17 02:49:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 612 states have (on average 1.3611111111111112) internal successors, (833), 620 states have internal predecessors, (833), 56 states have call successors, (56), 23 states have call predecessors, (56), 22 states have return successors, (79), 48 states have call predecessors, (79), 49 states have call successors, (79) [2021-12-17 02:49:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 968 transitions. [2021-12-17 02:49:50,841 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 968 transitions. Word has length 35 [2021-12-17 02:49:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:50,841 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 968 transitions. [2021-12-17 02:49:50,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 968 transitions. [2021-12-17 02:49:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 02:49:50,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:50,842 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] [2021-12-17 02:49:50,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 02:49:50,843 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:50,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1933424636, now seen corresponding path program 1 times [2021-12-17 02:49:50,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:50,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970008085] [2021-12-17 02:49:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:50,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:50,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 02:49:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:50,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:50,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970008085] [2021-12-17 02:49:50,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970008085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:50,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:50,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:49:50,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568163409] [2021-12-17 02:49:50,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:50,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:49:50,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:50,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:49:50,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:49:50,887 INFO L87 Difference]: Start difference. First operand 691 states and 968 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:51,040 INFO L93 Difference]: Finished difference Result 722 states and 1005 transitions. [2021-12-17 02:49:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:49:51,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-17 02:49:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:51,044 INFO L225 Difference]: With dead ends: 722 [2021-12-17 02:49:51,044 INFO L226 Difference]: Without dead ends: 706 [2021-12-17 02:49:51,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:49:51,045 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 85 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:51,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1383 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:49:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-12-17 02:49:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 689. [2021-12-17 02:49:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 611 states have (on average 1.3600654664484453) internal successors, (831), 619 states have internal predecessors, (831), 55 states have call successors, (55), 23 states have call predecessors, (55), 22 states have return successors, (78), 47 states have call predecessors, (78), 48 states have call successors, (78) [2021-12-17 02:49:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 964 transitions. [2021-12-17 02:49:51,086 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 964 transitions. Word has length 35 [2021-12-17 02:49:51,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:51,086 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 964 transitions. [2021-12-17 02:49:51,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 964 transitions. [2021-12-17 02:49:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 02:49:51,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:51,088 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] [2021-12-17 02:49:51,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 02:49:51,090 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:51,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2075108197, now seen corresponding path program 1 times [2021-12-17 02:49:51,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:51,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748848742] [2021-12-17 02:49:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:51,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:51,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:51,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748848742] [2021-12-17 02:49:51,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748848742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:51,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:51,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:49:51,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580713882] [2021-12-17 02:49:51,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:51,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:49:51,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:51,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:49:51,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:51,129 INFO L87 Difference]: Start difference. First operand 689 states and 964 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:51,185 INFO L93 Difference]: Finished difference Result 1096 states and 1521 transitions. [2021-12-17 02:49:51,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:49:51,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-17 02:49:51,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:51,188 INFO L225 Difference]: With dead ends: 1096 [2021-12-17 02:49:51,189 INFO L226 Difference]: Without dead ends: 697 [2021-12-17 02:49:51,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:49:51,190 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 5 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:51,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 766 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:49:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-12-17 02:49:51,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 697. [2021-12-17 02:49:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 619 states have (on average 1.3602584814216478) internal successors, (842), 627 states have internal predecessors, (842), 55 states have call successors, (55), 23 states have call predecessors, (55), 22 states have return successors, (78), 47 states have call predecessors, (78), 48 states have call successors, (78) [2021-12-17 02:49:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 975 transitions. [2021-12-17 02:49:51,220 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 975 transitions. Word has length 37 [2021-12-17 02:49:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:51,220 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 975 transitions. [2021-12-17 02:49:51,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 975 transitions. [2021-12-17 02:49:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 02:49:51,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:51,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:51,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 02:49:51,222 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:51,222 INFO L85 PathProgramCache]: Analyzing trace with hash 657684690, now seen corresponding path program 1 times [2021-12-17 02:49:51,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:51,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955771964] [2021-12-17 02:49:51,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:51,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:51,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 02:49:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:51,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955771964] [2021-12-17 02:49:51,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955771964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:51,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:51,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:49:51,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100169614] [2021-12-17 02:49:51,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:51,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:49:51,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:49:51,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:49:51,269 INFO L87 Difference]: Start difference. First operand 697 states and 975 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:51,466 INFO L93 Difference]: Finished difference Result 722 states and 1002 transitions. [2021-12-17 02:49:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:49:51,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-12-17 02:49:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:51,470 INFO L225 Difference]: With dead ends: 722 [2021-12-17 02:49:51,470 INFO L226 Difference]: Without dead ends: 704 [2021-12-17 02:49:51,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:51,473 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 96 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1705 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:51,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1705 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-17 02:49:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 697. [2021-12-17 02:49:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 619 states have (on average 1.3408723747980613) internal successors, (830), 627 states have internal predecessors, (830), 55 states have call successors, (55), 23 states have call predecessors, (55), 22 states have return successors, (78), 47 states have call predecessors, (78), 48 states have call successors, (78) [2021-12-17 02:49:51,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 963 transitions. [2021-12-17 02:49:51,514 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 963 transitions. Word has length 38 [2021-12-17 02:49:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:51,515 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 963 transitions. [2021-12-17 02:49:51,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 963 transitions. [2021-12-17 02:49:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 02:49:51,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:51,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:51,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 02:49:51,517 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:51,517 INFO L85 PathProgramCache]: Analyzing trace with hash 101448372, now seen corresponding path program 1 times [2021-12-17 02:49:51,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:51,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108018957] [2021-12-17 02:49:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:51,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:51,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 02:49:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:51,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:51,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108018957] [2021-12-17 02:49:51,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108018957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:51,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:51,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:49:51,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266024189] [2021-12-17 02:49:51,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:51,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:49:51,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:51,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:49:51,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:49:51,563 INFO L87 Difference]: Start difference. First operand 697 states and 963 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:51,892 INFO L93 Difference]: Finished difference Result 783 states and 1067 transitions. [2021-12-17 02:49:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:49:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-12-17 02:49:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:51,895 INFO L225 Difference]: With dead ends: 783 [2021-12-17 02:49:51,895 INFO L226 Difference]: Without dead ends: 717 [2021-12-17 02:49:51,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:49:51,897 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 525 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:51,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 1399 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-12-17 02:49:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 707. [2021-12-17 02:49:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 626 states have (on average 1.3354632587859425) internal successors, (836), 637 states have internal predecessors, (836), 55 states have call successors, (55), 23 states have call predecessors, (55), 25 states have return successors, (82), 47 states have call predecessors, (82), 48 states have call successors, (82) [2021-12-17 02:49:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 973 transitions. [2021-12-17 02:49:51,931 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 973 transitions. Word has length 38 [2021-12-17 02:49:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:51,932 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 973 transitions. [2021-12-17 02:49:51,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:51,932 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 973 transitions. [2021-12-17 02:49:51,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 02:49:51,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:51,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:51,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 02:49:51,934 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:51,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:51,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2119312611, now seen corresponding path program 1 times [2021-12-17 02:49:51,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:51,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053082383] [2021-12-17 02:49:51,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:51,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:51,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 02:49:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:51,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:51,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053082383] [2021-12-17 02:49:51,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053082383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:51,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:51,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:49:51,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028706243] [2021-12-17 02:49:51,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:51,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:49:51,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:49:51,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:49:51,999 INFO L87 Difference]: Start difference. First operand 707 states and 973 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:52,221 INFO L93 Difference]: Finished difference Result 727 states and 993 transitions. [2021-12-17 02:49:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:49:52,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-12-17 02:49:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:52,225 INFO L225 Difference]: With dead ends: 727 [2021-12-17 02:49:52,225 INFO L226 Difference]: Without dead ends: 705 [2021-12-17 02:49:52,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:49:52,226 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 108 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:52,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1987 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-12-17 02:49:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 699. [2021-12-17 02:49:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 619 states have (on average 1.3344103392568658) internal successors, (826), 630 states have internal predecessors, (826), 54 states have call successors, (54), 23 states have call predecessors, (54), 25 states have return successors, (81), 46 states have call predecessors, (81), 47 states have call successors, (81) [2021-12-17 02:49:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 961 transitions. [2021-12-17 02:49:52,258 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 961 transitions. Word has length 39 [2021-12-17 02:49:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:52,258 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 961 transitions. [2021-12-17 02:49:52,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 961 transitions. [2021-12-17 02:49:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 02:49:52,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:52,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:52,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 02:49:52,260 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:52,261 INFO L85 PathProgramCache]: Analyzing trace with hash 114444064, now seen corresponding path program 1 times [2021-12-17 02:49:52,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:52,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655319023] [2021-12-17 02:49:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:52,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:52,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:49:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:52,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:52,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655319023] [2021-12-17 02:49:52,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655319023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:52,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:52,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:49:52,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000830907] [2021-12-17 02:49:52,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:52,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:49:52,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:49:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:49:52,307 INFO L87 Difference]: Start difference. First operand 699 states and 961 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:52,581 INFO L93 Difference]: Finished difference Result 754 states and 1025 transitions. [2021-12-17 02:49:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:49:52,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-12-17 02:49:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:52,585 INFO L225 Difference]: With dead ends: 754 [2021-12-17 02:49:52,585 INFO L226 Difference]: Without dead ends: 709 [2021-12-17 02:49:52,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:49:52,586 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 343 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:52,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 1648 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-12-17 02:49:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 686. [2021-12-17 02:49:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 607 states have (on average 1.331136738056013) internal successors, (808), 618 states have internal predecessors, (808), 53 states have call successors, (53), 23 states have call predecessors, (53), 25 states have return successors, (80), 45 states have call predecessors, (80), 46 states have call successors, (80) [2021-12-17 02:49:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 941 transitions. [2021-12-17 02:49:52,624 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 941 transitions. Word has length 39 [2021-12-17 02:49:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:52,624 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 941 transitions. [2021-12-17 02:49:52,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 941 transitions. [2021-12-17 02:49:52,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 02:49:52,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:52,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:52,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 02:49:52,627 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:52,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2104766079, now seen corresponding path program 1 times [2021-12-17 02:49:52,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:52,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292859808] [2021-12-17 02:49:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:52,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:52,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:49:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:52,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:52,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292859808] [2021-12-17 02:49:52,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292859808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:52,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:52,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:49:52,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447624533] [2021-12-17 02:49:52,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:52,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:49:52,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:52,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:49:52,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:49:52,689 INFO L87 Difference]: Start difference. First operand 686 states and 941 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:52,913 INFO L93 Difference]: Finished difference Result 712 states and 971 transitions. [2021-12-17 02:49:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:49:52,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-12-17 02:49:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:52,916 INFO L225 Difference]: With dead ends: 712 [2021-12-17 02:49:52,916 INFO L226 Difference]: Without dead ends: 689 [2021-12-17 02:49:52,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:52,917 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 58 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:52,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1777 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:52,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-12-17 02:49:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 688. [2021-12-17 02:49:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 608 states have (on average 1.330592105263158) internal successors, (809), 620 states have internal predecessors, (809), 53 states have call successors, (53), 23 states have call predecessors, (53), 26 states have return successors, (81), 45 states have call predecessors, (81), 46 states have call successors, (81) [2021-12-17 02:49:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 943 transitions. [2021-12-17 02:49:52,948 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 943 transitions. Word has length 39 [2021-12-17 02:49:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:52,948 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 943 transitions. [2021-12-17 02:49:52,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 943 transitions. [2021-12-17 02:49:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 02:49:52,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:52,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:52,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 02:49:52,950 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:52,951 INFO L85 PathProgramCache]: Analyzing trace with hash 225426455, now seen corresponding path program 1 times [2021-12-17 02:49:52,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:52,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158227850] [2021-12-17 02:49:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:52,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:52,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:49:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:52,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158227850] [2021-12-17 02:49:52,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158227850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:52,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:52,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:49:52,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185665377] [2021-12-17 02:49:52,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:52,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:49:52,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:52,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:49:52,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:49:52,988 INFO L87 Difference]: Start difference. First operand 688 states and 943 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:53,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:53,248 INFO L93 Difference]: Finished difference Result 772 states and 1027 transitions. [2021-12-17 02:49:53,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:49:53,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-12-17 02:49:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:53,250 INFO L225 Difference]: With dead ends: 772 [2021-12-17 02:49:53,250 INFO L226 Difference]: Without dead ends: 510 [2021-12-17 02:49:53,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:49:53,252 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 478 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:53,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 937 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-17 02:49:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 469. [2021-12-17 02:49:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 411 states have (on average 1.29683698296837) internal successors, (533), 422 states have internal predecessors, (533), 38 states have call successors, (38), 16 states have call predecessors, (38), 19 states have return successors, (45), 31 states have call predecessors, (45), 31 states have call successors, (45) [2021-12-17 02:49:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 616 transitions. [2021-12-17 02:49:53,276 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 616 transitions. Word has length 41 [2021-12-17 02:49:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:53,276 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 616 transitions. [2021-12-17 02:49:53,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 616 transitions. [2021-12-17 02:49:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 02:49:53,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:53,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:53,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 02:49:53,277 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:53,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:53,279 INFO L85 PathProgramCache]: Analyzing trace with hash -974540775, now seen corresponding path program 1 times [2021-12-17 02:49:53,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:53,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790899653] [2021-12-17 02:49:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:53,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:53,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 02:49:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:53,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:53,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790899653] [2021-12-17 02:49:53,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790899653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:53,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:53,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:49:53,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770536238] [2021-12-17 02:49:53,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:53,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:49:53,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:53,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:49:53,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:49:53,343 INFO L87 Difference]: Start difference. First operand 469 states and 616 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:53,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:53,629 INFO L93 Difference]: Finished difference Result 783 states and 1041 transitions. [2021-12-17 02:49:53,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:49:53,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-12-17 02:49:53,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:53,632 INFO L225 Difference]: With dead ends: 783 [2021-12-17 02:49:53,632 INFO L226 Difference]: Without dead ends: 506 [2021-12-17 02:49:53,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:49:53,633 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 451 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:53,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 1055 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:53,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-12-17 02:49:53,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 473. [2021-12-17 02:49:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 415 states have (on average 1.2939759036144578) internal successors, (537), 426 states have internal predecessors, (537), 38 states have call successors, (38), 16 states have call predecessors, (38), 19 states have return successors, (45), 31 states have call predecessors, (45), 31 states have call successors, (45) [2021-12-17 02:49:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 620 transitions. [2021-12-17 02:49:53,660 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 620 transitions. Word has length 40 [2021-12-17 02:49:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:53,660 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 620 transitions. [2021-12-17 02:49:53,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 620 transitions. [2021-12-17 02:49:53,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 02:49:53,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:53,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:53,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 02:49:53,662 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:53,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1588334311, now seen corresponding path program 1 times [2021-12-17 02:49:53,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:53,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936903032] [2021-12-17 02:49:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:53,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:53,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 02:49:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:53,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:53,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936903032] [2021-12-17 02:49:53,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936903032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:53,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:53,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:49:53,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960823152] [2021-12-17 02:49:53,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:53,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:49:53,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:53,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:49:53,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:49:53,703 INFO L87 Difference]: Start difference. First operand 473 states and 620 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:53,913 INFO L93 Difference]: Finished difference Result 571 states and 746 transitions. [2021-12-17 02:49:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:49:53,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-12-17 02:49:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:53,916 INFO L225 Difference]: With dead ends: 571 [2021-12-17 02:49:53,916 INFO L226 Difference]: Without dead ends: 501 [2021-12-17 02:49:53,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:49:53,917 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 180 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:53,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 931 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:53,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-12-17 02:49:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 447. [2021-12-17 02:49:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 391 states have (on average 1.3094629156010231) internal successors, (512), 403 states have internal predecessors, (512), 37 states have call successors, (37), 15 states have call predecessors, (37), 18 states have return successors, (45), 29 states have call predecessors, (45), 30 states have call successors, (45) [2021-12-17 02:49:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 594 transitions. [2021-12-17 02:49:53,940 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 594 transitions. Word has length 40 [2021-12-17 02:49:53,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:53,941 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 594 transitions. [2021-12-17 02:49:53,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:53,941 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 594 transitions. [2021-12-17 02:49:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 02:49:53,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:53,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:53,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 02:49:53,943 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:53,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1541633835, now seen corresponding path program 1 times [2021-12-17 02:49:53,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:53,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387092444] [2021-12-17 02:49:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:53,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:53,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 02:49:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:54,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:54,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387092444] [2021-12-17 02:49:54,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387092444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:54,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:54,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:49:54,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772847650] [2021-12-17 02:49:54,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:54,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:49:54,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:49:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:54,027 INFO L87 Difference]: Start difference. First operand 447 states and 594 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:54,311 INFO L93 Difference]: Finished difference Result 495 states and 660 transitions. [2021-12-17 02:49:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:49:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-12-17 02:49:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:54,314 INFO L225 Difference]: With dead ends: 495 [2021-12-17 02:49:54,314 INFO L226 Difference]: Without dead ends: 491 [2021-12-17 02:49:54,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:49:54,315 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 282 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1812 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:54,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 1812 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-17 02:49:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 462. [2021-12-17 02:49:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 405 states have (on average 1.2987654320987654) internal successors, (526), 417 states have internal predecessors, (526), 37 states have call successors, (37), 15 states have call predecessors, (37), 19 states have return successors, (53), 30 states have call predecessors, (53), 30 states have call successors, (53) [2021-12-17 02:49:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 616 transitions. [2021-12-17 02:49:54,339 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 616 transitions. Word has length 41 [2021-12-17 02:49:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:54,339 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 616 transitions. [2021-12-17 02:49:54,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 616 transitions. [2021-12-17 02:49:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 02:49:54,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:54,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:54,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 02:49:54,341 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:54,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:54,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1541357005, now seen corresponding path program 1 times [2021-12-17 02:49:54,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:54,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485878895] [2021-12-17 02:49:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:54,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:54,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 02:49:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:54,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:54,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485878895] [2021-12-17 02:49:54,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485878895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:54,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:54,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:49:54,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475195841] [2021-12-17 02:49:54,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:54,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:49:54,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:54,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:49:54,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:54,392 INFO L87 Difference]: Start difference. First operand 462 states and 616 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:54,717 INFO L93 Difference]: Finished difference Result 482 states and 637 transitions. [2021-12-17 02:49:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:49:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-12-17 02:49:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:54,720 INFO L225 Difference]: With dead ends: 482 [2021-12-17 02:49:54,720 INFO L226 Difference]: Without dead ends: 469 [2021-12-17 02:49:54,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:49:54,721 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 78 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:54,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1895 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:49:54,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-17 02:49:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 459. [2021-12-17 02:49:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 402 states have (on average 1.300995024875622) internal successors, (523), 415 states have internal predecessors, (523), 37 states have call successors, (37), 15 states have call predecessors, (37), 19 states have return successors, (52), 29 states have call predecessors, (52), 30 states have call successors, (52) [2021-12-17 02:49:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 612 transitions. [2021-12-17 02:49:54,756 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 612 transitions. Word has length 41 [2021-12-17 02:49:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:54,756 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 612 transitions. [2021-12-17 02:49:54,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 612 transitions. [2021-12-17 02:49:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 02:49:54,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:54,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:54,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 02:49:54,760 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash -681787036, now seen corresponding path program 1 times [2021-12-17 02:49:54,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:54,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752068625] [2021-12-17 02:49:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:54,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:54,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 02:49:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:54,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:54,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752068625] [2021-12-17 02:49:54,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752068625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:54,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:54,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:49:54,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939244018] [2021-12-17 02:49:54,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:54,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:49:54,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:54,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:49:54,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:49:54,819 INFO L87 Difference]: Start difference. First operand 459 states and 612 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:55,150 INFO L93 Difference]: Finished difference Result 519 states and 686 transitions. [2021-12-17 02:49:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:49:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-12-17 02:49:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:55,154 INFO L225 Difference]: With dead ends: 519 [2021-12-17 02:49:55,154 INFO L226 Difference]: Without dead ends: 503 [2021-12-17 02:49:55,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:49:55,155 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 596 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:55,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 1084 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-12-17 02:49:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 445. [2021-12-17 02:49:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 390 states have (on average 1.3076923076923077) internal successors, (510), 402 states have internal predecessors, (510), 36 states have call successors, (36), 15 states have call predecessors, (36), 18 states have return successors, (44), 28 states have call predecessors, (44), 29 states have call successors, (44) [2021-12-17 02:49:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 590 transitions. [2021-12-17 02:49:55,178 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 590 transitions. Word has length 42 [2021-12-17 02:49:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:55,178 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 590 transitions. [2021-12-17 02:49:55,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 590 transitions. [2021-12-17 02:49:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 02:49:55,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:55,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:55,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 02:49:55,183 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:55,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1773882886, now seen corresponding path program 1 times [2021-12-17 02:49:55,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:55,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096925306] [2021-12-17 02:49:55,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:55,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:55,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:49:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:55,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:55,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096925306] [2021-12-17 02:49:55,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096925306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:55,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:55,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:49:55,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834237098] [2021-12-17 02:49:55,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:55,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:49:55,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:55,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:49:55,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:49:55,304 INFO L87 Difference]: Start difference. First operand 445 states and 590 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:55,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:55,543 INFO L93 Difference]: Finished difference Result 645 states and 860 transitions. [2021-12-17 02:49:55,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:49:55,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-12-17 02:49:55,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:55,545 INFO L225 Difference]: With dead ends: 645 [2021-12-17 02:49:55,545 INFO L226 Difference]: Without dead ends: 405 [2021-12-17 02:49:55,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:55,547 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 102 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:55,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1754 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-17 02:49:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 399. [2021-12-17 02:49:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 350 states have (on average 1.2885714285714285) internal successors, (451), 358 states have internal predecessors, (451), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (39), 27 states have call predecessors, (39), 28 states have call successors, (39) [2021-12-17 02:49:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 524 transitions. [2021-12-17 02:49:55,569 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 524 transitions. Word has length 44 [2021-12-17 02:49:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:55,569 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 524 transitions. [2021-12-17 02:49:55,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 524 transitions. [2021-12-17 02:49:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 02:49:55,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:55,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:55,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 02:49:55,571 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:55,572 INFO L85 PathProgramCache]: Analyzing trace with hash -126970977, now seen corresponding path program 1 times [2021-12-17 02:49:55,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:55,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511153063] [2021-12-17 02:49:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:55,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:55,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:49:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:55,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:55,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511153063] [2021-12-17 02:49:55,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511153063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:55,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:55,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:49:55,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759686051] [2021-12-17 02:49:55,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:55,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:49:55,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:55,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:49:55,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:49:55,635 INFO L87 Difference]: Start difference. First operand 399 states and 524 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:55,899 INFO L93 Difference]: Finished difference Result 599 states and 789 transitions. [2021-12-17 02:49:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:49:55,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-12-17 02:49:55,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:55,902 INFO L225 Difference]: With dead ends: 599 [2021-12-17 02:49:55,902 INFO L226 Difference]: Without dead ends: 405 [2021-12-17 02:49:55,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:49:55,903 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 390 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:55,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 1008 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-17 02:49:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 399. [2021-12-17 02:49:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 350 states have (on average 1.282857142857143) internal successors, (449), 358 states have internal predecessors, (449), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (39), 27 states have call predecessors, (39), 28 states have call successors, (39) [2021-12-17 02:49:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 522 transitions. [2021-12-17 02:49:55,924 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 522 transitions. Word has length 46 [2021-12-17 02:49:55,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:55,925 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 522 transitions. [2021-12-17 02:49:55,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 522 transitions. [2021-12-17 02:49:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 02:49:55,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:55,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:55,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 02:49:55,927 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:55,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1699061038, now seen corresponding path program 1 times [2021-12-17 02:49:55,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:55,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035558465] [2021-12-17 02:49:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:55,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:55,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 02:49:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:55,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:55,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035558465] [2021-12-17 02:49:55,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035558465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:55,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:55,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:49:55,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136715261] [2021-12-17 02:49:55,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:55,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:49:55,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:49:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:55,986 INFO L87 Difference]: Start difference. First operand 399 states and 522 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:56,309 INFO L93 Difference]: Finished difference Result 417 states and 540 transitions. [2021-12-17 02:49:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:49:56,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-12-17 02:49:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:56,312 INFO L225 Difference]: With dead ends: 417 [2021-12-17 02:49:56,312 INFO L226 Difference]: Without dead ends: 401 [2021-12-17 02:49:56,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:49:56,313 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 74 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:56,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1883 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:49:56,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-12-17 02:49:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 395. [2021-12-17 02:49:56,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 347 states have (on average 1.282420749279539) internal successors, (445), 355 states have internal predecessors, (445), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (38), 26 states have call predecessors, (38), 27 states have call successors, (38) [2021-12-17 02:49:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 516 transitions. [2021-12-17 02:49:56,341 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 516 transitions. Word has length 46 [2021-12-17 02:49:56,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:56,341 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 516 transitions. [2021-12-17 02:49:56,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:56,342 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 516 transitions. [2021-12-17 02:49:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 02:49:56,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:56,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:56,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 02:49:56,343 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:56,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1875666142, now seen corresponding path program 1 times [2021-12-17 02:49:56,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:56,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662637390] [2021-12-17 02:49:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:56,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:56,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:49:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:56,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 02:49:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:56,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662637390] [2021-12-17 02:49:56,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662637390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:56,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:56,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:49:56,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900901046] [2021-12-17 02:49:56,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:56,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:49:56,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:56,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:49:56,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:49:56,392 INFO L87 Difference]: Start difference. First operand 395 states and 516 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:49:56,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:56,716 INFO L93 Difference]: Finished difference Result 418 states and 540 transitions. [2021-12-17 02:49:56,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:49:56,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-12-17 02:49:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:56,719 INFO L225 Difference]: With dead ends: 418 [2021-12-17 02:49:56,719 INFO L226 Difference]: Without dead ends: 396 [2021-12-17 02:49:56,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:49:56,720 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 148 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:56,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1477 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:49:56,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-17 02:49:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 390. [2021-12-17 02:49:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 344 states have (on average 1.2819767441860466) internal successors, (441), 351 states have internal predecessors, (441), 32 states have call successors, (32), 13 states have call predecessors, (32), 13 states have return successors, (37), 26 states have call predecessors, (37), 26 states have call successors, (37) [2021-12-17 02:49:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 510 transitions. [2021-12-17 02:49:56,750 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 510 transitions. Word has length 48 [2021-12-17 02:49:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:56,750 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 510 transitions. [2021-12-17 02:49:56,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:49:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 510 transitions. [2021-12-17 02:49:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 02:49:56,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:56,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:56,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 02:49:56,752 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:56,753 INFO L85 PathProgramCache]: Analyzing trace with hash 712165053, now seen corresponding path program 1 times [2021-12-17 02:49:56,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:56,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924748082] [2021-12-17 02:49:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:56,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:56,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:49:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:56,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:56,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924748082] [2021-12-17 02:49:56,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924748082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:56,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:56,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:49:56,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515970919] [2021-12-17 02:49:56,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:56,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:49:56,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:56,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:49:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:49:56,810 INFO L87 Difference]: Start difference. First operand 390 states and 510 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:56,997 INFO L93 Difference]: Finished difference Result 663 states and 861 transitions. [2021-12-17 02:49:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:49:56,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-12-17 02:49:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:57,000 INFO L225 Difference]: With dead ends: 663 [2021-12-17 02:49:57,000 INFO L226 Difference]: Without dead ends: 475 [2021-12-17 02:49:57,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:49:57,001 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 189 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:57,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 849 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-17 02:49:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 443. [2021-12-17 02:49:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 392 states have (on average 1.280612244897959) internal successors, (502), 398 states have internal predecessors, (502), 34 states have call successors, (34), 15 states have call predecessors, (34), 16 states have return successors, (43), 30 states have call predecessors, (43), 29 states have call successors, (43) [2021-12-17 02:49:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 579 transitions. [2021-12-17 02:49:57,030 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 579 transitions. Word has length 49 [2021-12-17 02:49:57,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:57,031 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 579 transitions. [2021-12-17 02:49:57,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:57,031 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 579 transitions. [2021-12-17 02:49:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 02:49:57,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:57,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:57,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 02:49:57,033 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1620758026, now seen corresponding path program 1 times [2021-12-17 02:49:57,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:57,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618327701] [2021-12-17 02:49:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:57,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:57,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:49:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:57,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618327701] [2021-12-17 02:49:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618327701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:57,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:57,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:49:57,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109060381] [2021-12-17 02:49:57,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:57,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:49:57,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:49:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:49:57,095 INFO L87 Difference]: Start difference. First operand 443 states and 579 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:57,243 INFO L93 Difference]: Finished difference Result 528 states and 679 transitions. [2021-12-17 02:49:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:49:57,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-12-17 02:49:57,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:57,245 INFO L225 Difference]: With dead ends: 528 [2021-12-17 02:49:57,245 INFO L226 Difference]: Without dead ends: 456 [2021-12-17 02:49:57,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:49:57,246 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 70 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:57,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1096 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:49:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-17 02:49:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 445. [2021-12-17 02:49:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 394 states have (on average 1.2791878172588833) internal successors, (504), 400 states have internal predecessors, (504), 34 states have call successors, (34), 15 states have call predecessors, (34), 16 states have return successors, (43), 30 states have call predecessors, (43), 29 states have call successors, (43) [2021-12-17 02:49:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 581 transitions. [2021-12-17 02:49:57,274 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 581 transitions. Word has length 48 [2021-12-17 02:49:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:57,275 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 581 transitions. [2021-12-17 02:49:57,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 581 transitions. [2021-12-17 02:49:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 02:49:57,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:57,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:57,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 02:49:57,277 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:57,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:57,277 INFO L85 PathProgramCache]: Analyzing trace with hash -979201482, now seen corresponding path program 1 times [2021-12-17 02:49:57,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:57,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265181328] [2021-12-17 02:49:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:57,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:57,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:49:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:57,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:57,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265181328] [2021-12-17 02:49:57,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265181328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:57,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:57,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:49:57,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423327440] [2021-12-17 02:49:57,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:57,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:49:57,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:49:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:57,342 INFO L87 Difference]: Start difference. First operand 445 states and 581 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:57,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:57,543 INFO L93 Difference]: Finished difference Result 455 states and 590 transitions. [2021-12-17 02:49:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:49:57,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-12-17 02:49:57,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:57,546 INFO L225 Difference]: With dead ends: 455 [2021-12-17 02:49:57,546 INFO L226 Difference]: Without dead ends: 419 [2021-12-17 02:49:57,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:49:57,547 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 55 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:57,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 1884 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-17 02:49:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2021-12-17 02:49:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 369 states have (on average 1.2628726287262872) internal successors, (466), 373 states have internal predecessors, (466), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (41), 29 states have call predecessors, (41), 28 states have call successors, (41) [2021-12-17 02:49:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 539 transitions. [2021-12-17 02:49:57,571 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 539 transitions. Word has length 48 [2021-12-17 02:49:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:57,571 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 539 transitions. [2021-12-17 02:49:57,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 539 transitions. [2021-12-17 02:49:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 02:49:57,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:57,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:57,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 02:49:57,573 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:57,573 INFO L85 PathProgramCache]: Analyzing trace with hash -697229217, now seen corresponding path program 1 times [2021-12-17 02:49:57,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:57,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463736467] [2021-12-17 02:49:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:57,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:57,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 02:49:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:57,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:57,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463736467] [2021-12-17 02:49:57,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463736467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:57,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:57,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:49:57,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373135857] [2021-12-17 02:49:57,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:57,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:49:57,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:57,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:49:57,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:49:57,640 INFO L87 Difference]: Start difference. First operand 417 states and 539 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:57,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:57,852 INFO L93 Difference]: Finished difference Result 667 states and 865 transitions. [2021-12-17 02:49:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:49:57,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-17 02:49:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:57,855 INFO L225 Difference]: With dead ends: 667 [2021-12-17 02:49:57,855 INFO L226 Difference]: Without dead ends: 446 [2021-12-17 02:49:57,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:49:57,856 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 81 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:57,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 1660 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:57,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-12-17 02:49:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 417. [2021-12-17 02:49:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 369 states have (on average 1.2574525745257452) internal successors, (464), 373 states have internal predecessors, (464), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (41), 29 states have call predecessors, (41), 28 states have call successors, (41) [2021-12-17 02:49:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 537 transitions. [2021-12-17 02:49:57,878 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 537 transitions. Word has length 51 [2021-12-17 02:49:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:57,878 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 537 transitions. [2021-12-17 02:49:57,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 537 transitions. [2021-12-17 02:49:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 02:49:57,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:57,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:57,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 02:49:57,880 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1011871155, now seen corresponding path program 1 times [2021-12-17 02:49:57,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:57,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81859132] [2021-12-17 02:49:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:57,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:57,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 02:49:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:57,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:57,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81859132] [2021-12-17 02:49:57,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81859132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:57,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:57,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:49:57,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752311150] [2021-12-17 02:49:57,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:57,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:49:57,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:49:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:49:57,942 INFO L87 Difference]: Start difference. First operand 417 states and 537 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:58,226 INFO L93 Difference]: Finished difference Result 438 states and 559 transitions. [2021-12-17 02:49:58,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:49:58,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-17 02:49:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:58,229 INFO L225 Difference]: With dead ends: 438 [2021-12-17 02:49:58,229 INFO L226 Difference]: Without dead ends: 419 [2021-12-17 02:49:58,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:49:58,230 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 82 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:58,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1833 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:58,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-17 02:49:58,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 413. [2021-12-17 02:49:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 366 states have (on average 1.2568306010928962) internal successors, (460), 370 states have internal predecessors, (460), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (40), 28 states have call predecessors, (40), 27 states have call successors, (40) [2021-12-17 02:49:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 531 transitions. [2021-12-17 02:49:58,252 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 531 transitions. Word has length 51 [2021-12-17 02:49:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:58,252 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 531 transitions. [2021-12-17 02:49:58,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 531 transitions. [2021-12-17 02:49:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 02:49:58,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:58,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:58,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 02:49:58,254 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:58,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1800703409, now seen corresponding path program 1 times [2021-12-17 02:49:58,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:58,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351899767] [2021-12-17 02:49:58,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:58,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:58,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 02:49:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:58,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351899767] [2021-12-17 02:49:58,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351899767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:58,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:58,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:49:58,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403917034] [2021-12-17 02:49:58,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:58,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:49:58,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:58,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:49:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:49:58,313 INFO L87 Difference]: Start difference. First operand 413 states and 531 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:58,627 INFO L93 Difference]: Finished difference Result 434 states and 553 transitions. [2021-12-17 02:49:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:49:58,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-17 02:49:58,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:58,630 INFO L225 Difference]: With dead ends: 434 [2021-12-17 02:49:58,630 INFO L226 Difference]: Without dead ends: 414 [2021-12-17 02:49:58,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:49:58,630 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 82 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:58,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1859 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:49:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-12-17 02:49:58,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 408. [2021-12-17 02:49:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 362 states have (on average 1.2569060773480663) internal successors, (455), 366 states have internal predecessors, (455), 30 states have call successors, (30), 15 states have call predecessors, (30), 15 states have return successors, (39), 27 states have call predecessors, (39), 26 states have call successors, (39) [2021-12-17 02:49:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 524 transitions. [2021-12-17 02:49:58,652 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 524 transitions. Word has length 52 [2021-12-17 02:49:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:58,653 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 524 transitions. [2021-12-17 02:49:58,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 524 transitions. [2021-12-17 02:49:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 02:49:58,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:58,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:58,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 02:49:58,655 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1557824811, now seen corresponding path program 1 times [2021-12-17 02:49:58,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:58,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033497435] [2021-12-17 02:49:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:58,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:58,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 02:49:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:58,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:58,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033497435] [2021-12-17 02:49:58,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033497435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:58,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:58,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:49:58,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593437282] [2021-12-17 02:49:58,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:58,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:49:58,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:49:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:49:58,710 INFO L87 Difference]: Start difference. First operand 408 states and 524 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:59,029 INFO L93 Difference]: Finished difference Result 429 states and 546 transitions. [2021-12-17 02:49:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:49:59,030 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-17 02:49:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:59,031 INFO L225 Difference]: With dead ends: 429 [2021-12-17 02:49:59,032 INFO L226 Difference]: Without dead ends: 410 [2021-12-17 02:49:59,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:49:59,032 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 82 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:59,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1749 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:49:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-12-17 02:49:59,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 404. [2021-12-17 02:49:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 359 states have (on average 1.256267409470752) internal successors, (451), 363 states have internal predecessors, (451), 29 states have call successors, (29), 15 states have call predecessors, (29), 15 states have return successors, (38), 26 states have call predecessors, (38), 25 states have call successors, (38) [2021-12-17 02:49:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 518 transitions. [2021-12-17 02:49:59,054 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 518 transitions. Word has length 52 [2021-12-17 02:49:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:59,054 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 518 transitions. [2021-12-17 02:49:59,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 518 transitions. [2021-12-17 02:49:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 02:49:59,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:59,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:59,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 02:49:59,056 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:59,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1863063646, now seen corresponding path program 1 times [2021-12-17 02:49:59,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:59,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062140153] [2021-12-17 02:49:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:59,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:49:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:59,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:59,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062140153] [2021-12-17 02:49:59,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062140153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:59,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:59,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:49:59,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440318666] [2021-12-17 02:49:59,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:59,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:49:59,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:59,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:49:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:49:59,117 INFO L87 Difference]: Start difference. First operand 404 states and 518 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:59,358 INFO L93 Difference]: Finished difference Result 421 states and 535 transitions. [2021-12-17 02:49:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:49:59,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-17 02:49:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:59,360 INFO L225 Difference]: With dead ends: 421 [2021-12-17 02:49:59,361 INFO L226 Difference]: Without dead ends: 388 [2021-12-17 02:49:59,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:49:59,361 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 72 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:59,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1593 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-12-17 02:49:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 382. [2021-12-17 02:49:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 338 states have (on average 1.2603550295857988) internal successors, (426), 342 states have internal predecessors, (426), 28 states have call successors, (28), 15 states have call predecessors, (28), 15 states have return successors, (37), 25 states have call predecessors, (37), 24 states have call successors, (37) [2021-12-17 02:49:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 491 transitions. [2021-12-17 02:49:59,382 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 491 transitions. Word has length 52 [2021-12-17 02:49:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:59,383 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 491 transitions. [2021-12-17 02:49:59,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 491 transitions. [2021-12-17 02:49:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 02:49:59,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:59,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:59,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 02:49:59,385 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:59,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1043047530, now seen corresponding path program 1 times [2021-12-17 02:49:59,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:59,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124938933] [2021-12-17 02:49:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:59,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:59,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:49:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:59,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:59,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124938933] [2021-12-17 02:49:59,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124938933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:59,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:59,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:49:59,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255905597] [2021-12-17 02:49:59,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:59,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:49:59,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:59,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:49:59,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:49:59,461 INFO L87 Difference]: Start difference. First operand 382 states and 491 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:59,695 INFO L93 Difference]: Finished difference Result 724 states and 945 transitions. [2021-12-17 02:49:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:49:59,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-17 02:49:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:59,698 INFO L225 Difference]: With dead ends: 724 [2021-12-17 02:49:59,698 INFO L226 Difference]: Without dead ends: 514 [2021-12-17 02:49:59,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:49:59,699 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 133 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:59,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 1682 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:49:59,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-17 02:49:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 382. [2021-12-17 02:49:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 338 states have (on average 1.257396449704142) internal successors, (425), 342 states have internal predecessors, (425), 28 states have call successors, (28), 15 states have call predecessors, (28), 15 states have return successors, (37), 25 states have call predecessors, (37), 24 states have call successors, (37) [2021-12-17 02:49:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 490 transitions. [2021-12-17 02:49:59,728 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 490 transitions. Word has length 54 [2021-12-17 02:49:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:59,729 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 490 transitions. [2021-12-17 02:49:59,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:49:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 490 transitions. [2021-12-17 02:49:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 02:49:59,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:59,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:59,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 02:49:59,731 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:59,732 INFO L85 PathProgramCache]: Analyzing trace with hash 843934500, now seen corresponding path program 1 times [2021-12-17 02:49:59,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:49:59,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392905186] [2021-12-17 02:49:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:49:59,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:49:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:59,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 02:49:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:49:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:59,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:49:59,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392905186] [2021-12-17 02:49:59,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392905186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:49:59,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:49:59,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:49:59,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022352081] [2021-12-17 02:49:59,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:49:59,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:49:59,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:49:59,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:49:59,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:49:59,792 INFO L87 Difference]: Start difference. First operand 382 states and 490 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:50:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:00,091 INFO L93 Difference]: Finished difference Result 403 states and 512 transitions. [2021-12-17 02:50:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:50:00,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-17 02:50:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:00,094 INFO L225 Difference]: With dead ends: 403 [2021-12-17 02:50:00,094 INFO L226 Difference]: Without dead ends: 366 [2021-12-17 02:50:00,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:50:00,103 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 90 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:00,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1547 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:50:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-17 02:50:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 360. [2021-12-17 02:50:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 319 states have (on average 1.2570532915360502) internal successors, (401), 323 states have internal predecessors, (401), 26 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) [2021-12-17 02:50:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 462 transitions. [2021-12-17 02:50:00,128 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 462 transitions. Word has length 56 [2021-12-17 02:50:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:00,129 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 462 transitions. [2021-12-17 02:50:00,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:50:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 462 transitions. [2021-12-17 02:50:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 02:50:00,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:00,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:00,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 02:50:00,131 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1757413827, now seen corresponding path program 1 times [2021-12-17 02:50:00,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:00,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495700790] [2021-12-17 02:50:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:00,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:00,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 02:50:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:00,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:00,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:00,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495700790] [2021-12-17 02:50:00,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495700790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:00,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:00,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:50:00,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529626289] [2021-12-17 02:50:00,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:00,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:50:00,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:00,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:50:00,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:50:00,189 INFO L87 Difference]: Start difference. First operand 360 states and 462 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:50:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:00,421 INFO L93 Difference]: Finished difference Result 572 states and 729 transitions. [2021-12-17 02:50:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:50:00,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2021-12-17 02:50:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:00,423 INFO L225 Difference]: With dead ends: 572 [2021-12-17 02:50:00,424 INFO L226 Difference]: Without dead ends: 341 [2021-12-17 02:50:00,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:50:00,425 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 190 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:00,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1057 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:50:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-17 02:50:00,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 327. [2021-12-17 02:50:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 291 states have (on average 1.2577319587628866) internal successors, (366), 294 states have internal predecessors, (366), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (23), 20 states have call predecessors, (23), 20 states have call successors, (23) [2021-12-17 02:50:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 412 transitions. [2021-12-17 02:50:00,443 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 412 transitions. Word has length 62 [2021-12-17 02:50:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:00,444 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 412 transitions. [2021-12-17 02:50:00,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:50:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 412 transitions. [2021-12-17 02:50:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 02:50:00,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:00,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:00,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 02:50:00,445 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:00,446 INFO L85 PathProgramCache]: Analyzing trace with hash 282061023, now seen corresponding path program 1 times [2021-12-17 02:50:00,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:00,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570831105] [2021-12-17 02:50:00,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:00,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:00,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 02:50:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:00,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:00,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:00,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570831105] [2021-12-17 02:50:00,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570831105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:00,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:00,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:50:00,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253677681] [2021-12-17 02:50:00,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:00,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:50:00,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:00,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:50:00,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:50:00,536 INFO L87 Difference]: Start difference. First operand 327 states and 412 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 7 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:50:00,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:00,861 INFO L93 Difference]: Finished difference Result 374 states and 469 transitions. [2021-12-17 02:50:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:50:00,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 7 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2021-12-17 02:50:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:00,863 INFO L225 Difference]: With dead ends: 374 [2021-12-17 02:50:00,863 INFO L226 Difference]: Without dead ends: 355 [2021-12-17 02:50:00,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:50:00,864 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 290 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:00,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 1487 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:50:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-17 02:50:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 335. [2021-12-17 02:50:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 298 states have (on average 1.2516778523489933) internal successors, (373), 301 states have internal predecessors, (373), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (26), 21 states have call predecessors, (26), 20 states have call successors, (26) [2021-12-17 02:50:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 422 transitions. [2021-12-17 02:50:00,884 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 422 transitions. Word has length 66 [2021-12-17 02:50:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:00,884 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 422 transitions. [2021-12-17 02:50:00,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 7 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:50:00,885 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 422 transitions. [2021-12-17 02:50:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 02:50:00,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:00,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:00,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 02:50:00,886 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1597986012, now seen corresponding path program 1 times [2021-12-17 02:50:00,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:00,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340861524] [2021-12-17 02:50:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:00,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:00,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:50:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:00,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 02:50:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:00,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 02:50:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:00,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:00,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340861524] [2021-12-17 02:50:00,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340861524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:00,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:00,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:50:00,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110902442] [2021-12-17 02:50:00,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:00,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:50:00,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:00,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:50:00,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:50:00,946 INFO L87 Difference]: Start difference. First operand 335 states and 422 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:01,303 INFO L93 Difference]: Finished difference Result 698 states and 856 transitions. [2021-12-17 02:50:01,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:50:01,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2021-12-17 02:50:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:01,305 INFO L225 Difference]: With dead ends: 698 [2021-12-17 02:50:01,305 INFO L226 Difference]: Without dead ends: 454 [2021-12-17 02:50:01,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:50:01,306 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 539 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:01,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 1062 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:50:01,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-17 02:50:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 429. [2021-12-17 02:50:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 382 states have (on average 1.2408376963350785) internal successors, (474), 387 states have internal predecessors, (474), 25 states have call successors, (25), 19 states have call predecessors, (25), 21 states have return successors, (28), 23 states have call predecessors, (28), 22 states have call successors, (28) [2021-12-17 02:50:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 527 transitions. [2021-12-17 02:50:01,332 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 527 transitions. Word has length 68 [2021-12-17 02:50:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:01,332 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 527 transitions. [2021-12-17 02:50:01,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 527 transitions. [2021-12-17 02:50:01,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 02:50:01,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:01,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:01,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-17 02:50:01,334 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:01,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:01,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2100257904, now seen corresponding path program 1 times [2021-12-17 02:50:01,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:01,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27922040] [2021-12-17 02:50:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:01,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:01,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 02:50:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:01,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 02:50:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:01,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:01,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27922040] [2021-12-17 02:50:01,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27922040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:01,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:01,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:50:01,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509534488] [2021-12-17 02:50:01,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:01,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:50:01,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:01,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:50:01,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:50:01,402 INFO L87 Difference]: Start difference. First operand 429 states and 527 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:50:01,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:01,655 INFO L93 Difference]: Finished difference Result 462 states and 562 transitions. [2021-12-17 02:50:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:50:01,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2021-12-17 02:50:01,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:01,657 INFO L225 Difference]: With dead ends: 462 [2021-12-17 02:50:01,657 INFO L226 Difference]: Without dead ends: 443 [2021-12-17 02:50:01,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:50:01,658 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 91 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:01,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1761 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:50:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-17 02:50:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 421. [2021-12-17 02:50:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 375 states have (on average 1.2426666666666666) internal successors, (466), 380 states have internal predecessors, (466), 25 states have call successors, (25), 19 states have call predecessors, (25), 20 states have return successors, (26), 22 states have call predecessors, (26), 22 states have call successors, (26) [2021-12-17 02:50:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 517 transitions. [2021-12-17 02:50:01,686 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 517 transitions. Word has length 67 [2021-12-17 02:50:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:01,686 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 517 transitions. [2021-12-17 02:50:01,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:50:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 517 transitions. [2021-12-17 02:50:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 02:50:01,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:01,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:01,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-17 02:50:01,688 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:01,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:01,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1162614473, now seen corresponding path program 1 times [2021-12-17 02:50:01,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:01,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090856191] [2021-12-17 02:50:01,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:01,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:01,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:50:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:01,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 02:50:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:01,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 02:50:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:01,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:01,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090856191] [2021-12-17 02:50:01,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090856191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:01,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:01,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 02:50:01,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663769883] [2021-12-17 02:50:01,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:01,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 02:50:01,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:01,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 02:50:01,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:50:01,768 INFO L87 Difference]: Start difference. First operand 421 states and 517 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:50:02,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:02,198 INFO L93 Difference]: Finished difference Result 423 states and 518 transitions. [2021-12-17 02:50:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:50:02,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 69 [2021-12-17 02:50:02,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:02,200 INFO L225 Difference]: With dead ends: 423 [2021-12-17 02:50:02,200 INFO L226 Difference]: Without dead ends: 346 [2021-12-17 02:50:02,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:50:02,201 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 193 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:02,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1429 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 02:50:02,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-17 02:50:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2021-12-17 02:50:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 307 states have (on average 1.247557003257329) internal successors, (383), 311 states have internal predecessors, (383), 21 states have call successors, (21), 16 states have call predecessors, (21), 17 states have return successors, (23), 19 states have call predecessors, (23), 19 states have call successors, (23) [2021-12-17 02:50:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 427 transitions. [2021-12-17 02:50:02,221 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 427 transitions. Word has length 69 [2021-12-17 02:50:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:02,222 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 427 transitions. [2021-12-17 02:50:02,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:50:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 427 transitions. [2021-12-17 02:50:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 02:50:02,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:02,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:02,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-17 02:50:02,224 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:02,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:02,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2112644440, now seen corresponding path program 1 times [2021-12-17 02:50:02,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:02,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567762673] [2021-12-17 02:50:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:02,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:02,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:50:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:02,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 02:50:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:02,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:02,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567762673] [2021-12-17 02:50:02,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567762673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:02,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:02,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:50:02,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490543406] [2021-12-17 02:50:02,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:02,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:50:02,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:50:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:50:02,288 INFO L87 Difference]: Start difference. First operand 346 states and 427 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:50:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:02,445 INFO L93 Difference]: Finished difference Result 504 states and 620 transitions. [2021-12-17 02:50:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:50:02,445 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2021-12-17 02:50:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:02,453 INFO L225 Difference]: With dead ends: 504 [2021-12-17 02:50:02,453 INFO L226 Difference]: Without dead ends: 373 [2021-12-17 02:50:02,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:50:02,454 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 106 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:02,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1112 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:50:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-12-17 02:50:02,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 357. [2021-12-17 02:50:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 317 states have (on average 1.22397476340694) internal successors, (388), 322 states have internal predecessors, (388), 22 states have call successors, (22), 16 states have call predecessors, (22), 17 states have return successors, (23), 19 states have call predecessors, (23), 19 states have call successors, (23) [2021-12-17 02:50:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 433 transitions. [2021-12-17 02:50:02,473 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 433 transitions. Word has length 71 [2021-12-17 02:50:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:02,473 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 433 transitions. [2021-12-17 02:50:02,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:50:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 433 transitions. [2021-12-17 02:50:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 02:50:02,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:02,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:02,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-17 02:50:02,475 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:02,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:02,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1723775457, now seen corresponding path program 1 times [2021-12-17 02:50:02,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:02,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024349283] [2021-12-17 02:50:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:02,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:02,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:50:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:02,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 02:50:02,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:02,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024349283] [2021-12-17 02:50:02,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024349283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:02,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:02,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:50:02,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133671825] [2021-12-17 02:50:02,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:02,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:50:02,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:02,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:50:02,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:50:02,544 INFO L87 Difference]: Start difference. First operand 357 states and 433 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:50:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:02,675 INFO L93 Difference]: Finished difference Result 456 states and 556 transitions. [2021-12-17 02:50:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:50:02,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2021-12-17 02:50:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:02,678 INFO L225 Difference]: With dead ends: 456 [2021-12-17 02:50:02,678 INFO L226 Difference]: Without dead ends: 392 [2021-12-17 02:50:02,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:50:02,678 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 77 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:02,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1229 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:50:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-12-17 02:50:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 265. [2021-12-17 02:50:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 234 states have (on average 1.1794871794871795) internal successors, (276), 238 states have internal predecessors, (276), 16 states have call successors, (16), 12 states have call predecessors, (16), 14 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2021-12-17 02:50:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 311 transitions. [2021-12-17 02:50:02,695 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 311 transitions. Word has length 74 [2021-12-17 02:50:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:02,696 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 311 transitions. [2021-12-17 02:50:02,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:50:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 311 transitions. [2021-12-17 02:50:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 02:50:02,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:02,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:02,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-17 02:50:02,697 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:02,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:02,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1573659208, now seen corresponding path program 1 times [2021-12-17 02:50:02,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:02,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361462942] [2021-12-17 02:50:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:02,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:02,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 02:50:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:02,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:02,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 02:50:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:02,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:02,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361462942] [2021-12-17 02:50:02,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361462942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:02,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:02,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:50:02,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467305826] [2021-12-17 02:50:02,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:02,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:50:02,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:02,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:50:02,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:50:02,773 INFO L87 Difference]: Start difference. First operand 265 states and 311 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:03,062 INFO L93 Difference]: Finished difference Result 497 states and 582 transitions. [2021-12-17 02:50:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:50:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2021-12-17 02:50:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:03,064 INFO L225 Difference]: With dead ends: 497 [2021-12-17 02:50:03,064 INFO L226 Difference]: Without dead ends: 444 [2021-12-17 02:50:03,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:50:03,064 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 370 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:03,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1265 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:50:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-17 02:50:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 191. [2021-12-17 02:50:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 171 states have (on average 1.1578947368421053) internal successors, (198), 173 states have internal predecessors, (198), 9 states have call successors, (9), 9 states have call predecessors, (9), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-17 02:50:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 217 transitions. [2021-12-17 02:50:03,079 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 217 transitions. Word has length 77 [2021-12-17 02:50:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:03,079 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 217 transitions. [2021-12-17 02:50:03,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 217 transitions. [2021-12-17 02:50:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 02:50:03,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:03,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:03,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-17 02:50:03,081 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1441970232, now seen corresponding path program 1 times [2021-12-17 02:50:03,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:03,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631927413] [2021-12-17 02:50:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:03,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:50:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 02:50:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:03,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:03,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631927413] [2021-12-17 02:50:03,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631927413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:03,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:03,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:50:03,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272874508] [2021-12-17 02:50:03,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:03,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:50:03,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:03,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:50:03,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:50:03,126 INFO L87 Difference]: Start difference. First operand 191 states and 217 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:50:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:03,209 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2021-12-17 02:50:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:50:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2021-12-17 02:50:03,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:03,211 INFO L225 Difference]: With dead ends: 256 [2021-12-17 02:50:03,211 INFO L226 Difference]: Without dead ends: 197 [2021-12-17 02:50:03,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:50:03,211 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 25 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:03,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 611 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:50:03,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-17 02:50:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 191. [2021-12-17 02:50:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 171 states have (on average 1.152046783625731) internal successors, (197), 173 states have internal predecessors, (197), 9 states have call successors, (9), 9 states have call predecessors, (9), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-17 02:50:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2021-12-17 02:50:03,225 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 83 [2021-12-17 02:50:03,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:03,226 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2021-12-17 02:50:03,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:50:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2021-12-17 02:50:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 02:50:03,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:03,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:03,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-17 02:50:03,227 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:03,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1573344441, now seen corresponding path program 1 times [2021-12-17 02:50:03,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:03,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710370342] [2021-12-17 02:50:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:03,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:50:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 02:50:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 02:50:03,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:03,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710370342] [2021-12-17 02:50:03,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710370342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:03,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:03,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:50:03,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820144413] [2021-12-17 02:50:03,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:03,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:50:03,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:50:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:50:03,289 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:03,371 INFO L93 Difference]: Finished difference Result 247 states and 277 transitions. [2021-12-17 02:50:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:50:03,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2021-12-17 02:50:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:03,372 INFO L225 Difference]: With dead ends: 247 [2021-12-17 02:50:03,372 INFO L226 Difference]: Without dead ends: 221 [2021-12-17 02:50:03,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:50:03,374 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 47 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:03,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 687 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:50:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-17 02:50:03,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 193. [2021-12-17 02:50:03,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 173 states have (on average 1.1502890173410405) internal successors, (199), 175 states have internal predecessors, (199), 9 states have call successors, (9), 9 states have call predecessors, (9), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-17 02:50:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 218 transitions. [2021-12-17 02:50:03,384 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 218 transitions. Word has length 103 [2021-12-17 02:50:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:03,384 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 218 transitions. [2021-12-17 02:50:03,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 218 transitions. [2021-12-17 02:50:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 02:50:03,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:03,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:03,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-17 02:50:03,385 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash -696614137, now seen corresponding path program 1 times [2021-12-17 02:50:03,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:03,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995063773] [2021-12-17 02:50:03,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:03,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:50:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 02:50:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 02:50:03,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:03,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995063773] [2021-12-17 02:50:03,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995063773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:03,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:03,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:50:03,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574593246] [2021-12-17 02:50:03,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:03,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:50:03,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:03,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:50:03,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:50:03,472 INFO L87 Difference]: Start difference. First operand 193 states and 218 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 8 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:03,655 INFO L93 Difference]: Finished difference Result 233 states and 264 transitions. [2021-12-17 02:50:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:50:03,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 8 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2021-12-17 02:50:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:03,656 INFO L225 Difference]: With dead ends: 233 [2021-12-17 02:50:03,656 INFO L226 Difference]: Without dead ends: 197 [2021-12-17 02:50:03,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:50:03,657 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 303 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:03,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 845 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:50:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-17 02:50:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 191. [2021-12-17 02:50:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 173 states have internal predecessors, (195), 9 states have call successors, (9), 9 states have call predecessors, (9), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-17 02:50:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2021-12-17 02:50:03,670 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 103 [2021-12-17 02:50:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:03,671 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2021-12-17 02:50:03,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 8 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2021-12-17 02:50:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 02:50:03,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:03,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:03,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-17 02:50:03,672 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash 561522837, now seen corresponding path program 1 times [2021-12-17 02:50:03,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:03,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487732739] [2021-12-17 02:50:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:03,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:50:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 02:50:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 02:50:03,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:03,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487732739] [2021-12-17 02:50:03,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487732739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:03,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:03,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-17 02:50:03,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424452751] [2021-12-17 02:50:03,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:03,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 02:50:03,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:03,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 02:50:03,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:50:03,798 INFO L87 Difference]: Start difference. First operand 191 states and 214 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 11 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:04,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:04,128 INFO L93 Difference]: Finished difference Result 299 states and 343 transitions. [2021-12-17 02:50:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 02:50:04,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 11 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 104 [2021-12-17 02:50:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:04,129 INFO L225 Difference]: With dead ends: 299 [2021-12-17 02:50:04,130 INFO L226 Difference]: Without dead ends: 265 [2021-12-17 02:50:04,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-12-17 02:50:04,130 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 481 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:04,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 1471 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:50:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-17 02:50:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 206. [2021-12-17 02:50:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 185 states have (on average 1.145945945945946) internal successors, (212), 187 states have internal predecessors, (212), 9 states have call successors, (9), 9 states have call predecessors, (9), 11 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2021-12-17 02:50:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 232 transitions. [2021-12-17 02:50:04,143 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 232 transitions. Word has length 104 [2021-12-17 02:50:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:04,144 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 232 transitions. [2021-12-17 02:50:04,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 11 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 232 transitions. [2021-12-17 02:50:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 02:50:04,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:04,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:04,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-17 02:50:04,145 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1183080786, now seen corresponding path program 1 times [2021-12-17 02:50:04,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:04,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322598145] [2021-12-17 02:50:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:04,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:50:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 02:50:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 02:50:04,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:04,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322598145] [2021-12-17 02:50:04,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322598145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:04,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:04,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-17 02:50:04,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129691841] [2021-12-17 02:50:04,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:04,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 02:50:04,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:04,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 02:50:04,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:50:04,272 INFO L87 Difference]: Start difference. First operand 206 states and 232 transitions. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:04,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:04,459 INFO L93 Difference]: Finished difference Result 280 states and 318 transitions. [2021-12-17 02:50:04,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:50:04,460 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2021-12-17 02:50:04,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:04,460 INFO L225 Difference]: With dead ends: 280 [2021-12-17 02:50:04,461 INFO L226 Difference]: Without dead ends: 220 [2021-12-17 02:50:04,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:50:04,461 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 50 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:04,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1626 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:50:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-17 02:50:04,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 206. [2021-12-17 02:50:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 185 states have (on average 1.1405405405405404) internal successors, (211), 187 states have internal predecessors, (211), 9 states have call successors, (9), 9 states have call predecessors, (9), 11 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2021-12-17 02:50:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 231 transitions. [2021-12-17 02:50:04,474 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 231 transitions. Word has length 105 [2021-12-17 02:50:04,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:04,475 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 231 transitions. [2021-12-17 02:50:04,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 231 transitions. [2021-12-17 02:50:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 02:50:04,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:04,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:04,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-17 02:50:04,476 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1392028993, now seen corresponding path program 1 times [2021-12-17 02:50:04,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:04,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431546619] [2021-12-17 02:50:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:04,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:50:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 02:50:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 02:50:04,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:04,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431546619] [2021-12-17 02:50:04,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431546619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:04,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:04,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:50:04,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240167286] [2021-12-17 02:50:04,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:04,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:50:04,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:04,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:50:04,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:50:04,551 INFO L87 Difference]: Start difference. First operand 206 states and 231 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:04,625 INFO L93 Difference]: Finished difference Result 258 states and 288 transitions. [2021-12-17 02:50:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:50:04,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 108 [2021-12-17 02:50:04,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:04,626 INFO L225 Difference]: With dead ends: 258 [2021-12-17 02:50:04,626 INFO L226 Difference]: Without dead ends: 198 [2021-12-17 02:50:04,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:50:04,626 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 169 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:04,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 300 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:50:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-17 02:50:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 184. [2021-12-17 02:50:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 164 states have (on average 1.1219512195121952) internal successors, (184), 166 states have internal predecessors, (184), 9 states have call successors, (9), 9 states have call predecessors, (9), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-17 02:50:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 203 transitions. [2021-12-17 02:50:04,639 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 203 transitions. Word has length 108 [2021-12-17 02:50:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:04,640 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 203 transitions. [2021-12-17 02:50:04,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:50:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 203 transitions. [2021-12-17 02:50:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 02:50:04,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:04,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:04,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-17 02:50:04,641 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:04,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:04,642 INFO L85 PathProgramCache]: Analyzing trace with hash 171236406, now seen corresponding path program 1 times [2021-12-17 02:50:04,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:04,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519230973] [2021-12-17 02:50:04,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:04,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:50:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 02:50:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 02:50:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 02:50:04,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:04,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519230973] [2021-12-17 02:50:04,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519230973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:04,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:04,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:50:04,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844406556] [2021-12-17 02:50:04,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:04,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:50:04,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:04,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:50:04,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:50:04,730 INFO L87 Difference]: Start difference. First operand 184 states and 203 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:50:04,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:04,835 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2021-12-17 02:50:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:50:04,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 114 [2021-12-17 02:50:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:04,836 INFO L225 Difference]: With dead ends: 238 [2021-12-17 02:50:04,836 INFO L226 Difference]: Without dead ends: 163 [2021-12-17 02:50:04,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:50:04,837 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 46 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:04,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 839 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:50:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-17 02:50:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-12-17 02:50:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 146 states have (on average 1.1095890410958904) internal successors, (162), 147 states have internal predecessors, (162), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-17 02:50:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 178 transitions. [2021-12-17 02:50:04,847 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 178 transitions. Word has length 114 [2021-12-17 02:50:04,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:04,847 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 178 transitions. [2021-12-17 02:50:04,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:50:04,847 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 178 transitions. [2021-12-17 02:50:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-17 02:50:04,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:04,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:04,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-17 02:50:04,848 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2140745716, now seen corresponding path program 1 times [2021-12-17 02:50:04,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:04,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588874101] [2021-12-17 02:50:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:04,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:50:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 02:50:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 02:50:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 02:50:04,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:04,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588874101] [2021-12-17 02:50:04,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588874101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:04,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:04,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:50:04,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766439137] [2021-12-17 02:50:04,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:04,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:50:04,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:50:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:50:04,928 INFO L87 Difference]: Start difference. First operand 163 states and 178 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:50:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:05,167 INFO L93 Difference]: Finished difference Result 334 states and 366 transitions. [2021-12-17 02:50:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:50:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 115 [2021-12-17 02:50:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:05,169 INFO L225 Difference]: With dead ends: 334 [2021-12-17 02:50:05,169 INFO L226 Difference]: Without dead ends: 163 [2021-12-17 02:50:05,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:50:05,170 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 130 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:05,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 913 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:50:05,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-17 02:50:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-12-17 02:50:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 146 states have (on average 1.1027397260273972) internal successors, (161), 147 states have internal predecessors, (161), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-17 02:50:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 177 transitions. [2021-12-17 02:50:05,184 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 177 transitions. Word has length 115 [2021-12-17 02:50:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:05,184 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 177 transitions. [2021-12-17 02:50:05,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:50:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 177 transitions. [2021-12-17 02:50:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-17 02:50:05,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:05,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:05,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-17 02:50:05,186 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:05,187 INFO L85 PathProgramCache]: Analyzing trace with hash 493382774, now seen corresponding path program 1 times [2021-12-17 02:50:05,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:50:05,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127409825] [2021-12-17 02:50:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:50:05,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:50:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:05,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 02:50:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:05,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 02:50:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:05,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 02:50:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:05,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 02:50:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:50:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 02:50:05,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:50:05,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127409825] [2021-12-17 02:50:05,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127409825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:50:05,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:50:05,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 02:50:05,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640076949] [2021-12-17 02:50:05,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:50:05,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 02:50:05,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:50:05,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 02:50:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:50:05,316 INFO L87 Difference]: Start difference. First operand 163 states and 177 transitions. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 10 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:50:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:05,621 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2021-12-17 02:50:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 02:50:05,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 10 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 115 [2021-12-17 02:50:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:05,622 INFO L225 Difference]: With dead ends: 176 [2021-12-17 02:50:05,622 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 02:50:05,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-12-17 02:50:05,623 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 379 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:05,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 743 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:50:05,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 02:50:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 02:50:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:50:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 02:50:05,624 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2021-12-17 02:50:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:05,624 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 02:50:05,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 10 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:50:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 02:50:05,624 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 02:50:05,626 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 02:50:05,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-17 02:50:05,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. Killed by 15