./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.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/diskperf_simpl1.cil.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 48b194ce99c1fa112b5c4d4ed6cc0216b9fbb33f6f6efd57d62e9c27b1f7eb5c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 02:48:25,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 02:48:25,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 02:48:25,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 02:48:25,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 02:48:25,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 02:48:25,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 02:48:25,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 02:48:25,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 02:48:25,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 02:48:25,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 02:48:25,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 02:48:25,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 02:48:25,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 02:48:25,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 02:48:25,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 02:48:25,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 02:48:25,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 02:48:25,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 02:48:25,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 02:48:25,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 02:48:25,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 02:48:25,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 02:48:25,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 02:48:25,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 02:48:25,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 02:48:25,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 02:48:25,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 02:48:25,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 02:48:25,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 02:48:25,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 02:48:25,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 02:48:25,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 02:48:25,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 02:48:25,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 02:48:25,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 02:48:25,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 02:48:25,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 02:48:25,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 02:48:25,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 02:48:25,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 02:48:25,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 02:48:25,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 02:48:25,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 02:48:25,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 02:48:25,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 02:48:25,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 02:48:25,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 02:48:25,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 02:48:25,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 02:48:25,520 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 02:48:25,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 02:48:25,521 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 02:48:25,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 02:48:25,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 02:48:25,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 02:48:25,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 02:48:25,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 02:48:25,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 02:48:25,522 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 02:48:25,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 02:48:25,522 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 02:48:25,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 02:48:25,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 02:48:25,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 02:48:25,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 02:48:25,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:48:25,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 02:48:25,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 02:48:25,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 02:48:25,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 02:48:25,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 02:48:25,525 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 02:48:25,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 02:48:25,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 02:48:25,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 02:48:25,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48b194ce99c1fa112b5c4d4ed6cc0216b9fbb33f6f6efd57d62e9c27b1f7eb5c [2021-12-17 02:48:25,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 02:48:25,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 02:48:25,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 02:48:25,724 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 02:48:25,724 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 02:48:25,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2021-12-17 02:48:25,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e2c68059/1afeeb8c719b4c769827dee79c6d4c07/FLAG304608de0 [2021-12-17 02:48:26,147 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 02:48:26,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2021-12-17 02:48:26,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e2c68059/1afeeb8c719b4c769827dee79c6d4c07/FLAG304608de0 [2021-12-17 02:48:26,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e2c68059/1afeeb8c719b4c769827dee79c6d4c07 [2021-12-17 02:48:26,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 02:48:26,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 02:48:26,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 02:48:26,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 02:48:26,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 02:48:26,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be0fb8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26, skipping insertion in model container [2021-12-17 02:48:26,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 02:48:26,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 02:48:26,333 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/diskperf_simpl1.cil.c[2072,2085] [2021-12-17 02:48:26,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:48:26,439 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 02:48:26,449 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/diskperf_simpl1.cil.c[2072,2085] [2021-12-17 02:48:26,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:48:26,531 INFO L208 MainTranslator]: Completed translation [2021-12-17 02:48:26,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26 WrapperNode [2021-12-17 02:48:26,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 02:48:26,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 02:48:26,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 02:48:26,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 02:48:26,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,595 INFO L137 Inliner]: procedures = 38, calls = 66, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 755 [2021-12-17 02:48:26,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 02:48:26,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 02:48:26,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 02:48:26,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 02:48:26,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 02:48:26,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 02:48:26,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 02:48:26,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 02:48:26,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26" (1/1) ... [2021-12-17 02:48:26,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:48:26,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:48:26,685 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 02:48:26,704 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 02:48:26,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 02:48:26,713 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-17 02:48:26,713 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-17 02:48:26,713 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-17 02:48:26,713 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-17 02:48:26,713 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-17 02:48:26,713 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-17 02:48:26,713 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2021-12-17 02:48:26,714 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2021-12-17 02:48:26,714 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2021-12-17 02:48:26,714 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2021-12-17 02:48:26,714 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-17 02:48:26,714 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-17 02:48:26,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 02:48:26,714 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-17 02:48:26,714 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-17 02:48:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2021-12-17 02:48:26,715 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2021-12-17 02:48:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2021-12-17 02:48:26,715 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2021-12-17 02:48:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 02:48:26,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 02:48:26,840 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 02:48:26,841 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 02:48:26,845 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:48:26,911 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-17 02:48:26,911 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-17 02:48:26,912 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:48:26,932 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-17 02:48:26,932 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-17 02:48:26,960 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:48:26,963 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:48:26,969 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:48:27,179 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !false; [2021-12-17 02:48:27,179 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume false; [2021-12-17 02:48:27,180 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2021-12-17 02:48:27,180 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2021-12-17 02:48:27,180 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##106: assume !false; [2021-12-17 02:48:27,180 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##105: assume false; [2021-12-17 02:48:27,181 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:48:27,198 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-17 02:48:27,198 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-17 02:48:27,231 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 02:48:27,240 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 02:48:27,240 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 02:48:27,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:48:27 BoogieIcfgContainer [2021-12-17 02:48:27,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 02:48:27,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 02:48:27,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 02:48:27,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 02:48:27,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:48:26" (1/3) ... [2021-12-17 02:48:27,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e525f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:48:27, skipping insertion in model container [2021-12-17 02:48:27,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:48:26" (2/3) ... [2021-12-17 02:48:27,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e525f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:48:27, skipping insertion in model container [2021-12-17 02:48:27,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:48:27" (3/3) ... [2021-12-17 02:48:27,249 INFO L111 eAbstractionObserver]: Analyzing ICFG diskperf_simpl1.cil.c [2021-12-17 02:48:27,252 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 02:48:27,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 02:48:27,290 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 02:48:27,294 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 02:48:27,294 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 02:48:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 188 states have (on average 1.4680851063829787) internal successors, (276), 205 states have internal predecessors, (276), 44 states have call successors, (44), 9 states have call predecessors, (44), 9 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-17 02:48:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 02:48:27,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:27,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:48:27,335 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:27,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1911400740, now seen corresponding path program 1 times [2021-12-17 02:48:27,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:27,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418714657] [2021-12-17 02:48:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:27,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:27,480 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 02:48:27,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:27,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418714657] [2021-12-17 02:48:27,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418714657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:27,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:27,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:48:27,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902584175] [2021-12-17 02:48:27,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:27,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:48:27,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:48:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:48:27,513 INFO L87 Difference]: Start difference. First operand has 243 states, 188 states have (on average 1.4680851063829787) internal successors, (276), 205 states have internal predecessors, (276), 44 states have call successors, (44), 9 states have call predecessors, (44), 9 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) 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 02:48:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:27,651 INFO L93 Difference]: Finished difference Result 449 states and 690 transitions. [2021-12-17 02:48:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:48:27,653 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 02:48:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:27,659 INFO L225 Difference]: With dead ends: 449 [2021-12-17 02:48:27,660 INFO L226 Difference]: Without dead ends: 236 [2021-12-17 02:48:27,664 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 02:48:27,666 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 8 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:27,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 635 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-17 02:48:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-12-17 02:48:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 183 states have (on average 1.4098360655737705) internal successors, (258), 198 states have internal predecessors, (258), 44 states have call successors, (44), 9 states have call predecessors, (44), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-17 02:48:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 332 transitions. [2021-12-17 02:48:27,707 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 332 transitions. Word has length 13 [2021-12-17 02:48:27,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:27,708 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 332 transitions. [2021-12-17 02:48:27,708 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 02:48:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 332 transitions. [2021-12-17 02:48:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 02:48:27,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:27,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:48:27,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 02:48:27,709 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:27,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1078790828, now seen corresponding path program 1 times [2021-12-17 02:48:27,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:27,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491465732] [2021-12-17 02:48:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:27,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:27,750 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 02:48:27,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:27,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491465732] [2021-12-17 02:48:27,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491465732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:27,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:27,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:48:27,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114897999] [2021-12-17 02:48:27,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:27,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:48:27,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:27,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:48:27,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:48:27,757 INFO L87 Difference]: Start difference. First operand 236 states and 332 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, (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 02:48:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:27,858 INFO L93 Difference]: Finished difference Result 536 states and 777 transitions. [2021-12-17 02:48:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:48:27,858 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, (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 15 [2021-12-17 02:48:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:27,861 INFO L225 Difference]: With dead ends: 536 [2021-12-17 02:48:27,862 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 02:48:27,863 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 02:48:27,864 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 250 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:27,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 680 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 02:48:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 357. [2021-12-17 02:48:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 283 states have (on average 1.3851590106007068) internal successors, (392), 291 states have internal predecessors, (392), 59 states have call successors, (59), 16 states have call predecessors, (59), 14 states have return successors, (67), 51 states have call predecessors, (67), 48 states have call successors, (67) [2021-12-17 02:48:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 518 transitions. [2021-12-17 02:48:27,885 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 518 transitions. Word has length 15 [2021-12-17 02:48:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:27,885 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 518 transitions. [2021-12-17 02:48:27,886 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, (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 02:48:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 518 transitions. [2021-12-17 02:48:27,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 02:48:27,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:27,887 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] [2021-12-17 02:48:27,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 02:48:27,889 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:27,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:27,890 INFO L85 PathProgramCache]: Analyzing trace with hash -320586800, now seen corresponding path program 1 times [2021-12-17 02:48:27,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:27,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739750436] [2021-12-17 02:48:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:27,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:27,948 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 02:48:27,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:27,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739750436] [2021-12-17 02:48:27,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739750436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:27,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:27,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:48:27,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474643414] [2021-12-17 02:48:27,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:27,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:48:27,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:27,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:48:27,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:48:27,951 INFO L87 Difference]: Start difference. First operand 357 states and 518 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 02:48:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:27,972 INFO L93 Difference]: Finished difference Result 823 states and 1229 transitions. [2021-12-17 02:48:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:48:27,973 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), 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 20 [2021-12-17 02:48:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:27,976 INFO L225 Difference]: With dead ends: 823 [2021-12-17 02:48:27,979 INFO L226 Difference]: Without dead ends: 550 [2021-12-17 02:48:27,980 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 02:48:27,985 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 255 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:27,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 578 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:48:27,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-12-17 02:48:28,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 519. [2021-12-17 02:48:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 411 states have (on average 1.389294403892944) internal successors, (571), 418 states have internal predecessors, (571), 84 states have call successors, (84), 24 states have call predecessors, (84), 23 states have return successors, (117), 77 states have call predecessors, (117), 74 states have call successors, (117) [2021-12-17 02:48:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 772 transitions. [2021-12-17 02:48:28,022 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 772 transitions. Word has length 20 [2021-12-17 02:48:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:28,023 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 772 transitions. [2021-12-17 02:48:28,023 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), 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 02:48:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 772 transitions. [2021-12-17 02:48:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 02:48:28,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:28,024 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] [2021-12-17 02:48:28,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 02:48:28,025 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:28,025 INFO L85 PathProgramCache]: Analyzing trace with hash -175921138, now seen corresponding path program 1 times [2021-12-17 02:48:28,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:28,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412768392] [2021-12-17 02:48:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:28,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:28,051 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 02:48:28,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:28,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412768392] [2021-12-17 02:48:28,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412768392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:28,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:28,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:48:28,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064472643] [2021-12-17 02:48:28,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:28,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:48:28,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:28,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:48:28,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:48:28,054 INFO L87 Difference]: Start difference. First operand 519 states and 772 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 02:48:28,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:28,103 INFO L93 Difference]: Finished difference Result 534 states and 792 transitions. [2021-12-17 02:48:28,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:48:28,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 24 [2021-12-17 02:48:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:28,106 INFO L225 Difference]: With dead ends: 534 [2021-12-17 02:48:28,106 INFO L226 Difference]: Without dead ends: 530 [2021-12-17 02:48:28,107 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 02:48:28,108 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 21 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:28,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 557 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:48:28,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-12-17 02:48:28,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 529. [2021-12-17 02:48:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 422 states have (on average 1.386255924170616) internal successors, (585), 427 states have internal predecessors, (585), 83 states have call successors, (83), 25 states have call predecessors, (83), 23 states have return successors, (117), 77 states have call predecessors, (117), 74 states have call successors, (117) [2021-12-17 02:48:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 785 transitions. [2021-12-17 02:48:28,123 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 785 transitions. Word has length 24 [2021-12-17 02:48:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:28,123 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 785 transitions. [2021-12-17 02:48:28,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 02:48:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 785 transitions. [2021-12-17 02:48:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 02:48:28,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:28,124 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] [2021-12-17 02:48:28,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 02:48:28,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:28,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:28,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1035800982, now seen corresponding path program 1 times [2021-12-17 02:48:28,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:28,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184745820] [2021-12-17 02:48:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:28,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:28,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:48:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:28,188 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 02:48:28,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:28,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184745820] [2021-12-17 02:48:28,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184745820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:28,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:28,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:48:28,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169470943] [2021-12-17 02:48:28,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:28,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:48:28,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:28,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:48:28,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:48:28,190 INFO L87 Difference]: Start difference. First operand 529 states and 785 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 02:48:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:28,480 INFO L93 Difference]: Finished difference Result 582 states and 861 transitions. [2021-12-17 02:48:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:48:28,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 27 [2021-12-17 02:48:28,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:28,483 INFO L225 Difference]: With dead ends: 582 [2021-12-17 02:48:28,483 INFO L226 Difference]: Without dead ends: 571 [2021-12-17 02:48:28,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:48:28,484 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 410 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:28,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 798 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:28,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-17 02:48:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 556. [2021-12-17 02:48:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 447 states have (on average 1.3803131991051454) internal successors, (617), 454 states have internal predecessors, (617), 83 states have call successors, (83), 25 states have call predecessors, (83), 25 states have return successors, (126), 77 states have call predecessors, (126), 74 states have call successors, (126) [2021-12-17 02:48:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 826 transitions. [2021-12-17 02:48:28,508 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 826 transitions. Word has length 27 [2021-12-17 02:48:28,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:28,508 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 826 transitions. [2021-12-17 02:48:28,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 02:48:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 826 transitions. [2021-12-17 02:48:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 02:48:28,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:28,511 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 02:48:28,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 02:48:28,511 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:28,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:28,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1813713707, now seen corresponding path program 1 times [2021-12-17 02:48:28,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:28,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308261594] [2021-12-17 02:48:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:28,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:28,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:48:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:28,605 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 02:48:28,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308261594] [2021-12-17 02:48:28,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308261594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:28,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:28,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:48:28,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700611677] [2021-12-17 02:48:28,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:28,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:48:28,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:28,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:48:28,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:48:28,608 INFO L87 Difference]: Start difference. First operand 556 states and 826 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 02:48:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:28,866 INFO L93 Difference]: Finished difference Result 579 states and 854 transitions. [2021-12-17 02:48:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:48:28,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 28 [2021-12-17 02:48:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:28,869 INFO L225 Difference]: With dead ends: 579 [2021-12-17 02:48:28,869 INFO L226 Difference]: Without dead ends: 571 [2021-12-17 02:48:28,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:48:28,870 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 408 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:28,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 799 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-17 02:48:28,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 556. [2021-12-17 02:48:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 447 states have (on average 1.378076062639821) internal successors, (616), 454 states have internal predecessors, (616), 83 states have call successors, (83), 25 states have call predecessors, (83), 25 states have return successors, (126), 77 states have call predecessors, (126), 74 states have call successors, (126) [2021-12-17 02:48:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 825 transitions. [2021-12-17 02:48:28,887 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 825 transitions. Word has length 28 [2021-12-17 02:48:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:28,888 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 825 transitions. [2021-12-17 02:48:28,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 02:48:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 825 transitions. [2021-12-17 02:48:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 02:48:28,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:28,889 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] [2021-12-17 02:48:28,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 02:48:28,889 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:28,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash 123360193, now seen corresponding path program 1 times [2021-12-17 02:48:28,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:28,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837335365] [2021-12-17 02:48:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:28,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:28,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:48:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:28,909 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 02:48:28,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837335365] [2021-12-17 02:48:28,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837335365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:28,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:48:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155124160] [2021-12-17 02:48:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:28,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:48:28,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:48:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:48:28,911 INFO L87 Difference]: Start difference. First operand 556 states and 825 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 02:48:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:29,110 INFO L93 Difference]: Finished difference Result 1018 states and 1542 transitions. [2021-12-17 02:48:29,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:48:29,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2021-12-17 02:48:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:29,115 INFO L225 Difference]: With dead ends: 1018 [2021-12-17 02:48:29,115 INFO L226 Difference]: Without dead ends: 989 [2021-12-17 02:48:29,115 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 02:48:29,116 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 417 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:29,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 777 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-12-17 02:48:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 949. [2021-12-17 02:48:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 759 states have (on average 1.391304347826087) internal successors, (1056), 766 states have internal predecessors, (1056), 141 states have call successors, (141), 47 states have call predecessors, (141), 48 states have return successors, (249), 137 states have call predecessors, (249), 132 states have call successors, (249) [2021-12-17 02:48:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1446 transitions. [2021-12-17 02:48:29,146 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1446 transitions. Word has length 29 [2021-12-17 02:48:29,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:29,146 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1446 transitions. [2021-12-17 02:48:29,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 02:48:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1446 transitions. [2021-12-17 02:48:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:48:29,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:29,151 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 02:48:29,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 02:48:29,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:29,153 INFO L85 PathProgramCache]: Analyzing trace with hash -462412845, now seen corresponding path program 1 times [2021-12-17 02:48:29,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:29,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500446249] [2021-12-17 02:48:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:29,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:29,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:48:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:29,188 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 02:48:29,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:29,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500446249] [2021-12-17 02:48:29,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500446249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:29,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:29,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:48:29,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188697046] [2021-12-17 02:48:29,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:29,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:48:29,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:29,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:48:29,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:48:29,190 INFO L87 Difference]: Start difference. First operand 949 states and 1446 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 02:48:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:29,320 INFO L93 Difference]: Finished difference Result 985 states and 1494 transitions. [2021-12-17 02:48:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:48:29,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 30 [2021-12-17 02:48:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:29,324 INFO L225 Difference]: With dead ends: 985 [2021-12-17 02:48:29,324 INFO L226 Difference]: Without dead ends: 966 [2021-12-17 02:48:29,325 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 02:48:29,325 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 84 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:29,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1008 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:29,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-12-17 02:48:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 945. [2021-12-17 02:48:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 756 states have (on average 1.3915343915343916) internal successors, (1052), 763 states have internal predecessors, (1052), 140 states have call successors, (140), 47 states have call predecessors, (140), 48 states have return successors, (248), 136 states have call predecessors, (248), 131 states have call successors, (248) [2021-12-17 02:48:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1440 transitions. [2021-12-17 02:48:29,364 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1440 transitions. Word has length 30 [2021-12-17 02:48:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:29,364 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1440 transitions. [2021-12-17 02:48:29,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 02:48:29,364 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1440 transitions. [2021-12-17 02:48:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 02:48:29,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:29,365 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 02:48:29,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 02:48:29,365 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:29,366 INFO L85 PathProgramCache]: Analyzing trace with hash 415913558, now seen corresponding path program 1 times [2021-12-17 02:48:29,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:29,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180683895] [2021-12-17 02:48:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:29,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:29,396 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 02:48:29,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:29,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180683895] [2021-12-17 02:48:29,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180683895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:29,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:29,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:48:29,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426278379] [2021-12-17 02:48:29,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:29,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:48:29,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:48:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:48:29,398 INFO L87 Difference]: Start difference. First operand 945 states and 1440 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:48:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:29,421 INFO L93 Difference]: Finished difference Result 1334 states and 2062 transitions. [2021-12-17 02:48:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:48:29,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-17 02:48:29,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:29,424 INFO L225 Difference]: With dead ends: 1334 [2021-12-17 02:48:29,424 INFO L226 Difference]: Without dead ends: 510 [2021-12-17 02:48:29,428 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 02:48:29,429 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 264 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:29,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 270 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:48:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-17 02:48:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-12-17 02:48:29,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 408 states have (on average 1.3553921568627452) internal successors, (553), 414 states have internal predecessors, (553), 78 states have call successors, (78), 23 states have call predecessors, (78), 23 states have return successors, (123), 73 states have call predecessors, (123), 71 states have call successors, (123) [2021-12-17 02:48:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 754 transitions. [2021-12-17 02:48:29,453 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 754 transitions. Word has length 34 [2021-12-17 02:48:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:29,453 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 754 transitions. [2021-12-17 02:48:29,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:48:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 754 transitions. [2021-12-17 02:48:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 02:48:29,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:29,455 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 02:48:29,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 02:48:29,456 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2105808494, now seen corresponding path program 1 times [2021-12-17 02:48:29,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:29,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108618808] [2021-12-17 02:48:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:29,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:29,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:48:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:29,505 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 02:48:29,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:29,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108618808] [2021-12-17 02:48:29,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108618808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:29,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:29,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:48:29,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988823828] [2021-12-17 02:48:29,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:29,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:48:29,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:48:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:48:29,507 INFO L87 Difference]: Start difference. First operand 510 states and 754 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 02:48:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:29,628 INFO L93 Difference]: Finished difference Result 553 states and 805 transitions. [2021-12-17 02:48:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:48:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 34 [2021-12-17 02:48:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:29,630 INFO L225 Difference]: With dead ends: 553 [2021-12-17 02:48:29,630 INFO L226 Difference]: Without dead ends: 519 [2021-12-17 02:48:29,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:48:29,631 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 94 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:29,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1179 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-12-17 02:48:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2021-12-17 02:48:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 407 states have (on average 1.3513513513513513) internal successors, (550), 413 states have internal predecessors, (550), 77 states have call successors, (77), 23 states have call predecessors, (77), 23 states have return successors, (122), 72 states have call predecessors, (122), 70 states have call successors, (122) [2021-12-17 02:48:29,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 749 transitions. [2021-12-17 02:48:29,647 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 749 transitions. Word has length 34 [2021-12-17 02:48:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:29,648 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 749 transitions. [2021-12-17 02:48:29,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 02:48:29,648 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 749 transitions. [2021-12-17 02:48:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 02:48:29,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:29,649 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 02:48:29,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 02:48:29,649 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1486754927, now seen corresponding path program 1 times [2021-12-17 02:48:29,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:29,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075420981] [2021-12-17 02:48:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:29,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:29,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 02:48:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:29,681 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 02:48:29,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:29,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075420981] [2021-12-17 02:48:29,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075420981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:29,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:29,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:48:29,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380120271] [2021-12-17 02:48:29,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:29,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:48:29,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:29,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:48:29,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:48:29,684 INFO L87 Difference]: Start difference. First operand 508 states and 749 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 02:48:29,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:29,888 INFO L93 Difference]: Finished difference Result 720 states and 1102 transitions. [2021-12-17 02:48:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:48:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2021-12-17 02:48:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:29,892 INFO L225 Difference]: With dead ends: 720 [2021-12-17 02:48:29,892 INFO L226 Difference]: Without dead ends: 712 [2021-12-17 02:48:29,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 02:48:29,893 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 232 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:29,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 668 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:29,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-12-17 02:48:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 566. [2021-12-17 02:48:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 455 states have (on average 1.3516483516483517) internal successors, (615), 461 states have internal predecessors, (615), 84 states have call successors, (84), 25 states have call predecessors, (84), 26 states have return successors, (142), 80 states have call predecessors, (142), 77 states have call successors, (142) [2021-12-17 02:48:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 841 transitions. [2021-12-17 02:48:29,914 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 841 transitions. Word has length 34 [2021-12-17 02:48:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:29,915 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 841 transitions. [2021-12-17 02:48:29,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 02:48:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 841 transitions. [2021-12-17 02:48:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 02:48:29,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:29,916 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 02:48:29,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 02:48:29,916 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:29,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1608594996, now seen corresponding path program 1 times [2021-12-17 02:48:29,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:29,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253301669] [2021-12-17 02:48:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:29,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:29,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 02:48:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:29,962 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 02:48:29,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:29,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253301669] [2021-12-17 02:48:29,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253301669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:29,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:29,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:48:29,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963544011] [2021-12-17 02:48:29,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:29,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:48:29,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:29,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:48:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:48:29,964 INFO L87 Difference]: Start difference. First operand 566 states and 841 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 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 02:48:30,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:30,214 INFO L93 Difference]: Finished difference Result 583 states and 860 transitions. [2021-12-17 02:48:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:48:30,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 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 02:48:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:30,217 INFO L225 Difference]: With dead ends: 583 [2021-12-17 02:48:30,217 INFO L226 Difference]: Without dead ends: 579 [2021-12-17 02:48:30,218 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 02:48:30,218 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 66 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:30,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1471 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-12-17 02:48:30,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 574. [2021-12-17 02:48:30,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 463 states have (on average 1.349892008639309) internal successors, (625), 469 states have internal predecessors, (625), 84 states have call successors, (84), 25 states have call predecessors, (84), 26 states have return successors, (142), 80 states have call predecessors, (142), 77 states have call successors, (142) [2021-12-17 02:48:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 851 transitions. [2021-12-17 02:48:30,245 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 851 transitions. Word has length 35 [2021-12-17 02:48:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:30,245 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 851 transitions. [2021-12-17 02:48:30,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 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 02:48:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 851 transitions. [2021-12-17 02:48:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 02:48:30,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:30,246 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 02:48:30,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 02:48:30,246 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:30,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1608318166, now seen corresponding path program 1 times [2021-12-17 02:48:30,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:30,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672659326] [2021-12-17 02:48:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:30,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:30,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 02:48:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:30,315 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 02:48:30,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:30,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672659326] [2021-12-17 02:48:30,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672659326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:30,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:30,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:48:30,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160682615] [2021-12-17 02:48:30,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:30,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:48:30,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:48:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:48:30,318 INFO L87 Difference]: Start difference. First operand 574 states and 851 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 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 02:48:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:30,508 INFO L93 Difference]: Finished difference Result 1065 states and 1652 transitions. [2021-12-17 02:48:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:48:30,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 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 02:48:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:30,511 INFO L225 Difference]: With dead ends: 1065 [2021-12-17 02:48:30,511 INFO L226 Difference]: Without dead ends: 605 [2021-12-17 02:48:30,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:48:30,514 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 75 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:30,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1640 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:30,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-12-17 02:48:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 586. [2021-12-17 02:48:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 474 states have (on average 1.3544303797468353) internal successors, (642), 481 states have internal predecessors, (642), 84 states have call successors, (84), 25 states have call predecessors, (84), 27 states have return successors, (161), 80 states have call predecessors, (161), 77 states have call successors, (161) [2021-12-17 02:48:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 887 transitions. [2021-12-17 02:48:30,536 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 887 transitions. Word has length 35 [2021-12-17 02:48:30,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:30,536 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 887 transitions. [2021-12-17 02:48:30,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 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 02:48:30,537 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 887 transitions. [2021-12-17 02:48:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 02:48:30,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:30,538 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 02:48:30,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 02:48:30,538 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:30,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1299938960, now seen corresponding path program 1 times [2021-12-17 02:48:30,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:30,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884759804] [2021-12-17 02:48:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:30,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:30,556 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 02:48:30,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:30,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884759804] [2021-12-17 02:48:30,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884759804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:30,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:30,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:48:30,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034793737] [2021-12-17 02:48:30,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:30,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:48:30,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:30,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:48:30,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:48:30,558 INFO L87 Difference]: Start difference. First operand 586 states and 887 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 02:48:30,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:30,659 INFO L93 Difference]: Finished difference Result 610 states and 910 transitions. [2021-12-17 02:48:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:48:30,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 34 [2021-12-17 02:48:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:30,662 INFO L225 Difference]: With dead ends: 610 [2021-12-17 02:48:30,662 INFO L226 Difference]: Without dead ends: 582 [2021-12-17 02:48:30,662 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 02:48:30,663 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 270 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:30,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 410 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:30,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-12-17 02:48:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 580. [2021-12-17 02:48:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 468 states have (on average 1.3525641025641026) internal successors, (633), 476 states have internal predecessors, (633), 84 states have call successors, (84), 25 states have call predecessors, (84), 27 states have return successors, (159), 79 states have call predecessors, (159), 77 states have call successors, (159) [2021-12-17 02:48:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 876 transitions. [2021-12-17 02:48:30,692 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 876 transitions. Word has length 34 [2021-12-17 02:48:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:30,693 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 876 transitions. [2021-12-17 02:48:30,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 02:48:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 876 transitions. [2021-12-17 02:48:30,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 02:48:30,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:30,694 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] [2021-12-17 02:48:30,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 02:48:30,694 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:30,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1171529217, now seen corresponding path program 1 times [2021-12-17 02:48:30,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:30,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660253166] [2021-12-17 02:48:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:30,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:30,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 02:48:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:30,754 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 02:48:30,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:30,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660253166] [2021-12-17 02:48:30,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660253166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:30,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:30,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:48:30,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377818964] [2021-12-17 02:48:30,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:30,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:48:30,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:30,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:48:30,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:48:30,757 INFO L87 Difference]: Start difference. First operand 580 states and 876 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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 02:48:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:31,128 INFO L93 Difference]: Finished difference Result 738 states and 1149 transitions. [2021-12-17 02:48:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:48:31,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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 36 [2021-12-17 02:48:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:31,133 INFO L225 Difference]: With dead ends: 738 [2021-12-17 02:48:31,133 INFO L226 Difference]: Without dead ends: 721 [2021-12-17 02:48:31,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 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 02:48:31,135 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 662 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:31,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 768 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:48:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-17 02:48:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 567. [2021-12-17 02:48:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 457 states have (on average 1.3544857768052516) internal successors, (619), 464 states have internal predecessors, (619), 83 states have call successors, (83), 25 states have call predecessors, (83), 26 states have return successors, (140), 78 states have call predecessors, (140), 76 states have call successors, (140) [2021-12-17 02:48:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 842 transitions. [2021-12-17 02:48:31,157 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 842 transitions. Word has length 36 [2021-12-17 02:48:31,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:31,157 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 842 transitions. [2021-12-17 02:48:31,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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 02:48:31,158 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 842 transitions. [2021-12-17 02:48:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 02:48:31,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:31,158 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:48:31,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 02:48:31,159 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2056934280, now seen corresponding path program 1 times [2021-12-17 02:48:31,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:31,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448381285] [2021-12-17 02:48:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:31,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:31,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:48:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:31,188 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 02:48:31,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:31,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448381285] [2021-12-17 02:48:31,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448381285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:31,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:31,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:48:31,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633960572] [2021-12-17 02:48:31,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:31,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:48:31,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:31,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:48:31,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:48:31,191 INFO L87 Difference]: Start difference. First operand 567 states and 842 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:48:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:31,361 INFO L93 Difference]: Finished difference Result 630 states and 904 transitions. [2021-12-17 02:48:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:48:31,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 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 02:48:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:31,364 INFO L225 Difference]: With dead ends: 630 [2021-12-17 02:48:31,364 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 02:48:31,365 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 02:48:31,365 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 315 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:31,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 650 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 02:48:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2021-12-17 02:48:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 295 states have (on average 1.3016949152542372) internal successors, (384), 302 states have internal predecessors, (384), 47 states have call successors, (47), 17 states have call predecessors, (47), 16 states have return successors, (61), 40 states have call predecessors, (61), 40 states have call successors, (61) [2021-12-17 02:48:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 492 transitions. [2021-12-17 02:48:31,377 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 492 transitions. Word has length 39 [2021-12-17 02:48:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:31,378 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 492 transitions. [2021-12-17 02:48:31,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:48:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 492 transitions. [2021-12-17 02:48:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 02:48:31,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:31,378 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 02:48:31,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 02:48:31,379 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:31,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:31,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1922765712, now seen corresponding path program 1 times [2021-12-17 02:48:31,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:31,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614788569] [2021-12-17 02:48:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:31,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:31,395 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 02:48:31,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:31,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614788569] [2021-12-17 02:48:31,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614788569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:31,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:31,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:48:31,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186358655] [2021-12-17 02:48:31,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:31,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:48:31,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:31,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:48:31,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:48:31,397 INFO L87 Difference]: Start difference. First operand 359 states and 492 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 02:48:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:31,455 INFO L93 Difference]: Finished difference Result 504 states and 710 transitions. [2021-12-17 02:48:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:48:31,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 35 [2021-12-17 02:48:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:31,457 INFO L225 Difference]: With dead ends: 504 [2021-12-17 02:48:31,458 INFO L226 Difference]: Without dead ends: 491 [2021-12-17 02:48:31,458 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 02:48:31,458 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 161 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:31,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 641 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:48:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-17 02:48:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 375. [2021-12-17 02:48:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 310 states have (on average 1.2903225806451613) internal successors, (400), 317 states have internal predecessors, (400), 47 states have call successors, (47), 17 states have call predecessors, (47), 17 states have return successors, (62), 41 states have call predecessors, (62), 40 states have call successors, (62) [2021-12-17 02:48:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 509 transitions. [2021-12-17 02:48:31,471 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 509 transitions. Word has length 35 [2021-12-17 02:48:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:31,472 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 509 transitions. [2021-12-17 02:48:31,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 02:48:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 509 transitions. [2021-12-17 02:48:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 02:48:31,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:31,472 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 02:48:31,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 02:48:31,473 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:31,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:31,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1798212464, now seen corresponding path program 1 times [2021-12-17 02:48:31,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:31,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423437355] [2021-12-17 02:48:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:31,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:31,497 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 02:48:31,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:31,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423437355] [2021-12-17 02:48:31,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423437355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:31,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:31,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:48:31,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941011541] [2021-12-17 02:48:31,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:31,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:48:31,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:48:31,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:48:31,499 INFO L87 Difference]: Start difference. First operand 375 states and 509 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 02:48:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:31,575 INFO L93 Difference]: Finished difference Result 387 states and 521 transitions. [2021-12-17 02:48:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:48:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 35 [2021-12-17 02:48:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:31,577 INFO L225 Difference]: With dead ends: 387 [2021-12-17 02:48:31,577 INFO L226 Difference]: Without dead ends: 353 [2021-12-17 02:48:31,578 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 02:48:31,578 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 262 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:31,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 411 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-17 02:48:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2021-12-17 02:48:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 288 states have (on average 1.28125) internal successors, (369), 294 states have internal predecessors, (369), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (61), 40 states have call predecessors, (61), 40 states have call successors, (61) [2021-12-17 02:48:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 476 transitions. [2021-12-17 02:48:31,590 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 476 transitions. Word has length 35 [2021-12-17 02:48:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:31,590 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 476 transitions. [2021-12-17 02:48:31,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 02:48:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 476 transitions. [2021-12-17 02:48:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 02:48:31,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:31,591 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 02:48:31,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 02:48:31,591 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:31,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1722219638, now seen corresponding path program 1 times [2021-12-17 02:48:31,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:31,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093176597] [2021-12-17 02:48:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:31,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:31,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:48:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:31,636 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 02:48:31,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:31,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093176597] [2021-12-17 02:48:31,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093176597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:31,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:31,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:48:31,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109471156] [2021-12-17 02:48:31,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:31,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:48:31,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:31,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:48:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:48:31,639 INFO L87 Difference]: Start difference. First operand 351 states and 476 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 states have internal predecessors, (34), 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 02:48:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:31,836 INFO L93 Difference]: Finished difference Result 355 states and 479 transitions. [2021-12-17 02:48:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:48:31,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 states have internal predecessors, (34), 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 37 [2021-12-17 02:48:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:31,837 INFO L225 Difference]: With dead ends: 355 [2021-12-17 02:48:31,837 INFO L226 Difference]: Without dead ends: 324 [2021-12-17 02:48:31,838 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 02:48:31,838 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 60 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:31,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1424 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-17 02:48:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2021-12-17 02:48:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 263 states have (on average 1.2889733840304183) internal successors, (339), 269 states have internal predecessors, (339), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (60), 39 states have call predecessors, (60), 39 states have call successors, (60) [2021-12-17 02:48:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 444 transitions. [2021-12-17 02:48:31,849 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 444 transitions. Word has length 37 [2021-12-17 02:48:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:31,850 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 444 transitions. [2021-12-17 02:48:31,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 states have internal predecessors, (34), 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 02:48:31,850 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 444 transitions. [2021-12-17 02:48:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 02:48:31,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:31,850 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] [2021-12-17 02:48:31,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 02:48:31,851 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:31,851 INFO L85 PathProgramCache]: Analyzing trace with hash -70447595, now seen corresponding path program 1 times [2021-12-17 02:48:31,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:31,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951684131] [2021-12-17 02:48:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:31,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:31,875 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 02:48:31,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:31,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951684131] [2021-12-17 02:48:31,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951684131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:31,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:31,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:48:31,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004558869] [2021-12-17 02:48:31,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:31,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:48:31,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:31,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:48:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:48:31,877 INFO L87 Difference]: Start difference. First operand 324 states and 444 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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 02:48:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:31,923 INFO L93 Difference]: Finished difference Result 339 states and 460 transitions. [2021-12-17 02:48:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:48:31,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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 36 [2021-12-17 02:48:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:31,925 INFO L225 Difference]: With dead ends: 339 [2021-12-17 02:48:31,925 INFO L226 Difference]: Without dead ends: 335 [2021-12-17 02:48:31,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:48:31,926 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 46 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:31,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1175 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:48:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-12-17 02:48:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 331. [2021-12-17 02:48:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 270 states have (on average 1.2851851851851852) internal successors, (347), 276 states have internal predecessors, (347), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (60), 39 states have call predecessors, (60), 39 states have call successors, (60) [2021-12-17 02:48:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 452 transitions. [2021-12-17 02:48:31,937 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 452 transitions. Word has length 36 [2021-12-17 02:48:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:31,938 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 452 transitions. [2021-12-17 02:48:31,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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 02:48:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 452 transitions. [2021-12-17 02:48:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 02:48:31,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:31,938 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] [2021-12-17 02:48:31,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 02:48:31,939 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash -70724425, now seen corresponding path program 1 times [2021-12-17 02:48:31,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:31,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283780465] [2021-12-17 02:48:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:31,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:31,961 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 02:48:31,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:31,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283780465] [2021-12-17 02:48:31,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283780465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:31,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:31,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:48:31,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121266191] [2021-12-17 02:48:31,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:31,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:48:31,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:31,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:48:31,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:48:31,963 INFO L87 Difference]: Start difference. First operand 331 states and 452 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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 02:48:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:32,000 INFO L93 Difference]: Finished difference Result 350 states and 471 transitions. [2021-12-17 02:48:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:48:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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 36 [2021-12-17 02:48:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:32,002 INFO L225 Difference]: With dead ends: 350 [2021-12-17 02:48:32,002 INFO L226 Difference]: Without dead ends: 330 [2021-12-17 02:48:32,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:48:32,003 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 38 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:32,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1215 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:48:32,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-17 02:48:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2021-12-17 02:48:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 269 states have (on average 1.2825278810408922) internal successors, (345), 275 states have internal predecessors, (345), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (60), 39 states have call predecessors, (60), 39 states have call successors, (60) [2021-12-17 02:48:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 450 transitions. [2021-12-17 02:48:32,020 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 450 transitions. Word has length 36 [2021-12-17 02:48:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:32,020 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 450 transitions. [2021-12-17 02:48:32,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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 02:48:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 450 transitions. [2021-12-17 02:48:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 02:48:32,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:32,021 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 02:48:32,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 02:48:32,021 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2018897985, now seen corresponding path program 1 times [2021-12-17 02:48:32,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:32,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051955932] [2021-12-17 02:48:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:32,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:32,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 02:48:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:32,047 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 02:48:32,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:32,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051955932] [2021-12-17 02:48:32,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051955932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:32,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:32,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:48:32,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262961437] [2021-12-17 02:48:32,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:32,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:48:32,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:32,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:48:32,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:48:32,048 INFO L87 Difference]: Start difference. First operand 330 states and 450 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 02:48:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:32,147 INFO L93 Difference]: Finished difference Result 359 states and 487 transitions. [2021-12-17 02:48:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:48:32,148 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 02:48:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:32,150 INFO L225 Difference]: With dead ends: 359 [2021-12-17 02:48:32,150 INFO L226 Difference]: Without dead ends: 329 [2021-12-17 02:48:32,151 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 02:48:32,152 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 79 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:32,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1079 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-17 02:48:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 315. [2021-12-17 02:48:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 256 states have (on average 1.2890625) internal successors, (330), 262 states have internal predecessors, (330), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-12-17 02:48:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 433 transitions. [2021-12-17 02:48:32,166 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 433 transitions. Word has length 38 [2021-12-17 02:48:32,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:32,166 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 433 transitions. [2021-12-17 02:48:32,166 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 02:48:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 433 transitions. [2021-12-17 02:48:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 02:48:32,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:32,167 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 02:48:32,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 02:48:32,167 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:32,167 INFO L85 PathProgramCache]: Analyzing trace with hash 233401978, now seen corresponding path program 1 times [2021-12-17 02:48:32,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:32,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986150583] [2021-12-17 02:48:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:32,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:32,208 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 02:48:32,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:32,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986150583] [2021-12-17 02:48:32,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986150583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:32,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:32,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:48:32,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049395509] [2021-12-17 02:48:32,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:32,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:48:32,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:32,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:48:32,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:48:32,210 INFO L87 Difference]: Start difference. First operand 315 states and 433 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 02:48:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:32,346 INFO L93 Difference]: Finished difference Result 431 states and 618 transitions. [2021-12-17 02:48:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:48:32,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 37 [2021-12-17 02:48:32,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:32,348 INFO L225 Difference]: With dead ends: 431 [2021-12-17 02:48:32,348 INFO L226 Difference]: Without dead ends: 402 [2021-12-17 02:48:32,348 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 02:48:32,349 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 344 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:32,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 504 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:32,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-17 02:48:32,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2021-12-17 02:48:32,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 233 states have (on average 1.3004291845493563) internal successors, (303), 239 states have internal predecessors, (303), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-12-17 02:48:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 406 transitions. [2021-12-17 02:48:32,361 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 406 transitions. Word has length 37 [2021-12-17 02:48:32,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:32,361 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 406 transitions. [2021-12-17 02:48:32,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 02:48:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 406 transitions. [2021-12-17 02:48:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 02:48:32,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:32,362 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] [2021-12-17 02:48:32,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 02:48:32,362 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:32,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:32,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1150124824, now seen corresponding path program 1 times [2021-12-17 02:48:32,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:32,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796176237] [2021-12-17 02:48:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:32,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:32,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 02:48:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:32,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 02:48:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:32,389 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 02:48:32,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:32,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796176237] [2021-12-17 02:48:32,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796176237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:32,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:32,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:48:32,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620589307] [2021-12-17 02:48:32,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:32,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:48:32,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:32,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:48:32,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:48:32,390 INFO L87 Difference]: Start difference. First operand 292 states and 406 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:48:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:32,535 INFO L93 Difference]: Finished difference Result 544 states and 787 transitions. [2021-12-17 02:48:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:48:32,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-12-17 02:48:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:32,537 INFO L225 Difference]: With dead ends: 544 [2021-12-17 02:48:32,537 INFO L226 Difference]: Without dead ends: 310 [2021-12-17 02:48:32,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:48:32,538 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 112 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:32,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 639 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:32,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-12-17 02:48:32,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 302. [2021-12-17 02:48:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 243 states have (on average 1.3045267489711934) internal successors, (317), 248 states have internal predecessors, (317), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-12-17 02:48:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 420 transitions. [2021-12-17 02:48:32,550 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 420 transitions. Word has length 43 [2021-12-17 02:48:32,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:32,551 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 420 transitions. [2021-12-17 02:48:32,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:48:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 420 transitions. [2021-12-17 02:48:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 02:48:32,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:32,551 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] [2021-12-17 02:48:32,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 02:48:32,552 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:32,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:32,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1967801604, now seen corresponding path program 1 times [2021-12-17 02:48:32,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:32,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927729158] [2021-12-17 02:48:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:32,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:32,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 02:48:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:32,598 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 02:48:32,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:32,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927729158] [2021-12-17 02:48:32,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927729158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:32,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:32,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:48:32,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444440015] [2021-12-17 02:48:32,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:32,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:48:32,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:32,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:48:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:48:32,600 INFO L87 Difference]: Start difference. First operand 302 states and 420 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 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 02:48:32,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:32,811 INFO L93 Difference]: Finished difference Result 304 states and 421 transitions. [2021-12-17 02:48:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:48:32,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 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 43 [2021-12-17 02:48:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:32,813 INFO L225 Difference]: With dead ends: 304 [2021-12-17 02:48:32,813 INFO L226 Difference]: Without dead ends: 270 [2021-12-17 02:48:32,813 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 02:48:32,813 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 68 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:32,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1244 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-17 02:48:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-12-17 02:48:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 214 states have (on average 1.3271028037383177) internal successors, (284), 218 states have internal predecessors, (284), 42 states have call successors, (42), 14 states have call predecessors, (42), 13 states have return successors, (58), 37 states have call predecessors, (58), 37 states have call successors, (58) [2021-12-17 02:48:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 384 transitions. [2021-12-17 02:48:32,824 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 384 transitions. Word has length 43 [2021-12-17 02:48:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:32,824 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 384 transitions. [2021-12-17 02:48:32,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 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 02:48:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 384 transitions. [2021-12-17 02:48:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 02:48:32,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:32,825 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 02:48:32,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 02:48:32,825 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash -896869873, now seen corresponding path program 1 times [2021-12-17 02:48:32,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:32,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107953517] [2021-12-17 02:48:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:32,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:32,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:48:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:32,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:32,956 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 02:48:32,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107953517] [2021-12-17 02:48:32,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107953517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:32,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:32,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:48:32,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238268151] [2021-12-17 02:48:32,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:32,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:48:32,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:48:32,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:48:32,958 INFO L87 Difference]: Start difference. First operand 270 states and 384 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:48:33,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:33,114 INFO L93 Difference]: Finished difference Result 501 states and 736 transitions. [2021-12-17 02:48:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:48:33,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-17 02:48:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:33,115 INFO L225 Difference]: With dead ends: 501 [2021-12-17 02:48:33,116 INFO L226 Difference]: Without dead ends: 257 [2021-12-17 02:48:33,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:48:33,117 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 96 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:33,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1309 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-17 02:48:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 251. [2021-12-17 02:48:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 196 states have (on average 1.3010204081632653) internal successors, (255), 199 states have internal predecessors, (255), 41 states have call successors, (41), 14 states have call predecessors, (41), 13 states have return successors, (58), 37 states have call predecessors, (58), 37 states have call successors, (58) [2021-12-17 02:48:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 354 transitions. [2021-12-17 02:48:33,135 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 354 transitions. Word has length 48 [2021-12-17 02:48:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:33,136 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 354 transitions. [2021-12-17 02:48:33,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:48:33,136 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 354 transitions. [2021-12-17 02:48:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 02:48:33,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:33,137 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 02:48:33,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 02:48:33,137 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:33,137 INFO L85 PathProgramCache]: Analyzing trace with hash -117067224, now seen corresponding path program 1 times [2021-12-17 02:48:33,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:33,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783660618] [2021-12-17 02:48:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:33,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:48:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,199 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 02:48:33,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:33,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783660618] [2021-12-17 02:48:33,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783660618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:33,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:33,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:48:33,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410549375] [2021-12-17 02:48:33,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:33,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:48:33,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:33,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:48:33,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:48:33,201 INFO L87 Difference]: Start difference. First operand 251 states and 354 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:48:33,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:33,424 INFO L93 Difference]: Finished difference Result 482 states and 700 transitions. [2021-12-17 02:48:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:48:33,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2021-12-17 02:48:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:33,426 INFO L225 Difference]: With dead ends: 482 [2021-12-17 02:48:33,426 INFO L226 Difference]: Without dead ends: 257 [2021-12-17 02:48:33,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:48:33,427 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 217 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:33,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 843 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-17 02:48:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 251. [2021-12-17 02:48:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 196 states have (on average 1.2908163265306123) internal successors, (253), 199 states have internal predecessors, (253), 41 states have call successors, (41), 14 states have call predecessors, (41), 13 states have return successors, (58), 37 states have call predecessors, (58), 37 states have call successors, (58) [2021-12-17 02:48:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 352 transitions. [2021-12-17 02:48:33,440 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 352 transitions. Word has length 52 [2021-12-17 02:48:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:33,440 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 352 transitions. [2021-12-17 02:48:33,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:48:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 352 transitions. [2021-12-17 02:48:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 02:48:33,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:33,441 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] [2021-12-17 02:48:33,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 02:48:33,441 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash 952481223, now seen corresponding path program 1 times [2021-12-17 02:48:33,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:33,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160992850] [2021-12-17 02:48:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:33,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 02:48:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,494 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 02:48:33,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:33,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160992850] [2021-12-17 02:48:33,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160992850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:33,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:33,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:48:33,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388779198] [2021-12-17 02:48:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:33,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:48:33,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:33,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:48:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:48:33,497 INFO L87 Difference]: Start difference. First operand 251 states and 352 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:48:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:33,672 INFO L93 Difference]: Finished difference Result 497 states and 725 transitions. [2021-12-17 02:48:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:48:33,672 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-12-17 02:48:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:33,674 INFO L225 Difference]: With dead ends: 497 [2021-12-17 02:48:33,674 INFO L226 Difference]: Without dead ends: 271 [2021-12-17 02:48:33,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:48:33,675 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 50 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:33,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1182 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-17 02:48:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 256. [2021-12-17 02:48:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 200 states have (on average 1.285) internal successors, (257), 203 states have internal predecessors, (257), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (67), 38 states have call predecessors, (67), 37 states have call successors, (67) [2021-12-17 02:48:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 365 transitions. [2021-12-17 02:48:33,686 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 365 transitions. Word has length 53 [2021-12-17 02:48:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:33,687 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 365 transitions. [2021-12-17 02:48:33,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:48:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 365 transitions. [2021-12-17 02:48:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 02:48:33,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:33,687 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] [2021-12-17 02:48:33,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 02:48:33,688 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1047088286, now seen corresponding path program 1 times [2021-12-17 02:48:33,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:33,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258696922] [2021-12-17 02:48:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:33,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:48:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,733 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 02:48:33,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:33,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258696922] [2021-12-17 02:48:33,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258696922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:33,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:33,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:48:33,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359896006] [2021-12-17 02:48:33,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:33,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:48:33,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:48:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:48:33,736 INFO L87 Difference]: Start difference. First operand 256 states and 365 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:48:33,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:33,917 INFO L93 Difference]: Finished difference Result 392 states and 581 transitions. [2021-12-17 02:48:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:48:33,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2021-12-17 02:48:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:33,920 INFO L225 Difference]: With dead ends: 392 [2021-12-17 02:48:33,920 INFO L226 Difference]: Without dead ends: 389 [2021-12-17 02:48:33,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:48:33,921 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 130 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:33,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 908 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:33,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-17 02:48:33,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 260. [2021-12-17 02:48:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 204 states have (on average 1.2892156862745099) internal successors, (263), 207 states have internal predecessors, (263), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (67), 38 states have call predecessors, (67), 37 states have call successors, (67) [2021-12-17 02:48:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 371 transitions. [2021-12-17 02:48:33,936 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 371 transitions. Word has length 55 [2021-12-17 02:48:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:33,936 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 371 transitions. [2021-12-17 02:48:33,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:48:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 371 transitions. [2021-12-17 02:48:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 02:48:33,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:33,937 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 02:48:33,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 02:48:33,937 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:33,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:33,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1661954664, now seen corresponding path program 1 times [2021-12-17 02:48:33,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:33,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646483202] [2021-12-17 02:48:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:33,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:48:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:33,993 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 02:48:33,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646483202] [2021-12-17 02:48:33,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646483202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:33,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:33,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:48:33,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726565742] [2021-12-17 02:48:33,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:33,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:48:33,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:33,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:48:33,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:48:33,994 INFO L87 Difference]: Start difference. First operand 260 states and 371 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:48:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:34,147 INFO L93 Difference]: Finished difference Result 595 states and 864 transitions. [2021-12-17 02:48:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:48:34,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-12-17 02:48:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:34,149 INFO L225 Difference]: With dead ends: 595 [2021-12-17 02:48:34,149 INFO L226 Difference]: Without dead ends: 366 [2021-12-17 02:48:34,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:48:34,150 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 268 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:34,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 549 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:34,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-17 02:48:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 341. [2021-12-17 02:48:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 267 states have (on average 1.2659176029962547) internal successors, (338), 271 states have internal predecessors, (338), 52 states have call successors, (52), 18 states have call predecessors, (52), 21 states have return successors, (91), 51 states have call predecessors, (91), 49 states have call successors, (91) [2021-12-17 02:48:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 481 transitions. [2021-12-17 02:48:34,165 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 481 transitions. Word has length 56 [2021-12-17 02:48:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:34,165 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 481 transitions. [2021-12-17 02:48:34,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:48:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 481 transitions. [2021-12-17 02:48:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 02:48:34,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:34,166 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] [2021-12-17 02:48:34,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 02:48:34,167 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:34,167 INFO L85 PathProgramCache]: Analyzing trace with hash 942519397, now seen corresponding path program 1 times [2021-12-17 02:48:34,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:34,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335802353] [2021-12-17 02:48:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:34,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:48:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,258 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 02:48:34,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:34,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335802353] [2021-12-17 02:48:34,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335802353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:34,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:34,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:48:34,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168192890] [2021-12-17 02:48:34,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:34,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:48:34,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:34,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:48:34,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:48:34,260 INFO L87 Difference]: Start difference. First operand 341 states and 481 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:48:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:34,424 INFO L93 Difference]: Finished difference Result 650 states and 927 transitions. [2021-12-17 02:48:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:48:34,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2021-12-17 02:48:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:34,426 INFO L225 Difference]: With dead ends: 650 [2021-12-17 02:48:34,426 INFO L226 Difference]: Without dead ends: 338 [2021-12-17 02:48:34,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:48:34,427 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 94 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:34,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1136 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-17 02:48:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 335. [2021-12-17 02:48:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 263 states have (on average 1.2547528517110267) internal successors, (330), 266 states have internal predecessors, (330), 51 states have call successors, (51), 18 states have call predecessors, (51), 20 states have return successors, (83), 50 states have call predecessors, (83), 48 states have call successors, (83) [2021-12-17 02:48:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 464 transitions. [2021-12-17 02:48:34,442 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 464 transitions. Word has length 57 [2021-12-17 02:48:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:34,443 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 464 transitions. [2021-12-17 02:48:34,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:48:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 464 transitions. [2021-12-17 02:48:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 02:48:34,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:34,445 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, 1, 1] [2021-12-17 02:48:34,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 02:48:34,445 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:34,445 INFO L85 PathProgramCache]: Analyzing trace with hash -146309345, now seen corresponding path program 1 times [2021-12-17 02:48:34,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:34,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555384238] [2021-12-17 02:48:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:34,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:48:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 02:48:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,522 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 02:48:34,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555384238] [2021-12-17 02:48:34,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555384238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:34,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:34,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:48:34,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097938186] [2021-12-17 02:48:34,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:34,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:48:34,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:48:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:48:34,523 INFO L87 Difference]: Start difference. First operand 335 states and 464 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:48:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:34,772 INFO L93 Difference]: Finished difference Result 607 states and 844 transitions. [2021-12-17 02:48:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:48:34,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-17 02:48:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:34,774 INFO L225 Difference]: With dead ends: 607 [2021-12-17 02:48:34,775 INFO L226 Difference]: Without dead ends: 312 [2021-12-17 02:48:34,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:48:34,776 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 183 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:34,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 944 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-17 02:48:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2021-12-17 02:48:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 238 states have (on average 1.2605042016806722) internal successors, (300), 244 states have internal predecessors, (300), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (63), 41 states have call predecessors, (63), 45 states have call successors, (63) [2021-12-17 02:48:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 411 transitions. [2021-12-17 02:48:34,789 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 411 transitions. Word has length 68 [2021-12-17 02:48:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:34,790 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 411 transitions. [2021-12-17 02:48:34,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:48:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 411 transitions. [2021-12-17 02:48:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 02:48:34,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:34,791 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] [2021-12-17 02:48:34,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 02:48:34,791 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:34,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1989043251, now seen corresponding path program 1 times [2021-12-17 02:48:34,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:34,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545516792] [2021-12-17 02:48:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:34,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:48:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 02:48:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:34,926 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 02:48:34,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:34,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545516792] [2021-12-17 02:48:34,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545516792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:34,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:34,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-17 02:48:34,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825986565] [2021-12-17 02:48:34,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:34,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 02:48:34,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 02:48:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:48:34,928 INFO L87 Difference]: Start difference. First operand 304 states and 411 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:48:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:35,225 INFO L93 Difference]: Finished difference Result 348 states and 471 transitions. [2021-12-17 02:48:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 02:48:35,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2021-12-17 02:48:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:35,227 INFO L225 Difference]: With dead ends: 348 [2021-12-17 02:48:35,227 INFO L226 Difference]: Without dead ends: 327 [2021-12-17 02:48:35,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-12-17 02:48:35,228 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 139 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 2340 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:35,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 2340 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-17 02:48:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 315. [2021-12-17 02:48:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 247 states have (on average 1.2510121457489878) internal successors, (309), 254 states have internal predecessors, (309), 48 states have call successors, (48), 18 states have call predecessors, (48), 19 states have return successors, (69), 42 states have call predecessors, (69), 45 states have call successors, (69) [2021-12-17 02:48:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 426 transitions. [2021-12-17 02:48:35,242 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 426 transitions. Word has length 73 [2021-12-17 02:48:35,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:35,242 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 426 transitions. [2021-12-17 02:48:35,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:48:35,242 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 426 transitions. [2021-12-17 02:48:35,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 02:48:35,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:35,243 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] [2021-12-17 02:48:35,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 02:48:35,243 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash -182846632, now seen corresponding path program 1 times [2021-12-17 02:48:35,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:35,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599254260] [2021-12-17 02:48:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:35,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:48:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 02:48:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,378 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 02:48:35,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:35,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599254260] [2021-12-17 02:48:35,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599254260] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:35,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:35,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-17 02:48:35,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477665465] [2021-12-17 02:48:35,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:35,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 02:48:35,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:35,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 02:48:35,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:48:35,388 INFO L87 Difference]: Start difference. First operand 315 states and 426 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:48:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:35,754 INFO L93 Difference]: Finished difference Result 346 states and 467 transitions. [2021-12-17 02:48:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 02:48:35,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 74 [2021-12-17 02:48:35,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:35,757 INFO L225 Difference]: With dead ends: 346 [2021-12-17 02:48:35,757 INFO L226 Difference]: Without dead ends: 325 [2021-12-17 02:48:35,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-12-17 02:48:35,758 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 105 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 2715 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:35,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 2715 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 02:48:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-12-17 02:48:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 302. [2021-12-17 02:48:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 237 states have (on average 1.261603375527426) internal successors, (299), 243 states have internal predecessors, (299), 47 states have call successors, (47), 18 states have call predecessors, (47), 17 states have return successors, (61), 40 states have call predecessors, (61), 44 states have call successors, (61) [2021-12-17 02:48:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 407 transitions. [2021-12-17 02:48:35,773 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 407 transitions. Word has length 74 [2021-12-17 02:48:35,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:35,773 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 407 transitions. [2021-12-17 02:48:35,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:48:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 407 transitions. [2021-12-17 02:48:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-17 02:48:35,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:35,775 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] [2021-12-17 02:48:35,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 02:48:35,775 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:35,775 INFO L85 PathProgramCache]: Analyzing trace with hash -673237615, now seen corresponding path program 1 times [2021-12-17 02:48:35,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:35,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489137267] [2021-12-17 02:48:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:35,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:48:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 02:48:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 02:48:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:35,941 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 02:48:35,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:35,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489137267] [2021-12-17 02:48:35,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489137267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:35,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:35,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 02:48:35,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244440711] [2021-12-17 02:48:35,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:35,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 02:48:35,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:35,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 02:48:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-17 02:48:35,944 INFO L87 Difference]: Start difference. First operand 302 states and 407 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 02:48:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:36,434 INFO L93 Difference]: Finished difference Result 457 states and 680 transitions. [2021-12-17 02:48:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 02:48:36,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2021-12-17 02:48:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:36,437 INFO L225 Difference]: With dead ends: 457 [2021-12-17 02:48:36,437 INFO L226 Difference]: Without dead ends: 418 [2021-12-17 02:48:36,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-12-17 02:48:36,438 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 215 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2479 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:36,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 2479 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 02:48:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-17 02:48:36,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 406. [2021-12-17 02:48:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 312 states have (on average 1.2628205128205128) internal successors, (394), 322 states have internal predecessors, (394), 74 states have call successors, (74), 18 states have call predecessors, (74), 19 states have return successors, (105), 65 states have call predecessors, (105), 70 states have call successors, (105) [2021-12-17 02:48:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 573 transitions. [2021-12-17 02:48:36,458 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 573 transitions. Word has length 82 [2021-12-17 02:48:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:36,458 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 573 transitions. [2021-12-17 02:48:36,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 02:48:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 573 transitions. [2021-12-17 02:48:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 02:48:36,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:36,460 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 02:48:36,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 02:48:36,461 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash 716383564, now seen corresponding path program 1 times [2021-12-17 02:48:36,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:36,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560514279] [2021-12-17 02:48:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:36,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:36,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:48:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:36,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:36,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:36,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:36,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 02:48:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:36,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 02:48:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:36,625 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 02:48:36,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:36,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560514279] [2021-12-17 02:48:36,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560514279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:36,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:36,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 02:48:36,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144870162] [2021-12-17 02:48:36,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:36,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 02:48:36,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:36,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 02:48:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-17 02:48:36,628 INFO L87 Difference]: Start difference. First operand 406 states and 573 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 02:48:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:37,208 INFO L93 Difference]: Finished difference Result 544 states and 828 transitions. [2021-12-17 02:48:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 02:48:37,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 83 [2021-12-17 02:48:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:37,212 INFO L225 Difference]: With dead ends: 544 [2021-12-17 02:48:37,212 INFO L226 Difference]: Without dead ends: 505 [2021-12-17 02:48:37,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-12-17 02:48:37,213 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 200 mSDsluCounter, 2741 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:37,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2990 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 02:48:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-12-17 02:48:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 389. [2021-12-17 02:48:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 299 states have (on average 1.2709030100334449) internal successors, (380), 308 states have internal predecessors, (380), 72 states have call successors, (72), 18 states have call predecessors, (72), 17 states have return successors, (94), 62 states have call predecessors, (94), 68 states have call successors, (94) [2021-12-17 02:48:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 546 transitions. [2021-12-17 02:48:37,235 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 546 transitions. Word has length 83 [2021-12-17 02:48:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:37,236 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 546 transitions. [2021-12-17 02:48:37,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 02:48:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 546 transitions. [2021-12-17 02:48:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 02:48:37,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:37,237 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, 1] [2021-12-17 02:48:37,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 02:48:37,237 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:37,237 INFO L85 PathProgramCache]: Analyzing trace with hash 971177342, now seen corresponding path program 1 times [2021-12-17 02:48:37,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:37,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791217341] [2021-12-17 02:48:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:37,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:37,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:48:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:37,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:37,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:37,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:37,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 02:48:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:37,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 02:48:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:37,362 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 02:48:37,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:37,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791217341] [2021-12-17 02:48:37,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791217341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:37,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:37,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 02:48:37,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627391597] [2021-12-17 02:48:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:37,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 02:48:37,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 02:48:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:48:37,365 INFO L87 Difference]: Start difference. First operand 389 states and 546 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 02:48:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:37,915 INFO L93 Difference]: Finished difference Result 770 states and 1094 transitions. [2021-12-17 02:48:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 02:48:37,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-12-17 02:48:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:37,919 INFO L225 Difference]: With dead ends: 770 [2021-12-17 02:48:37,919 INFO L226 Difference]: Without dead ends: 746 [2021-12-17 02:48:37,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-12-17 02:48:37,920 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 298 mSDsluCounter, 2135 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:37,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 2361 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 02:48:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-17 02:48:37,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 703. [2021-12-17 02:48:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 535 states have (on average 1.2654205607476636) internal successors, (677), 552 states have internal predecessors, (677), 135 states have call successors, (135), 32 states have call predecessors, (135), 32 states have return successors, (183), 118 states have call predecessors, (183), 131 states have call successors, (183) [2021-12-17 02:48:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 995 transitions. [2021-12-17 02:48:37,953 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 995 transitions. Word has length 84 [2021-12-17 02:48:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:37,953 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 995 transitions. [2021-12-17 02:48:37,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 02:48:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 995 transitions. [2021-12-17 02:48:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 02:48:37,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:37,954 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, 1] [2021-12-17 02:48:37,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 02:48:37,954 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:37,955 INFO L85 PathProgramCache]: Analyzing trace with hash -171325124, now seen corresponding path program 1 times [2021-12-17 02:48:37,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:37,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872169643] [2021-12-17 02:48:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:37,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:48:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 02:48:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 02:48:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,093 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 02:48:38,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872169643] [2021-12-17 02:48:38,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872169643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:38,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:38,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 02:48:38,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165668993] [2021-12-17 02:48:38,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:38,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 02:48:38,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:38,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 02:48:38,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:48:38,096 INFO L87 Difference]: Start difference. First operand 703 states and 995 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 02:48:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:38,629 INFO L93 Difference]: Finished difference Result 767 states and 1087 transitions. [2021-12-17 02:48:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 02:48:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-12-17 02:48:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:38,633 INFO L225 Difference]: With dead ends: 767 [2021-12-17 02:48:38,633 INFO L226 Difference]: Without dead ends: 739 [2021-12-17 02:48:38,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-12-17 02:48:38,635 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 306 mSDsluCounter, 2944 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 3301 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:38,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 3301 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 02:48:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-12-17 02:48:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 382. [2021-12-17 02:48:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 294 states have (on average 1.272108843537415) internal successors, (374), 303 states have internal predecessors, (374), 70 states have call successors, (70), 18 states have call predecessors, (70), 17 states have return successors, (92), 60 states have call predecessors, (92), 66 states have call successors, (92) [2021-12-17 02:48:38,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 536 transitions. [2021-12-17 02:48:38,655 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 536 transitions. Word has length 84 [2021-12-17 02:48:38,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:38,655 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 536 transitions. [2021-12-17 02:48:38,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 02:48:38,656 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 536 transitions. [2021-12-17 02:48:38,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 02:48:38,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:38,657 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:48:38,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 02:48:38,657 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:38,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1715684878, now seen corresponding path program 1 times [2021-12-17 02:48:38,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:38,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203500499] [2021-12-17 02:48:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:38,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:48:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 02:48:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 02:48:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 02:48:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:38,810 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 02:48:38,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:38,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203500499] [2021-12-17 02:48:38,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203500499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:38,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:38,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-17 02:48:38,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901524593] [2021-12-17 02:48:38,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:38,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 02:48:38,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:38,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 02:48:38,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:48:38,812 INFO L87 Difference]: Start difference. First operand 382 states and 536 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 02:48:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:39,568 INFO L93 Difference]: Finished difference Result 772 states and 1092 transitions. [2021-12-17 02:48:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 02:48:39,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 93 [2021-12-17 02:48:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:39,571 INFO L225 Difference]: With dead ends: 772 [2021-12-17 02:48:39,571 INFO L226 Difference]: Without dead ends: 725 [2021-12-17 02:48:39,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 02:48:39,572 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 539 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 2406 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:39,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 2406 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 02:48:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-17 02:48:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 701. [2021-12-17 02:48:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 536 states have (on average 1.2388059701492538) internal successors, (664), 552 states have internal predecessors, (664), 132 states have call successors, (132), 33 states have call predecessors, (132), 32 states have return successors, (175), 115 states have call predecessors, (175), 127 states have call successors, (175) [2021-12-17 02:48:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 971 transitions. [2021-12-17 02:48:39,605 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 971 transitions. Word has length 93 [2021-12-17 02:48:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:39,606 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 971 transitions. [2021-12-17 02:48:39,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 02:48:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 971 transitions. [2021-12-17 02:48:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 02:48:39,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:39,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:48:39,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 02:48:39,607 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:39,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash 327002288, now seen corresponding path program 1 times [2021-12-17 02:48:39,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:39,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927475809] [2021-12-17 02:48:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:39,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:39,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:48:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:39,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:39,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:39,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:39,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 02:48:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:39,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 02:48:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:39,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:39,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 02:48:39,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:39,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927475809] [2021-12-17 02:48:39,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927475809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:39,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:39,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 02:48:39,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679262218] [2021-12-17 02:48:39,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:39,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 02:48:39,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 02:48:39,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:48:39,703 INFO L87 Difference]: Start difference. First operand 701 states and 971 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 02:48:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:39,976 INFO L93 Difference]: Finished difference Result 1523 states and 2174 transitions. [2021-12-17 02:48:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:48:39,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 95 [2021-12-17 02:48:39,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:39,981 INFO L225 Difference]: With dead ends: 1523 [2021-12-17 02:48:39,981 INFO L226 Difference]: Without dead ends: 985 [2021-12-17 02:48:39,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:48:39,983 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 193 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:39,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1595 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:39,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-12-17 02:48:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 677. [2021-12-17 02:48:40,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 520 states have (on average 1.2153846153846153) internal successors, (632), 532 states have internal predecessors, (632), 124 states have call successors, (124), 33 states have call predecessors, (124), 32 states have return successors, (163), 111 states have call predecessors, (163), 119 states have call successors, (163) [2021-12-17 02:48:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 919 transitions. [2021-12-17 02:48:40,021 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 919 transitions. Word has length 95 [2021-12-17 02:48:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:40,021 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 919 transitions. [2021-12-17 02:48:40,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 02:48:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 919 transitions. [2021-12-17 02:48:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 02:48:40,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:40,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:48:40,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 02:48:40,023 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:40,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:40,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1808548852, now seen corresponding path program 1 times [2021-12-17 02:48:40,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:40,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935165383] [2021-12-17 02:48:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:40,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:40,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:48:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:40,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:40,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:40,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:40,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 02:48:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:40,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 02:48:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:40,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 02:48:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:40,174 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 02:48:40,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935165383] [2021-12-17 02:48:40,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935165383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:40,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:40,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-17 02:48:40,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544609735] [2021-12-17 02:48:40,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:40,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 02:48:40,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:40,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 02:48:40,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:48:40,176 INFO L87 Difference]: Start difference. First operand 677 states and 919 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 02:48:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:41,057 INFO L93 Difference]: Finished difference Result 707 states and 964 transitions. [2021-12-17 02:48:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 02:48:41,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 93 [2021-12-17 02:48:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:41,061 INFO L225 Difference]: With dead ends: 707 [2021-12-17 02:48:41,061 INFO L226 Difference]: Without dead ends: 658 [2021-12-17 02:48:41,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 02:48:41,062 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 372 mSDsluCounter, 2993 mSDsCounter, 0 mSdLazyCounter, 1773 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 3359 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:41,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 3359 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1773 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 02:48:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-12-17 02:48:41,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 244. [2021-12-17 02:48:41,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 190 states have (on average 1.1526315789473685) internal successors, (219), 194 states have internal predecessors, (219), 38 states have call successors, (38), 16 states have call predecessors, (38), 15 states have return successors, (47), 33 states have call predecessors, (47), 35 states have call successors, (47) [2021-12-17 02:48:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 304 transitions. [2021-12-17 02:48:41,080 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 304 transitions. Word has length 93 [2021-12-17 02:48:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:41,080 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 304 transitions. [2021-12-17 02:48:41,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 02:48:41,080 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 304 transitions. [2021-12-17 02:48:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-17 02:48:41,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:41,081 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:48:41,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 02:48:41,082 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:41,082 INFO L85 PathProgramCache]: Analyzing trace with hash 46403579, now seen corresponding path program 1 times [2021-12-17 02:48:41,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:41,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931498444] [2021-12-17 02:48:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:41,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:48:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 02:48:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 02:48:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 02:48:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 02:48:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-17 02:48:41,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:41,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931498444] [2021-12-17 02:48:41,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931498444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:48:41,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984255491] [2021-12-17 02:48:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:41,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:48:41,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:48:41,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:48:41,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 02:48:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 02:48:41,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:48:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 02:48:41,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:48:41,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984255491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:41,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 02:48:41,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-12-17 02:48:41,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979929078] [2021-12-17 02:48:41,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:41,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:48:41,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:41,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:48:41,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:48:41,629 INFO L87 Difference]: Start difference. First operand 244 states and 304 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 02:48:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:41,694 INFO L93 Difference]: Finished difference Result 452 states and 566 transitions. [2021-12-17 02:48:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:48:41,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 133 [2021-12-17 02:48:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:41,696 INFO L225 Difference]: With dead ends: 452 [2021-12-17 02:48:41,696 INFO L226 Difference]: Without dead ends: 266 [2021-12-17 02:48:41,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:48:41,697 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 12 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:41,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 720 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:48:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-17 02:48:41,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2021-12-17 02:48:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 204 states have (on average 1.142156862745098) internal successors, (233), 209 states have internal predecessors, (233), 38 states have call successors, (38), 16 states have call predecessors, (38), 17 states have return successors, (55), 34 states have call predecessors, (55), 35 states have call successors, (55) [2021-12-17 02:48:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 326 transitions. [2021-12-17 02:48:41,728 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 326 transitions. Word has length 133 [2021-12-17 02:48:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:41,728 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 326 transitions. [2021-12-17 02:48:41,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 02:48:41,729 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 326 transitions. [2021-12-17 02:48:41,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-17 02:48:41,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:41,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:48:41,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 02:48:41,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:48:41,930 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1067504510, now seen corresponding path program 1 times [2021-12-17 02:48:41,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:41,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679731600] [2021-12-17 02:48:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:41,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:48:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:41,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 02:48:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 02:48:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 02:48:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 02:48:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-17 02:48:42,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:42,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679731600] [2021-12-17 02:48:42,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679731600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:42,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:42,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 02:48:42,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595757558] [2021-12-17 02:48:42,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:42,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 02:48:42,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:42,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 02:48:42,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:48:42,049 INFO L87 Difference]: Start difference. First operand 260 states and 326 transitions. Second operand has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-17 02:48:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:42,290 INFO L93 Difference]: Finished difference Result 472 states and 583 transitions. [2021-12-17 02:48:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:48:42,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 134 [2021-12-17 02:48:42,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:42,292 INFO L225 Difference]: With dead ends: 472 [2021-12-17 02:48:42,292 INFO L226 Difference]: Without dead ends: 300 [2021-12-17 02:48:42,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:48:42,293 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 145 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:42,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1105 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:42,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-17 02:48:42,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 253. [2021-12-17 02:48:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 199 states have (on average 1.1256281407035176) internal successors, (224), 203 states have internal predecessors, (224), 36 states have call successors, (36), 16 states have call predecessors, (36), 17 states have return successors, (51), 33 states have call predecessors, (51), 33 states have call successors, (51) [2021-12-17 02:48:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 311 transitions. [2021-12-17 02:48:42,309 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 311 transitions. Word has length 134 [2021-12-17 02:48:42,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:42,309 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 311 transitions. [2021-12-17 02:48:42,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-17 02:48:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 311 transitions. [2021-12-17 02:48:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-17 02:48:42,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:42,311 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:48:42,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 02:48:42,311 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1031777441, now seen corresponding path program 1 times [2021-12-17 02:48:42,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:42,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184587843] [2021-12-17 02:48:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:42,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:48:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 02:48:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 02:48:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 02:48:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 02:48:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 02:48:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 02:48:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-17 02:48:42,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:42,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184587843] [2021-12-17 02:48:42,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184587843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:42,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:42,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 02:48:42,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381066314] [2021-12-17 02:48:42,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:42,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 02:48:42,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:42,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 02:48:42,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:48:42,460 INFO L87 Difference]: Start difference. First operand 253 states and 311 transitions. Second operand has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-17 02:48:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:42,712 INFO L93 Difference]: Finished difference Result 322 states and 392 transitions. [2021-12-17 02:48:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:48:42,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 170 [2021-12-17 02:48:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:42,714 INFO L225 Difference]: With dead ends: 322 [2021-12-17 02:48:42,714 INFO L226 Difference]: Without dead ends: 255 [2021-12-17 02:48:42,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:48:42,714 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 123 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:42,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 1036 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:48:42,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-17 02:48:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 228. [2021-12-17 02:48:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 181 states have (on average 1.1104972375690607) internal successors, (201), 184 states have internal predecessors, (201), 31 states have call successors, (31), 12 states have call predecessors, (31), 15 states have return successors, (47), 31 states have call predecessors, (47), 29 states have call successors, (47) [2021-12-17 02:48:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 279 transitions. [2021-12-17 02:48:42,727 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 279 transitions. Word has length 170 [2021-12-17 02:48:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:42,728 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 279 transitions. [2021-12-17 02:48:42,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-17 02:48:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 279 transitions. [2021-12-17 02:48:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-17 02:48:42,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:42,729 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:48:42,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 02:48:42,730 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:42,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:42,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1337713774, now seen corresponding path program 1 times [2021-12-17 02:48:42,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:48:42,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747628116] [2021-12-17 02:48:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:48:42,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:48:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 02:48:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:48:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 02:48:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 02:48:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 02:48:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 02:48:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 02:48:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 02:48:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:48:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 02:48:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-17 02:48:42,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:48:42,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747628116] [2021-12-17 02:48:42,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747628116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:48:42,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:48:42,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 02:48:42,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456437904] [2021-12-17 02:48:42,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:48:42,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 02:48:42,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:48:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 02:48:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:48:42,873 INFO L87 Difference]: Start difference. First operand 228 states and 279 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-17 02:48:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:43,065 INFO L93 Difference]: Finished difference Result 234 states and 288 transitions. [2021-12-17 02:48:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:48:43,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 173 [2021-12-17 02:48:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:43,066 INFO L225 Difference]: With dead ends: 234 [2021-12-17 02:48:43,066 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 02:48:43,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:48:43,069 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 122 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:43,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 721 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:48:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 02:48:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 02:48:43,069 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 02:48:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 02:48:43,070 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2021-12-17 02:48:43,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:43,070 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 02:48:43,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-17 02:48:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 02:48:43,070 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 02:48:43,072 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 02:48:43,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 02:48:43,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. Killed by 15