./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.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/diskperf.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 02:54:28,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 02:54:28,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 02:54:28,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 02:54:28,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 02:54:28,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 02:54:28,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 02:54:28,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 02:54:28,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 02:54:28,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 02:54:28,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 02:54:28,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 02:54:28,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 02:54:28,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 02:54:28,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 02:54:28,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 02:54:28,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 02:54:28,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 02:54:28,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 02:54:28,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 02:54:28,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 02:54:28,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 02:54:28,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 02:54:28,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 02:54:28,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 02:54:28,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 02:54:28,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 02:54:28,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 02:54:28,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 02:54:28,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 02:54:28,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 02:54:28,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 02:54:28,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 02:54:28,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 02:54:28,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 02:54:28,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 02:54:28,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 02:54:28,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 02:54:28,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 02:54:28,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 02:54:28,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 02:54:28,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 02:54:28,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 02:54:28,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 02:54:28,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 02:54:28,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 02:54:28,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 02:54:28,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 02:54:28,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 02:54:28,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 02:54:28,317 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 02:54:28,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 02:54:28,318 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 02:54:28,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 02:54:28,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 02:54:28,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 02:54:28,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 02:54:28,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 02:54:28,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 02:54:28,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 02:54:28,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 02:54:28,320 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 02:54:28,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 02:54:28,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 02:54:28,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 02:54:28,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 02:54:28,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:54:28,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 02:54:28,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 02:54:28,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 02:54:28,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 02:54:28,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 02:54:28,322 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 02:54:28,322 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 02:54:28,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 02:54:28,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 02:54:28,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 [2021-12-17 02:54:28,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 02:54:28,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 02:54:28,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 02:54:28,582 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 02:54:28,583 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 02:54:28,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2021-12-17 02:54:28,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/350a474ee/3522b773c1f841149f259830f590b632/FLAGc61d53887 [2021-12-17 02:54:29,278 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 02:54:29,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2021-12-17 02:54:29,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/350a474ee/3522b773c1f841149f259830f590b632/FLAGc61d53887 [2021-12-17 02:54:29,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/350a474ee/3522b773c1f841149f259830f590b632 [2021-12-17 02:54:29,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 02:54:29,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 02:54:29,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 02:54:29,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 02:54:29,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 02:54:29,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:54:29" (1/1) ... [2021-12-17 02:54:29,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7073fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:29, skipping insertion in model container [2021-12-17 02:54:29,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:54:29" (1/1) ... [2021-12-17 02:54:29,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 02:54:29,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 02:54:30,284 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/diskperf.i.cil-1.c[84645,84658] [2021-12-17 02:54:30,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:54:30,608 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 02:54:30,686 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/diskperf.i.cil-1.c[84645,84658] [2021-12-17 02:54:30,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:54:30,904 INFO L208 MainTranslator]: Completed translation [2021-12-17 02:54:30,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30 WrapperNode [2021-12-17 02:54:30,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 02:54:30,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 02:54:30,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 02:54:30,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 02:54:30,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30" (1/1) ... [2021-12-17 02:54:30,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30" (1/1) ... [2021-12-17 02:54:31,088 INFO L137 Inliner]: procedures = 127, calls = 1459, calls flagged for inlining = 20, calls inlined = 18, statements flattened = 3749 [2021-12-17 02:54:31,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 02:54:31,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 02:54:31,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 02:54:31,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 02:54:31,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30" (1/1) ... [2021-12-17 02:54:31,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30" (1/1) ... [2021-12-17 02:54:31,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30" (1/1) ... [2021-12-17 02:54:31,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30" (1/1) ... [2021-12-17 02:54:31,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30" (1/1) ... [2021-12-17 02:54:31,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30" (1/1) ... [2021-12-17 02:54:31,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30" (1/1) ... [2021-12-17 02:54:31,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 02:54:31,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 02:54:31,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 02:54:31,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 02:54:31,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30" (1/1) ... [2021-12-17 02:54:31,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:54:31,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:54:31,341 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 02:54:31,351 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 02:54:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-17 02:54:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-17 02:54:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-17 02:54:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 02:54:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2021-12-17 02:54:31,378 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2021-12-17 02:54:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfSendToNextDriver [2021-12-17 02:54:31,379 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfSendToNextDriver [2021-12-17 02:54:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-17 02:54:31,379 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-17 02:54:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfAddCounters [2021-12-17 02:54:31,379 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfAddCounters [2021-12-17 02:54:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-17 02:54:31,379 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-17 02:54:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedDecrement [2021-12-17 02:54:31,380 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedDecrement [2021-12-17 02:54:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure IoWMIRegistrationControl [2021-12-17 02:54:31,380 INFO L138 BoogieDeclarations]: Found implementation of procedure IoWMIRegistrationControl [2021-12-17 02:54:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 02:54:31,380 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-17 02:54:31,380 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-17 02:54:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-17 02:54:31,381 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-17 02:54:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-17 02:54:31,381 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-17 02:54:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 02:54:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 02:54:31,381 INFO L130 BoogieDeclarations]: Found specification of procedure KeQuerySystemTime [2021-12-17 02:54:31,382 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQuerySystemTime [2021-12-17 02:54:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 02:54:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 02:54:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-17 02:54:31,382 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-17 02:54:31,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 02:54:31,383 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2021-12-17 02:54:31,383 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2021-12-17 02:54:31,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 02:54:31,383 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfLogError [2021-12-17 02:54:31,383 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfLogError [2021-12-17 02:54:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-17 02:54:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure KeQueryPerformanceCounter [2021-12-17 02:54:31,384 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQueryPerformanceCounter [2021-12-17 02:54:31,384 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedIncrement [2021-12-17 02:54:31,384 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedIncrement [2021-12-17 02:54:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-17 02:54:31,385 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-17 02:54:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-12-17 02:54:31,385 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-12-17 02:54:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2021-12-17 02:54:31,386 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2021-12-17 02:54:31,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 02:54:31,386 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2021-12-17 02:54:31,386 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2021-12-17 02:54:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2021-12-17 02:54:31,387 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2021-12-17 02:54:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-17 02:54:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-17 02:54:31,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-17 02:54:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 02:54:31,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 02:54:32,074 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 02:54:32,076 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 02:54:32,208 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:32,222 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-17 02:54:32,222 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-17 02:54:32,290 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:32,301 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-17 02:54:32,302 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-17 02:54:32,728 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:32,750 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-17 02:54:32,750 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-17 02:54:32,912 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:32,915 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:54:32,924 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:55:11,592 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##61: assume false; [2021-12-17 02:55:11,592 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##62: assume !false; [2021-12-17 02:55:11,592 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##129: assume !false; [2021-12-17 02:55:11,592 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##128: assume false; [2021-12-17 02:55:11,592 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume !false; [2021-12-17 02:55:11,592 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##34: assume false; [2021-12-17 02:55:11,604 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 02:55:11,612 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 02:55:11,613 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 02:55:11,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:55:11 BoogieIcfgContainer [2021-12-17 02:55:11,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 02:55:11,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 02:55:11,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 02:55:11,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 02:55:11,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:54:29" (1/3) ... [2021-12-17 02:55:11,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126690d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:55:11, skipping insertion in model container [2021-12-17 02:55:11,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:54:30" (2/3) ... [2021-12-17 02:55:11,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126690d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:55:11, skipping insertion in model container [2021-12-17 02:55:11,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:55:11" (3/3) ... [2021-12-17 02:55:11,622 INFO L111 eAbstractionObserver]: Analyzing ICFG diskperf.i.cil-1.c [2021-12-17 02:55:11,627 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 02:55:11,627 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 02:55:11,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 02:55:11,692 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 02:55:11,692 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 02:55:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 292 states have internal predecessors, (389), 80 states have call successors, (80), 22 states have call predecessors, (80), 22 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-17 02:55:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-17 02:55:11,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:11,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:55:11,726 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:11,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:11,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2013573229, now seen corresponding path program 1 times [2021-12-17 02:55:11,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:11,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448593632] [2021-12-17 02:55:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:11,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:55:13,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:13,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448593632] [2021-12-17 02:55:13,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448593632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:13,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:13,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 02:55:13,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397780335] [2021-12-17 02:55:13,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:13,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 02:55:13,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:13,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 02:55:13,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:55:13,345 INFO L87 Difference]: Start difference. First operand has 378 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 292 states have internal predecessors, (389), 80 states have call successors, (80), 22 states have call predecessors, (80), 22 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 02:55:13,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:13,443 INFO L93 Difference]: Finished difference Result 750 states and 1130 transitions. [2021-12-17 02:55:13,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 02:55:13,446 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 17 [2021-12-17 02:55:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:13,454 INFO L225 Difference]: With dead ends: 750 [2021-12-17 02:55:13,454 INFO L226 Difference]: Without dead ends: 371 [2021-12-17 02:55:13,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:55:13,462 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:13,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:55:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-17 02:55:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2021-12-17 02:55:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 269 states have (on average 1.3605947955390334) internal successors, (366), 285 states have internal predecessors, (366), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-17 02:55:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 512 transitions. [2021-12-17 02:55:13,522 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 512 transitions. Word has length 17 [2021-12-17 02:55:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:13,522 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 512 transitions. [2021-12-17 02:55:13,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 02:55:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 512 transitions. [2021-12-17 02:55:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 02:55:13,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:13,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:55:13,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 02:55:13,524 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:13,525 INFO L85 PathProgramCache]: Analyzing trace with hash -6791183, now seen corresponding path program 1 times [2021-12-17 02:55:13,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:13,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258153825] [2021-12-17 02:55:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:13,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:14,666 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 02:55:14,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:14,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258153825] [2021-12-17 02:55:14,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258153825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:14,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:14,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:55:14,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239076676] [2021-12-17 02:55:14,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:14,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:55:14,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:55:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:55:14,671 INFO L87 Difference]: Start difference. First operand 371 states and 512 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:55:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:14,796 INFO L93 Difference]: Finished difference Result 744 states and 1027 transitions. [2021-12-17 02:55:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:55:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-17 02:55:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:14,800 INFO L225 Difference]: With dead ends: 744 [2021-12-17 02:55:14,800 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 02:55:14,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:55:14,803 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 2 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:14,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1516 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:55:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 02:55:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2021-12-17 02:55:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 273 states have (on average 1.3553113553113554) internal successors, (370), 289 states have internal predecessors, (370), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-17 02:55:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 516 transitions. [2021-12-17 02:55:14,835 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 516 transitions. Word has length 19 [2021-12-17 02:55:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:14,837 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 516 transitions. [2021-12-17 02:55:14,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:55:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 516 transitions. [2021-12-17 02:55:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 02:55:14,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:14,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:55:14,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 02:55:14,840 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:14,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1840508881, now seen corresponding path program 1 times [2021-12-17 02:55:14,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:14,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845923603] [2021-12-17 02:55:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:14,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:55:18,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:18,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845923603] [2021-12-17 02:55:18,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845923603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:18,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:18,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:55:18,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337153299] [2021-12-17 02:55:18,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:18,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:55:18,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:18,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:55:18,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:55:18,073 INFO L87 Difference]: Start difference. First operand 375 states and 516 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 02:55:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:18,244 INFO L93 Difference]: Finished difference Result 395 states and 542 transitions. [2021-12-17 02:55:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:55:18,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2021-12-17 02:55:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:18,250 INFO L225 Difference]: With dead ends: 395 [2021-12-17 02:55:18,250 INFO L226 Difference]: Without dead ends: 375 [2021-12-17 02:55:18,251 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 02:55:18,254 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 12 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:18,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 965 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 02:55:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-17 02:55:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2021-12-17 02:55:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 273 states have (on average 1.3516483516483517) internal successors, (369), 289 states have internal predecessors, (369), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-17 02:55:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 515 transitions. [2021-12-17 02:55:18,285 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 515 transitions. Word has length 23 [2021-12-17 02:55:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:18,285 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 515 transitions. [2021-12-17 02:55:18,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 02:55:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 515 transitions. [2021-12-17 02:55:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 02:55:18,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:18,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:55:18,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 02:55:18,288 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2125296181, now seen corresponding path program 1 times [2021-12-17 02:55:18,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:18,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927482828] [2021-12-17 02:55:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:18,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:55:21,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:21,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927482828] [2021-12-17 02:55:21,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927482828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:21,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:21,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:55:21,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483874470] [2021-12-17 02:55:21,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:21,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:55:21,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:21,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:55:21,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:55:21,215 INFO L87 Difference]: Start difference. First operand 375 states and 515 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 02:55:23,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:23,550 INFO L93 Difference]: Finished difference Result 869 states and 1216 transitions. [2021-12-17 02:55:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:55:23,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 25 [2021-12-17 02:55:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:23,555 INFO L225 Difference]: With dead ends: 869 [2021-12-17 02:55:23,555 INFO L226 Difference]: Without dead ends: 614 [2021-12-17 02:55:23,557 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 02:55:23,557 INFO L933 BasicCegarLoop]: 715 mSDtfsCounter, 431 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:23,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 1066 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 02:55:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-12-17 02:55:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 594. [2021-12-17 02:55:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 435 states have (on average 1.335632183908046) internal successors, (581), 445 states have internal predecessors, (581), 120 states have call successors, (120), 39 states have call predecessors, (120), 38 states have return successors, (129), 113 states have call predecessors, (129), 109 states have call successors, (129) [2021-12-17 02:55:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 830 transitions. [2021-12-17 02:55:23,584 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 830 transitions. Word has length 25 [2021-12-17 02:55:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:23,584 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 830 transitions. [2021-12-17 02:55:23,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 02:55:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 830 transitions. [2021-12-17 02:55:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 02:55:23,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:23,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:55:23,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 02:55:23,587 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:23,587 INFO L85 PathProgramCache]: Analyzing trace with hash -642930051, now seen corresponding path program 1 times [2021-12-17 02:55:23,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:23,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625674741] [2021-12-17 02:55:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:23,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:55:26,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:26,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625674741] [2021-12-17 02:55:26,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625674741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:26,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:26,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:55:26,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919890237] [2021-12-17 02:55:26,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:26,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:55:26,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:26,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:55:26,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:55:26,308 INFO L87 Difference]: Start difference. First operand 594 states and 830 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 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 02:55:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:26,428 INFO L93 Difference]: Finished difference Result 1408 states and 2008 transitions. [2021-12-17 02:55:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:55:26,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 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 33 [2021-12-17 02:55:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:26,435 INFO L225 Difference]: With dead ends: 1408 [2021-12-17 02:55:26,435 INFO L226 Difference]: Without dead ends: 945 [2021-12-17 02:55:26,437 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 02:55:26,439 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 421 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:26,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 924 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:55:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-12-17 02:55:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 915. [2021-12-17 02:55:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 663 states have (on average 1.3423831070889893) internal successors, (890), 674 states have internal predecessors, (890), 189 states have call successors, (189), 62 states have call predecessors, (189), 62 states have return successors, (223), 183 states have call predecessors, (223), 179 states have call successors, (223) [2021-12-17 02:55:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1302 transitions. [2021-12-17 02:55:26,492 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1302 transitions. Word has length 33 [2021-12-17 02:55:26,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:26,493 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1302 transitions. [2021-12-17 02:55:26,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 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 02:55:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1302 transitions. [2021-12-17 02:55:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 02:55:26,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:26,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:55:26,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 02:55:26,497 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:26,498 INFO L85 PathProgramCache]: Analyzing trace with hash 401969732, now seen corresponding path program 1 times [2021-12-17 02:55:26,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:26,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264511750] [2021-12-17 02:55:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:26,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:55:28,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:28,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264511750] [2021-12-17 02:55:28,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264511750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:28,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:28,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:55:28,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430135624] [2021-12-17 02:55:28,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:28,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:55:28,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:55:28,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:55:28,748 INFO L87 Difference]: Start difference. First operand 915 states and 1302 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:55:30,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:30,997 INFO L93 Difference]: Finished difference Result 929 states and 1321 transitions. [2021-12-17 02:55:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:55:30,998 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), 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 33 [2021-12-17 02:55:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:31,002 INFO L225 Difference]: With dead ends: 929 [2021-12-17 02:55:31,003 INFO L226 Difference]: Without dead ends: 925 [2021-12-17 02:55:31,003 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 02:55:31,007 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 28 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:31,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 909 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 02:55:31,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-12-17 02:55:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2021-12-17 02:55:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 673 states have (on average 1.3417533432392272) internal successors, (903), 682 states have internal predecessors, (903), 188 states have call successors, (188), 63 states have call predecessors, (188), 62 states have return successors, (223), 183 states have call predecessors, (223), 179 states have call successors, (223) [2021-12-17 02:55:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1314 transitions. [2021-12-17 02:55:31,043 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1314 transitions. Word has length 33 [2021-12-17 02:55:31,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:31,044 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1314 transitions. [2021-12-17 02:55:31,044 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), 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 02:55:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1314 transitions. [2021-12-17 02:55:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 02:55:31,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:31,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:55:31,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 02:55:31,048 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:31,049 INFO L85 PathProgramCache]: Analyzing trace with hash 937185154, now seen corresponding path program 1 times [2021-12-17 02:55:31,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:31,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535822244] [2021-12-17 02:55:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:31,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:33,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:55:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:55:33,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:33,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535822244] [2021-12-17 02:55:33,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535822244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:33,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:33,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:55:33,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890476689] [2021-12-17 02:55:33,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:33,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:55:33,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:33,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:55:33,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:55:33,559 INFO L87 Difference]: Start difference. First operand 924 states and 1314 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 02:55:35,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:37,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:40,257 INFO L93 Difference]: Finished difference Result 981 states and 1395 transitions. [2021-12-17 02:55:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:55:40,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 37 [2021-12-17 02:55:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:40,269 INFO L225 Difference]: With dead ends: 981 [2021-12-17 02:55:40,269 INFO L226 Difference]: Without dead ends: 970 [2021-12-17 02:55:40,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:55:40,270 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 648 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 138 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:40,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1084 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 665 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2021-12-17 02:55:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-12-17 02:55:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 948. [2021-12-17 02:55:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 695 states have (on average 1.3410071942446042) internal successors, (932), 706 states have internal predecessors, (932), 188 states have call successors, (188), 63 states have call predecessors, (188), 64 states have return successors, (232), 183 states have call predecessors, (232), 179 states have call successors, (232) [2021-12-17 02:55:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1352 transitions. [2021-12-17 02:55:40,307 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1352 transitions. Word has length 37 [2021-12-17 02:55:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:40,308 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1352 transitions. [2021-12-17 02:55:40,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 02:55:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1352 transitions. [2021-12-17 02:55:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 02:55:40,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:40,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:55:40,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 02:55:40,309 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:40,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1448171803, now seen corresponding path program 1 times [2021-12-17 02:55:40,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:40,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609586379] [2021-12-17 02:55:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:40,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:42,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:55:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:55:42,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:42,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609586379] [2021-12-17 02:55:42,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609586379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:42,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:42,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:55:42,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416944970] [2021-12-17 02:55:42,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:42,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:55:42,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:55:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:55:42,899 INFO L87 Difference]: Start difference. First operand 948 states and 1352 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 02:55:45,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:47,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:48,557 INFO L93 Difference]: Finished difference Result 972 states and 1380 transitions. [2021-12-17 02:55:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:55:48,558 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 38 [2021-12-17 02:55:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:48,563 INFO L225 Difference]: With dead ends: 972 [2021-12-17 02:55:48,563 INFO L226 Difference]: Without dead ends: 964 [2021-12-17 02:55:48,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:55:48,564 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 637 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 134 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:48,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 1078 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 661 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-12-17 02:55:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-12-17 02:55:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 948. [2021-12-17 02:55:48,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 695 states have (on average 1.339568345323741) internal successors, (931), 706 states have internal predecessors, (931), 188 states have call successors, (188), 63 states have call predecessors, (188), 64 states have return successors, (232), 183 states have call predecessors, (232), 179 states have call successors, (232) [2021-12-17 02:55:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1351 transitions. [2021-12-17 02:55:48,598 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1351 transitions. Word has length 38 [2021-12-17 02:55:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:48,598 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1351 transitions. [2021-12-17 02:55:48,598 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 02:55:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1351 transitions. [2021-12-17 02:55:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 02:55:48,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:48,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:55:48,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 02:55:48,600 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:48,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2084178201, now seen corresponding path program 1 times [2021-12-17 02:55:48,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:48,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879131465] [2021-12-17 02:55:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:48,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:50,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:55:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:55:50,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:50,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879131465] [2021-12-17 02:55:50,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879131465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:50,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:50,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:55:50,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901218056] [2021-12-17 02:55:50,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:50,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:55:50,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:55:50,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:55:50,810 INFO L87 Difference]: Start difference. First operand 948 states and 1351 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 02:55:52,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:55:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:55:53,824 INFO L93 Difference]: Finished difference Result 1745 states and 2521 transitions. [2021-12-17 02:55:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:55:53,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 39 [2021-12-17 02:55:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:55:53,834 INFO L225 Difference]: With dead ends: 1745 [2021-12-17 02:55:53,834 INFO L226 Difference]: Without dead ends: 1716 [2021-12-17 02:55:53,835 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 02:55:53,836 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 674 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 137 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 02:55:53,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 1130 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 02:55:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-12-17 02:55:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1677. [2021-12-17 02:55:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1218 states have (on average 1.348111658456486) internal successors, (1642), 1233 states have internal predecessors, (1642), 338 states have call successors, (338), 119 states have call predecessors, (338), 120 states have return successors, (446), 334 states have call predecessors, (446), 329 states have call successors, (446) [2021-12-17 02:55:53,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2426 transitions. [2021-12-17 02:55:53,899 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2426 transitions. Word has length 39 [2021-12-17 02:55:53,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:55:53,899 INFO L470 AbstractCegarLoop]: Abstraction has 1677 states and 2426 transitions. [2021-12-17 02:55:53,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 02:55:53,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2426 transitions. [2021-12-17 02:55:53,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 02:55:53,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:55:53,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:55:53,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 02:55:53,901 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:55:53,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:55:53,901 INFO L85 PathProgramCache]: Analyzing trace with hash 193456973, now seen corresponding path program 1 times [2021-12-17 02:55:53,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:55:53,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277350254] [2021-12-17 02:55:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:55:53,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:55:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:55,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:55:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:55:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:55:55,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:55:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277350254] [2021-12-17 02:55:55,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277350254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:55:55,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:55:55,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:55:55,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63745663] [2021-12-17 02:55:55,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:55:55,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:55:55,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:55:55,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:55:55,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:55:55,983 INFO L87 Difference]: Start difference. First operand 1677 states and 2426 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 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 02:55:58,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:00,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:01,400 INFO L93 Difference]: Finished difference Result 1710 states and 2471 transitions. [2021-12-17 02:56:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:56:01,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 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 40 [2021-12-17 02:56:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:01,408 INFO L225 Difference]: With dead ends: 1710 [2021-12-17 02:56:01,408 INFO L226 Difference]: Without dead ends: 1692 [2021-12-17 02:56:01,409 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 02:56:01,410 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 152 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 71 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:01,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 1415 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 361 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2021-12-17 02:56:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-12-17 02:56:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1673. [2021-12-17 02:56:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1215 states have (on average 1.348148148148148) internal successors, (1638), 1230 states have internal predecessors, (1638), 337 states have call successors, (337), 119 states have call predecessors, (337), 120 states have return successors, (445), 333 states have call predecessors, (445), 328 states have call successors, (445) [2021-12-17 02:56:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2420 transitions. [2021-12-17 02:56:01,484 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2420 transitions. Word has length 40 [2021-12-17 02:56:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:01,484 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 2420 transitions. [2021-12-17 02:56:01,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 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 02:56:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2420 transitions. [2021-12-17 02:56:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 02:56:01,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:01,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:01,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 02:56:01,486 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1037165454, now seen corresponding path program 1 times [2021-12-17 02:56:01,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:01,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685194440] [2021-12-17 02:56:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:01,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:03,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 02:56:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 02:56:03,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685194440] [2021-12-17 02:56:03,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685194440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:03,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:03,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:56:03,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337535686] [2021-12-17 02:56:03,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:03,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:56:03,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:56:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:56:03,756 INFO L87 Difference]: Start difference. First operand 1673 states and 2420 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:56:05,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:08,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:10,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:12,352 INFO L93 Difference]: Finished difference Result 2633 states and 4035 transitions. [2021-12-17 02:56:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 02:56:12,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-12-17 02:56:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:12,367 INFO L225 Difference]: With dead ends: 2633 [2021-12-17 02:56:12,367 INFO L226 Difference]: Without dead ends: 2625 [2021-12-17 02:56:12,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:56:12,369 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 425 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 138 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:12,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 1112 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 604 Invalid, 3 Unknown, 0 Unchecked, 8.4s Time] [2021-12-17 02:56:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-12-17 02:56:12,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1815. [2021-12-17 02:56:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1317 states have (on average 1.3500379650721337) internal successors, (1778), 1336 states have internal predecessors, (1778), 365 states have call successors, (365), 128 states have call predecessors, (365), 132 states have return successors, (494), 360 states have call predecessors, (494), 356 states have call successors, (494) [2021-12-17 02:56:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2637 transitions. [2021-12-17 02:56:12,468 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2637 transitions. Word has length 43 [2021-12-17 02:56:12,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:12,468 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 2637 transitions. [2021-12-17 02:56:12,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:56:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2637 transitions. [2021-12-17 02:56:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 02:56:12,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:12,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:12,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 02:56:12,470 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1937989103, now seen corresponding path program 1 times [2021-12-17 02:56:12,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:12,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986465649] [2021-12-17 02:56:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:12,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:14,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 02:56:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 02:56:14,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:14,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986465649] [2021-12-17 02:56:14,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986465649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:56:14,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660317629] [2021-12-17 02:56:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:14,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:56:14,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:56:14,696 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 02:56:14,699 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 02:56:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:22,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 19440 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 02:56:22,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:56:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 02:56:22,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:56:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 02:56:22,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660317629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:56:22,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:56:22,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2021-12-17 02:56:22,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100459649] [2021-12-17 02:56:22,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:56:22,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:56:22,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:22,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:56:22,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:56:22,828 INFO L87 Difference]: Start difference. First operand 1815 states and 2637 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:25,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:27,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:29,442 INFO L93 Difference]: Finished difference Result 4528 states and 6798 transitions. [2021-12-17 02:56:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:56:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-17 02:56:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:29,458 INFO L225 Difference]: With dead ends: 4528 [2021-12-17 02:56:29,458 INFO L226 Difference]: Without dead ends: 2719 [2021-12-17 02:56:29,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:56:29,465 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 508 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 143 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:29,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1485 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 647 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2021-12-17 02:56:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-12-17 02:56:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 1825. [2021-12-17 02:56:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1327 states have (on average 1.3474001507159006) internal successors, (1788), 1346 states have internal predecessors, (1788), 365 states have call successors, (365), 128 states have call predecessors, (365), 132 states have return successors, (494), 360 states have call predecessors, (494), 356 states have call successors, (494) [2021-12-17 02:56:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2647 transitions. [2021-12-17 02:56:29,561 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2647 transitions. Word has length 44 [2021-12-17 02:56:29,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:29,562 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 2647 transitions. [2021-12-17 02:56:29,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2647 transitions. [2021-12-17 02:56:29,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 02:56:29,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:29,564 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:29,655 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 02:56:29,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 02:56:29,792 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash -260205666, now seen corresponding path program 2 times [2021-12-17 02:56:29,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:29,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392245673] [2021-12-17 02:56:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:29,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:32,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 02:56:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 02:56:32,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:32,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392245673] [2021-12-17 02:56:32,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392245673] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:56:32,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767452576] [2021-12-17 02:56:32,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:56:32,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:56:32,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:56:32,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:56:32,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 02:56:40,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 02:56:40,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:56:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 19416 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 02:56:40,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:56:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:56:40,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:56:40,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767452576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:40,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 02:56:40,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-17 02:56:40,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916296941] [2021-12-17 02:56:40,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:40,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:56:40,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:56:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:56:40,721 INFO L87 Difference]: Start difference. First operand 1825 states and 2647 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:56:42,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:43,010 INFO L93 Difference]: Finished difference Result 1855 states and 2679 transitions. [2021-12-17 02:56:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:56:43,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-17 02:56:43,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:43,018 INFO L225 Difference]: With dead ends: 1855 [2021-12-17 02:56:43,019 INFO L226 Difference]: Without dead ends: 1823 [2021-12-17 02:56:43,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:56:43,020 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 39 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:43,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1896 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 02:56:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-12-17 02:56:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1823. [2021-12-17 02:56:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1326 states have (on average 1.3461538461538463) internal successors, (1785), 1345 states have internal predecessors, (1785), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2021-12-17 02:56:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2642 transitions. [2021-12-17 02:56:43,095 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2642 transitions. Word has length 54 [2021-12-17 02:56:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:43,095 INFO L470 AbstractCegarLoop]: Abstraction has 1823 states and 2642 transitions. [2021-12-17 02:56:43,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:56:43,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2642 transitions. [2021-12-17 02:56:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 02:56:43,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:43,096 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:43,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 02:56:43,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 02:56:43,311 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:43,312 INFO L85 PathProgramCache]: Analyzing trace with hash 462825716, now seen corresponding path program 1 times [2021-12-17 02:56:43,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:43,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804100840] [2021-12-17 02:56:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:43,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:45,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 02:56:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:56:45,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:45,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804100840] [2021-12-17 02:56:45,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804100840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:45,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:45,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:56:45,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76088882] [2021-12-17 02:56:45,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:45,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:56:45,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:56:45,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:56:45,601 INFO L87 Difference]: Start difference. First operand 1823 states and 2642 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:56:47,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:49,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:51,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:55,601 INFO L93 Difference]: Finished difference Result 2645 states and 4042 transitions. [2021-12-17 02:56:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:56:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-17 02:56:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:55,615 INFO L225 Difference]: With dead ends: 2645 [2021-12-17 02:56:55,615 INFO L226 Difference]: Without dead ends: 2637 [2021-12-17 02:56:55,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:56:55,617 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 1172 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 477 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:55,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 1217 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 983 Invalid, 3 Unknown, 0 Unchecked, 9.6s Time] [2021-12-17 02:56:55,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-12-17 02:56:55,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1823. [2021-12-17 02:56:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1326 states have (on average 1.345399698340875) internal successors, (1784), 1345 states have internal predecessors, (1784), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2021-12-17 02:56:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2641 transitions. [2021-12-17 02:56:55,715 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2641 transitions. Word has length 54 [2021-12-17 02:56:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:55,715 INFO L470 AbstractCegarLoop]: Abstraction has 1823 states and 2641 transitions. [2021-12-17 02:56:55,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 02:56:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2641 transitions. [2021-12-17 02:56:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 02:56:55,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:55,716 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:55,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 02:56:55,717 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:55,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash 565671181, now seen corresponding path program 1 times [2021-12-17 02:56:55,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:55,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176019965] [2021-12-17 02:56:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:55,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:57,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 02:56:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:56:57,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:57,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176019965] [2021-12-17 02:56:57,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176019965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:57,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:57,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:56:57,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564783217] [2021-12-17 02:56:57,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:57,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:56:57,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:56:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:56:57,997 INFO L87 Difference]: Start difference. First operand 1823 states and 2641 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 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 02:57:00,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:02,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:04,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:06,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:08,555 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:10,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:12,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:14,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:18,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:18,689 INFO L93 Difference]: Finished difference Result 1992 states and 2980 transitions. [2021-12-17 02:57:18,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:57:18,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 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 55 [2021-12-17 02:57:18,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:18,699 INFO L225 Difference]: With dead ends: 1992 [2021-12-17 02:57:18,699 INFO L226 Difference]: Without dead ends: 1988 [2021-12-17 02:57:18,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:57:18,700 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 91 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 75 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:18,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 2408 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1042 Invalid, 8 Unknown, 0 Unchecked, 20.5s Time] [2021-12-17 02:57:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-12-17 02:57:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1830. [2021-12-17 02:57:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1333 states have (on average 1.3443360840210052) internal successors, (1792), 1352 states have internal predecessors, (1792), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2021-12-17 02:57:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2649 transitions. [2021-12-17 02:57:18,788 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2649 transitions. Word has length 55 [2021-12-17 02:57:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:18,789 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 2649 transitions. [2021-12-17 02:57:18,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 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 02:57:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2649 transitions. [2021-12-17 02:57:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 02:57:18,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:18,790 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:18,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 02:57:18,790 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash 565394351, now seen corresponding path program 1 times [2021-12-17 02:57:18,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:18,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782698164] [2021-12-17 02:57:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:18,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:21,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 02:57:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:57:21,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:21,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782698164] [2021-12-17 02:57:21,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782698164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:21,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:21,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:57:21,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430883462] [2021-12-17 02:57:21,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:21,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:57:21,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:57:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:57:21,257 INFO L87 Difference]: Start difference. First operand 1830 states and 2649 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 02:57:23,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:25,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:27,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:30,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-17 02:57:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:33,270 INFO L93 Difference]: Finished difference Result 2646 states and 4042 transitions. [2021-12-17 02:57:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:57:33,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 55 [2021-12-17 02:57:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:33,283 INFO L225 Difference]: With dead ends: 2646 [2021-12-17 02:57:33,284 INFO L226 Difference]: Without dead ends: 2630 [2021-12-17 02:57:33,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:57:33,285 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 1155 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 474 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:33,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 1218 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 981 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2021-12-17 02:57:33,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2021-12-17 02:57:33,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 1822. [2021-12-17 02:57:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1326 states have (on average 1.3446455505279036) internal successors, (1783), 1345 states have internal predecessors, (1783), 363 states have call successors, (363), 128 states have call predecessors, (363), 132 states have return successors, (492), 358 states have call predecessors, (492), 354 states have call successors, (492) [2021-12-17 02:57:33,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2638 transitions. [2021-12-17 02:57:33,386 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2638 transitions. Word has length 55 [2021-12-17 02:57:33,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:33,386 INFO L470 AbstractCegarLoop]: Abstraction has 1822 states and 2638 transitions. [2021-12-17 02:57:33,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 02:57:33,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2638 transitions. [2021-12-17 02:57:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 02:57:33,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:33,388 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:33,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 02:57:33,388 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:33,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:33,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1051370444, now seen corresponding path program 1 times [2021-12-17 02:57:33,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:33,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087893728] [2021-12-17 02:57:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:33,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:57:35,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:35,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087893728] [2021-12-17 02:57:35,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087893728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:35,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:35,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:57:35,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548575515] [2021-12-17 02:57:35,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:35,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:57:35,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:35,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:57:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:57:35,754 INFO L87 Difference]: Start difference. First operand 1822 states and 2638 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 02:57:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:36,478 INFO L93 Difference]: Finished difference Result 1849 states and 2663 transitions. [2021-12-17 02:57:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:57:36,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 54 [2021-12-17 02:57:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:36,486 INFO L225 Difference]: With dead ends: 1849 [2021-12-17 02:57:36,486 INFO L226 Difference]: Without dead ends: 1825 [2021-12-17 02:57:36,487 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 02:57:36,488 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 478 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:36,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 752 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 02:57:36,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-12-17 02:57:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1814. [2021-12-17 02:57:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1319 states have (on average 1.3449583017437452) internal successors, (1774), 1339 states have internal predecessors, (1774), 363 states have call successors, (363), 128 states have call predecessors, (363), 131 states have return successors, (490), 356 states have call predecessors, (490), 354 states have call successors, (490) [2021-12-17 02:57:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2627 transitions. [2021-12-17 02:57:36,574 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2627 transitions. Word has length 54 [2021-12-17 02:57:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:36,575 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 2627 transitions. [2021-12-17 02:57:36,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 02:57:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2627 transitions. [2021-12-17 02:57:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 02:57:36,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:36,576 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:36,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 02:57:36,577 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:36,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1727279395, now seen corresponding path program 1 times [2021-12-17 02:57:36,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:36,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108968492] [2021-12-17 02:57:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:36,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:57:38,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:38,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108968492] [2021-12-17 02:57:38,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108968492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:38,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:38,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:57:38,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739635707] [2021-12-17 02:57:38,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:38,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:57:38,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:57:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:57:38,751 INFO L87 Difference]: Start difference. First operand 1814 states and 2627 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 02:57:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:39,576 INFO L93 Difference]: Finished difference Result 1852 states and 2668 transitions. [2021-12-17 02:57:39,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:57:39,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 54 [2021-12-17 02:57:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:39,583 INFO L225 Difference]: With dead ends: 1852 [2021-12-17 02:57:39,583 INFO L226 Difference]: Without dead ends: 1815 [2021-12-17 02:57:39,584 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 02:57:39,585 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 465 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:39,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 761 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 02:57:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-12-17 02:57:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1813. [2021-12-17 02:57:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1318 states have (on average 1.3429438543247345) internal successors, (1770), 1338 states have internal predecessors, (1770), 363 states have call successors, (363), 128 states have call predecessors, (363), 131 states have return successors, (489), 356 states have call predecessors, (489), 354 states have call successors, (489) [2021-12-17 02:57:39,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2622 transitions. [2021-12-17 02:57:39,730 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2622 transitions. Word has length 54 [2021-12-17 02:57:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:39,731 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 2622 transitions. [2021-12-17 02:57:39,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 02:57:39,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2622 transitions. [2021-12-17 02:57:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 02:57:39,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:39,737 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:39,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 02:57:39,737 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:39,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:39,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1993698781, now seen corresponding path program 1 times [2021-12-17 02:57:39,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:39,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747610964] [2021-12-17 02:57:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:39,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:57:41,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:41,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747610964] [2021-12-17 02:57:41,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747610964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:41,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:41,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:57:41,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977810345] [2021-12-17 02:57:41,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:41,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:57:41,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:41,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:57:41,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:57:41,938 INFO L87 Difference]: Start difference. First operand 1813 states and 2622 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 02:57:44,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:44,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:44,353 INFO L93 Difference]: Finished difference Result 2552 states and 3800 transitions. [2021-12-17 02:57:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:57:44,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 54 [2021-12-17 02:57:44,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:44,362 INFO L225 Difference]: With dead ends: 2552 [2021-12-17 02:57:44,362 INFO L226 Difference]: Without dead ends: 2539 [2021-12-17 02:57:44,363 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 02:57:44,363 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 321 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:44,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 1173 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 02:57:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-12-17 02:57:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1813. [2021-12-17 02:57:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1318 states have (on average 1.3406676783004552) internal successors, (1767), 1338 states have internal predecessors, (1767), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2021-12-17 02:57:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2626 transitions. [2021-12-17 02:57:44,453 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2626 transitions. Word has length 54 [2021-12-17 02:57:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:44,453 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 2626 transitions. [2021-12-17 02:57:44,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 02:57:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2626 transitions. [2021-12-17 02:57:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 02:57:44,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:44,454 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:44,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 02:57:44,454 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:44,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:44,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2128531258, now seen corresponding path program 1 times [2021-12-17 02:57:44,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:44,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203384126] [2021-12-17 02:57:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:44,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:57:46,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:46,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203384126] [2021-12-17 02:57:46,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203384126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:46,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:46,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:57:46,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445296030] [2021-12-17 02:57:46,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:46,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:57:46,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:46,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:57:46,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:57:46,724 INFO L87 Difference]: Start difference. First operand 1813 states and 2626 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 02:57:48,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:51,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:53,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:55,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:57,084 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:57,368 INFO L93 Difference]: Finished difference Result 1827 states and 2641 transitions. [2021-12-17 02:57:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:57:57,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 55 [2021-12-17 02:57:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:57,374 INFO L225 Difference]: With dead ends: 1827 [2021-12-17 02:57:57,375 INFO L226 Difference]: Without dead ends: 1823 [2021-12-17 02:57:57,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:57:57,376 INFO L933 BasicCegarLoop]: 460 mSDtfsCounter, 42 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:57,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 2249 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 5 Unknown, 0 Unchecked, 10.5s Time] [2021-12-17 02:57:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-12-17 02:57:57,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1819. [2021-12-17 02:57:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1324 states have (on average 1.3398791540785497) internal successors, (1774), 1344 states have internal predecessors, (1774), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2021-12-17 02:57:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2633 transitions. [2021-12-17 02:57:57,461 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2633 transitions. Word has length 55 [2021-12-17 02:57:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:57,461 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2633 transitions. [2021-12-17 02:57:57,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 02:57:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2633 transitions. [2021-12-17 02:57:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 02:57:57,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:57,462 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:57,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 02:57:57,462 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:57,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:57,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2128254428, now seen corresponding path program 1 times [2021-12-17 02:57:57,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:57,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516758490] [2021-12-17 02:57:57,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:57,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:57:59,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:59,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516758490] [2021-12-17 02:57:59,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516758490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:59,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:59,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 02:57:59,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012402878] [2021-12-17 02:57:59,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:59,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 02:57:59,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:59,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 02:57:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 02:57:59,945 INFO L87 Difference]: Start difference. First operand 1819 states and 2633 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 02:58:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:00,953 INFO L93 Difference]: Finished difference Result 2547 states and 3793 transitions. [2021-12-17 02:58:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 02:58:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 55 [2021-12-17 02:58:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:00,959 INFO L225 Difference]: With dead ends: 2547 [2021-12-17 02:58:00,959 INFO L226 Difference]: Without dead ends: 2520 [2021-12-17 02:58:00,960 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 02:58:00,960 INFO L933 BasicCegarLoop]: 747 mSDtfsCounter, 665 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:00,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 1046 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 02:58:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-12-17 02:58:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1796. [2021-12-17 02:58:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1301 states have (on average 1.342044581091468) internal successors, (1746), 1321 states have internal predecessors, (1746), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2021-12-17 02:58:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2605 transitions. [2021-12-17 02:58:01,036 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2605 transitions. Word has length 55 [2021-12-17 02:58:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:01,036 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 2605 transitions. [2021-12-17 02:58:01,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 02:58:01,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2605 transitions. [2021-12-17 02:58:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 02:58:01,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:01,037 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:01,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 02:58:01,037 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:01,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2028226751, now seen corresponding path program 1 times [2021-12-17 02:58:01,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:01,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654944839] [2021-12-17 02:58:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:01,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:03,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 02:58:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:58:03,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:03,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654944839] [2021-12-17 02:58:03,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654944839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:03,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:03,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:58:03,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762711625] [2021-12-17 02:58:03,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:03,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:58:03,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:58:03,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:58:03,352 INFO L87 Difference]: Start difference. First operand 1796 states and 2605 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 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 02:58:05,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:07,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:09,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:11,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:13,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:15,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:17,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:19,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:24,241 INFO L93 Difference]: Finished difference Result 1956 states and 2933 transitions. [2021-12-17 02:58:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:58:24,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 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 57 [2021-12-17 02:58:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:24,248 INFO L225 Difference]: With dead ends: 1956 [2021-12-17 02:58:24,248 INFO L226 Difference]: Without dead ends: 1937 [2021-12-17 02:58:24,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:58:24,249 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 87 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 71 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:24,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 2210 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 994 Invalid, 8 Unknown, 0 Unchecked, 20.7s Time] [2021-12-17 02:58:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-12-17 02:58:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1783. [2021-12-17 02:58:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1289 states have (on average 1.343677269200931) internal successors, (1732), 1309 states have internal predecessors, (1732), 361 states have call successors, (361), 128 states have call predecessors, (361), 132 states have return successors, (496), 355 states have call predecessors, (496), 353 states have call successors, (496) [2021-12-17 02:58:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2589 transitions. [2021-12-17 02:58:24,347 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2589 transitions. Word has length 57 [2021-12-17 02:58:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:24,347 INFO L470 AbstractCegarLoop]: Abstraction has 1783 states and 2589 transitions. [2021-12-17 02:58:24,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 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 02:58:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2589 transitions. [2021-12-17 02:58:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 02:58:24,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:24,349 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:24,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 02:58:24,349 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:24,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1367138182, now seen corresponding path program 1 times [2021-12-17 02:58:24,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:24,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830920215] [2021-12-17 02:58:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:24,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:26,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 02:58:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:27,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:58:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:58:27,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:27,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830920215] [2021-12-17 02:58:27,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830920215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:27,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:27,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:58:27,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876223148] [2021-12-17 02:58:27,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:27,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:58:27,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:27,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:58:27,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:58:27,084 INFO L87 Difference]: Start difference. First operand 1783 states and 2589 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:58:29,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:31,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:33,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:35,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:37,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:39,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:41,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:43,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:45,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:47,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:52,891 INFO L93 Difference]: Finished difference Result 1939 states and 2913 transitions. [2021-12-17 02:58:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:58:52,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2021-12-17 02:58:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:52,898 INFO L225 Difference]: With dead ends: 1939 [2021-12-17 02:58:52,898 INFO L226 Difference]: Without dead ends: 1907 [2021-12-17 02:58:52,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:58:52,900 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 86 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 68 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2764 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:52,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 2764 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1287 Invalid, 10 Unknown, 0 Unchecked, 25.6s Time] [2021-12-17 02:58:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-12-17 02:58:52,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1750. [2021-12-17 02:58:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1261 states have (on average 1.3481363996827915) internal successors, (1700), 1280 states have internal predecessors, (1700), 358 states have call successors, (358), 126 states have call predecessors, (358), 130 states have return successors, (486), 353 states have call predecessors, (486), 351 states have call successors, (486) [2021-12-17 02:58:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2544 transitions. [2021-12-17 02:58:52,999 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2544 transitions. Word has length 65 [2021-12-17 02:58:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:53,000 INFO L470 AbstractCegarLoop]: Abstraction has 1750 states and 2544 transitions. [2021-12-17 02:58:53,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:58:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2544 transitions. [2021-12-17 02:58:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 02:58:53,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:53,002 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:58:53,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 02:58:53,003 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash 762385492, now seen corresponding path program 1 times [2021-12-17 02:58:53,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:53,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719793195] [2021-12-17 02:58:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:53,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:55,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 02:58:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:55,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 02:58:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:55,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 02:58:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:55,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 02:58:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:55,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 02:58:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:58:55,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:55,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719793195] [2021-12-17 02:58:55,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719793195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:55,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:55,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:58:55,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73317371] [2021-12-17 02:58:55,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:55,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:58:55,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:55,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:58:55,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:58:55,471 INFO L87 Difference]: Start difference. First operand 1750 states and 2544 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:58:57,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:59,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:01,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:04,638 INFO L93 Difference]: Finished difference Result 2002 states and 2973 transitions. [2021-12-17 02:59:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:59:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 83 [2021-12-17 02:59:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:04,644 INFO L225 Difference]: With dead ends: 2002 [2021-12-17 02:59:04,644 INFO L226 Difference]: Without dead ends: 1200 [2021-12-17 02:59:04,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:59:04,648 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 669 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 195 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:04,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 894 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 532 Invalid, 3 Unknown, 0 Unchecked, 8.9s Time] [2021-12-17 02:59:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-12-17 02:59:04,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1046. [2021-12-17 02:59:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 768 states have (on average 1.328125) internal successors, (1020), 782 states have internal predecessors, (1020), 195 states have call successors, (195), 78 states have call predecessors, (195), 82 states have return successors, (269), 192 states have call predecessors, (269), 188 states have call successors, (269) [2021-12-17 02:59:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1484 transitions. [2021-12-17 02:59:04,702 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1484 transitions. Word has length 83 [2021-12-17 02:59:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:04,702 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1484 transitions. [2021-12-17 02:59:04,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:59:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1484 transitions. [2021-12-17 02:59:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 02:59:04,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:04,704 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:59:04,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 02:59:04,704 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:04,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash -497708636, now seen corresponding path program 1 times [2021-12-17 02:59:04,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:04,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884450339] [2021-12-17 02:59:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:04,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:07,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 02:59:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:07,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 02:59:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:07,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 02:59:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:07,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 02:59:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:59:07,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:07,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884450339] [2021-12-17 02:59:07,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884450339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:07,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:07,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:59:07,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040541216] [2021-12-17 02:59:07,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:07,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:59:07,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:07,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:59:07,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:59:07,153 INFO L87 Difference]: Start difference. First operand 1046 states and 1484 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:59:09,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:11,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:13,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:15,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:17,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:20,662 INFO L93 Difference]: Finished difference Result 2210 states and 3299 transitions. [2021-12-17 02:59:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 02:59:20,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 73 [2021-12-17 02:59:20,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:20,666 INFO L225 Difference]: With dead ends: 2210 [2021-12-17 02:59:20,666 INFO L226 Difference]: Without dead ends: 1289 [2021-12-17 02:59:20,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:59:20,670 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 469 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 270 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:20,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 1211 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 648 Invalid, 5 Unknown, 0 Unchecked, 13.1s Time] [2021-12-17 02:59:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-12-17 02:59:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1067. [2021-12-17 02:59:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 789 states have (on average 1.3307984790874525) internal successors, (1050), 800 states have internal predecessors, (1050), 195 states have call successors, (195), 78 states have call predecessors, (195), 82 states have return successors, (269), 192 states have call predecessors, (269), 188 states have call successors, (269) [2021-12-17 02:59:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1514 transitions. [2021-12-17 02:59:20,767 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1514 transitions. Word has length 73 [2021-12-17 02:59:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:20,767 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1514 transitions. [2021-12-17 02:59:20,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:59:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1514 transitions. [2021-12-17 02:59:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 02:59:20,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:20,769 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:59:20,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 02:59:20,769 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2140115661, now seen corresponding path program 1 times [2021-12-17 02:59:20,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:20,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909421855] [2021-12-17 02:59:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:20,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:23,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 02:59:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:23,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 02:59:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:23,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 02:59:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:23,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 02:59:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:23,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 02:59:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:23,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:59:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:59:23,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:23,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909421855] [2021-12-17 02:59:23,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909421855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:23,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:23,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:59:23,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269435581] [2021-12-17 02:59:23,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:23,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:59:23,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:23,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:59:23,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:59:23,421 INFO L87 Difference]: Start difference. First operand 1067 states and 1514 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 02:59:25,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:27,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:29,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:31,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:33,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:42,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:43,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:43,059 INFO L93 Difference]: Finished difference Result 2362 states and 3646 transitions. [2021-12-17 02:59:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 02:59:43,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 91 [2021-12-17 02:59:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:43,065 INFO L225 Difference]: With dead ends: 2362 [2021-12-17 02:59:43,065 INFO L226 Difference]: Without dead ends: 1418 [2021-12-17 02:59:43,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-12-17 02:59:43,068 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 278 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 120 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:43,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 2185 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1319 Invalid, 6 Unknown, 0 Unchecked, 19.2s Time] [2021-12-17 02:59:43,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-12-17 02:59:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1106. [2021-12-17 02:59:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 824 states have (on average 1.3300970873786409) internal successors, (1096), 835 states have internal predecessors, (1096), 195 states have call successors, (195), 78 states have call predecessors, (195), 86 states have return successors, (321), 196 states have call predecessors, (321), 188 states have call successors, (321) [2021-12-17 02:59:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1612 transitions. [2021-12-17 02:59:43,135 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1612 transitions. Word has length 91 [2021-12-17 02:59:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:43,135 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1612 transitions. [2021-12-17 02:59:43,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 02:59:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1612 transitions. [2021-12-17 02:59:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 02:59:43,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:43,137 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:59:43,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 02:59:43,137 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash -552416072, now seen corresponding path program 1 times [2021-12-17 02:59:43,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:43,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876524169] [2021-12-17 02:59:43,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:43,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:45,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 02:59:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:45,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 02:59:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:45,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 02:59:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:45,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 02:59:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:45,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 02:59:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:45,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:59:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 02:59:45,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:45,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876524169] [2021-12-17 02:59:45,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876524169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:45,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:45,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:59:45,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677236944] [2021-12-17 02:59:45,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:45,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:59:45,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:59:45,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:59:45,595 INFO L87 Difference]: Start difference. First operand 1106 states and 1612 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 02:59:47,746 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:49,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:51,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:55,594 INFO L93 Difference]: Finished difference Result 2332 states and 3753 transitions. [2021-12-17 02:59:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:59:55,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 92 [2021-12-17 02:59:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:55,604 INFO L225 Difference]: With dead ends: 2332 [2021-12-17 02:59:55,604 INFO L226 Difference]: Without dead ends: 2329 [2021-12-17 02:59:55,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:59:55,606 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 571 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 301 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:55,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1462 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 898 Invalid, 3 Unknown, 0 Unchecked, 9.6s Time] [2021-12-17 02:59:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2021-12-17 02:59:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 1114. [2021-12-17 02:59:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 832 states have (on average 1.3317307692307692) internal successors, (1108), 843 states have internal predecessors, (1108), 195 states have call successors, (195), 78 states have call predecessors, (195), 86 states have return successors, (321), 196 states have call predecessors, (321), 188 states have call successors, (321) [2021-12-17 02:59:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1624 transitions. [2021-12-17 02:59:55,693 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1624 transitions. Word has length 92 [2021-12-17 02:59:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:55,694 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1624 transitions. [2021-12-17 02:59:55,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 02:59:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1624 transitions. [2021-12-17 02:59:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 02:59:55,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:55,696 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:59:55,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 02:59:55,696 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:55,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:55,696 INFO L85 PathProgramCache]: Analyzing trace with hash -460104214, now seen corresponding path program 1 times [2021-12-17 02:59:55,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:55,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104391760] [2021-12-17 02:59:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:55,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 02:59:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 02:59:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 02:59:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:59:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 02:59:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 02:59:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:59:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 02:59:58,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:58,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104391760] [2021-12-17 02:59:58,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104391760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:59:58,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405962249] [2021-12-17 02:59:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:58,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:59:58,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:59:58,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:59:58,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:00:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:12,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 19863 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 03:00:12,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:00:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:00:13,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:00:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:00:13,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405962249] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 03:00:13,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 03:00:13,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2021-12-17 03:00:13,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641918957] [2021-12-17 03:00:13,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 03:00:13,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 03:00:13,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:13,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 03:00:13,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-12-17 03:00:13,693 INFO L87 Difference]: Start difference. First operand 1114 states and 1624 transitions. Second operand has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 03:00:15,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:18,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:22,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:22,673 INFO L93 Difference]: Finished difference Result 2507 states and 3814 transitions. [2021-12-17 03:00:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 03:00:22,674 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 93 [2021-12-17 03:00:22,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:22,681 INFO L225 Difference]: With dead ends: 2507 [2021-12-17 03:00:22,681 INFO L226 Difference]: Without dead ends: 1407 [2021-12-17 03:00:22,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-12-17 03:00:22,684 INFO L933 BasicCegarLoop]: 446 mSDtfsCounter, 585 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 274 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:22,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 1412 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1133 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2021-12-17 03:00:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-12-17 03:00:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1132. [2021-12-17 03:00:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 850 states have (on average 1.3247058823529412) internal successors, (1126), 861 states have internal predecessors, (1126), 195 states have call successors, (195), 78 states have call predecessors, (195), 86 states have return successors, (321), 196 states have call predecessors, (321), 188 states have call successors, (321) [2021-12-17 03:00:22,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1642 transitions. [2021-12-17 03:00:22,755 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1642 transitions. Word has length 93 [2021-12-17 03:00:22,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:22,755 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1642 transitions. [2021-12-17 03:00:22,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 03:00:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1642 transitions. [2021-12-17 03:00:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 03:00:22,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:22,757 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:00:22,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 03:00:22,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:00:22,979 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:22,981 INFO L85 PathProgramCache]: Analyzing trace with hash -832236025, now seen corresponding path program 2 times [2021-12-17 03:00:22,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:22,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418110388] [2021-12-17 03:00:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:22,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:26,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 03:00:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:26,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 03:00:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:26,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 03:00:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:26,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:00:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:26,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:00:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:26,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:00:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:26,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:00:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 03:00:26,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:26,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418110388] [2021-12-17 03:00:26,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418110388] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:00:26,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915702393] [2021-12-17 03:00:26,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 03:00:26,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:00:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:00:26,926 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:00:26,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 03:00:43,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 03:00:43,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 03:00:43,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 19788 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 03:00:43,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:00:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-17 03:00:43,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:00:43,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915702393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:43,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:00:43,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [21] total 24 [2021-12-17 03:00:43,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597987482] [2021-12-17 03:00:43,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:43,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:00:43,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:43,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:00:43,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-12-17 03:00:43,772 INFO L87 Difference]: Start difference. First operand 1132 states and 1642 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 03:00:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:43,845 INFO L93 Difference]: Finished difference Result 2122 states and 3202 transitions. [2021-12-17 03:00:43,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 03:00:43,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 111 [2021-12-17 03:00:43,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:43,849 INFO L225 Difference]: With dead ends: 2122 [2021-12-17 03:00:43,849 INFO L226 Difference]: Without dead ends: 1172 [2021-12-17 03:00:43,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-12-17 03:00:43,852 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 15 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:43,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 1723 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:00:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-12-17 03:00:43,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1151. [2021-12-17 03:00:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 866 states have (on average 1.3221709006928406) internal successors, (1145), 880 states have internal predecessors, (1145), 195 states have call successors, (195), 78 states have call predecessors, (195), 89 states have return successors, (337), 196 states have call predecessors, (337), 188 states have call successors, (337) [2021-12-17 03:00:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1677 transitions. [2021-12-17 03:00:43,919 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1677 transitions. Word has length 111 [2021-12-17 03:00:43,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:43,919 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1677 transitions. [2021-12-17 03:00:43,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 03:00:43,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1677 transitions. [2021-12-17 03:00:43,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 03:00:43,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:43,921 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:00:44,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 03:00:44,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 03:00:44,145 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:44,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1321037536, now seen corresponding path program 1 times [2021-12-17 03:00:44,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:44,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127914133] [2021-12-17 03:00:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:44,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:46,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 03:00:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:46,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 03:00:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:46,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 03:00:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:46,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:00:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:46,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:00:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:46,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:00:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:46,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:00:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-17 03:00:46,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:46,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127914133] [2021-12-17 03:00:46,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127914133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:46,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:46,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:00:46,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545209906] [2021-12-17 03:00:46,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:46,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:00:46,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:00:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:00:46,965 INFO L87 Difference]: Start difference. First operand 1151 states and 1677 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 03:00:49,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:51,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:53,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:55,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:59,050 INFO L93 Difference]: Finished difference Result 1592 states and 2427 transitions. [2021-12-17 03:00:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 03:00:59,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 111 [2021-12-17 03:00:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:59,053 INFO L225 Difference]: With dead ends: 1592 [2021-12-17 03:00:59,053 INFO L226 Difference]: Without dead ends: 578 [2021-12-17 03:00:59,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:00:59,057 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 426 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 103 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:59,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 813 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 831 Invalid, 4 Unknown, 0 Unchecked, 11.7s Time] [2021-12-17 03:00:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-12-17 03:00:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 528. [2021-12-17 03:00:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 394 states have (on average 1.2741116751269035) internal successors, (502), 399 states have internal predecessors, (502), 96 states have call successors, (96), 36 states have call predecessors, (96), 37 states have return successors, (131), 94 states have call predecessors, (131), 92 states have call successors, (131) [2021-12-17 03:00:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 729 transitions. [2021-12-17 03:00:59,093 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 729 transitions. Word has length 111 [2021-12-17 03:00:59,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:59,094 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 729 transitions. [2021-12-17 03:00:59,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 03:00:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 729 transitions. [2021-12-17 03:00:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-17 03:00:59,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:59,095 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:00:59,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 03:00:59,096 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:59,096 INFO L85 PathProgramCache]: Analyzing trace with hash 317031214, now seen corresponding path program 1 times [2021-12-17 03:00:59,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:59,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664454256] [2021-12-17 03:00:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:59,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:01,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 03:01:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:01,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 03:01:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:01,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 03:01:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:01,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:01:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:01,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:01:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:01,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:01:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:01,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:01:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:01,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:01:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-17 03:01:01,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:01,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664454256] [2021-12-17 03:01:01,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664454256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:01,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:01,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 03:01:01,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937674493] [2021-12-17 03:01:01,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:01,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 03:01:01,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:01,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 03:01:01,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:01:01,925 INFO L87 Difference]: Start difference. First operand 528 states and 729 transitions. Second operand has 10 states, 10 states have (on average 6.7) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 03:01:04,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:06,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:08,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:10,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:15,025 INFO L93 Difference]: Finished difference Result 964 states and 1413 transitions. [2021-12-17 03:01:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 03:01:15,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-12-17 03:01:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:15,028 INFO L225 Difference]: With dead ends: 964 [2021-12-17 03:01:15,028 INFO L226 Difference]: Without dead ends: 578 [2021-12-17 03:01:15,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-17 03:01:15,030 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 529 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 216 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:15,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 1179 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1077 Invalid, 4 Unknown, 0 Unchecked, 12.5s Time] [2021-12-17 03:01:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-12-17 03:01:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 523. [2021-12-17 03:01:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 390 states have (on average 1.2717948717948717) internal successors, (496), 395 states have internal predecessors, (496), 96 states have call successors, (96), 36 states have call predecessors, (96), 36 states have return successors, (122), 93 states have call predecessors, (122), 92 states have call successors, (122) [2021-12-17 03:01:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 714 transitions. [2021-12-17 03:01:15,061 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 714 transitions. Word has length 115 [2021-12-17 03:01:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:15,061 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 714 transitions. [2021-12-17 03:01:15,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 03:01:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 714 transitions. [2021-12-17 03:01:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 03:01:15,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:15,062 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:01:15,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 03:01:15,063 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:15,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash 133993994, now seen corresponding path program 1 times [2021-12-17 03:01:15,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:15,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980272665] [2021-12-17 03:01:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:15,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:17,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 03:01:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:17,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 03:01:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:17,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 03:01:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:17,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 03:01:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:17,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 03:01:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:17,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:01:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:17,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:01:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-17 03:01:17,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:17,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980272665] [2021-12-17 03:01:17,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980272665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:17,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:17,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:01:17,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752925240] [2021-12-17 03:01:17,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:17,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:01:17,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:17,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:01:17,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:01:17,638 INFO L87 Difference]: Start difference. First operand 523 states and 714 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 03:01:19,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:21,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:25,941 INFO L93 Difference]: Finished difference Result 965 states and 1403 transitions. [2021-12-17 03:01:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 03:01:25,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 117 [2021-12-17 03:01:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:25,943 INFO L225 Difference]: With dead ends: 965 [2021-12-17 03:01:25,943 INFO L226 Difference]: Without dead ends: 584 [2021-12-17 03:01:25,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:01:25,945 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 180 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 116 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:25,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1214 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 697 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2021-12-17 03:01:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-12-17 03:01:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 526. [2021-12-17 03:01:25,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 393 states have (on average 1.2697201017811706) internal successors, (499), 398 states have internal predecessors, (499), 96 states have call successors, (96), 36 states have call predecessors, (96), 36 states have return successors, (122), 93 states have call predecessors, (122), 92 states have call successors, (122) [2021-12-17 03:01:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 717 transitions. [2021-12-17 03:01:25,984 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 717 transitions. Word has length 117 [2021-12-17 03:01:25,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:25,985 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 717 transitions. [2021-12-17 03:01:25,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 03:01:25,985 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 717 transitions. [2021-12-17 03:01:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 03:01:25,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:25,986 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:01:25,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 03:01:25,987 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash -877123256, now seen corresponding path program 1 times [2021-12-17 03:01:25,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:25,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455693425] [2021-12-17 03:01:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:25,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:28,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 03:01:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:28,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 03:01:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:28,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 03:01:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:28,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 03:01:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:28,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 03:01:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:28,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:01:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:28,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:01:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-17 03:01:28,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:28,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455693425] [2021-12-17 03:01:28,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455693425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:28,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:28,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 03:01:28,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860592241] [2021-12-17 03:01:28,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:28,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 03:01:28,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 03:01:28,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 03:01:28,666 INFO L87 Difference]: Start difference. First operand 526 states and 717 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 03:01:30,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:33,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:35,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:37,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:39,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:44,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:44,993 INFO L93 Difference]: Finished difference Result 1111 states and 1612 transitions. [2021-12-17 03:01:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 03:01:44,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 117 [2021-12-17 03:01:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:44,997 INFO L225 Difference]: With dead ends: 1111 [2021-12-17 03:01:44,997 INFO L226 Difference]: Without dead ends: 744 [2021-12-17 03:01:44,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2021-12-17 03:01:44,999 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 1601 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 1111 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1111 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:45,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1658 Valid, 1057 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1111 Valid, 1290 Invalid, 5 Unknown, 0 Unchecked, 15.1s Time] [2021-12-17 03:01:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-17 03:01:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 523. [2021-12-17 03:01:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 390 states have (on average 1.2615384615384615) internal successors, (492), 395 states have internal predecessors, (492), 96 states have call successors, (96), 36 states have call predecessors, (96), 36 states have return successors, (117), 93 states have call predecessors, (117), 92 states have call successors, (117) [2021-12-17 03:01:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 705 transitions. [2021-12-17 03:01:45,042 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 705 transitions. Word has length 117 [2021-12-17 03:01:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:45,042 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 705 transitions. [2021-12-17 03:01:45,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 03:01:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 705 transitions. [2021-12-17 03:01:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 03:01:45,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:45,044 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:01:45,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 03:01:45,044 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:45,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1607212468, now seen corresponding path program 1 times [2021-12-17 03:01:45,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:45,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097646497] [2021-12-17 03:01:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:45,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:47,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 03:01:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:47,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 03:01:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:47,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 03:01:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:47,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:01:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:47,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:01:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-17 03:01:47,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097646497] [2021-12-17 03:01:47,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097646497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:47,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:47,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:01:47,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388768348] [2021-12-17 03:01:47,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:47,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:01:47,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:47,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:01:47,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:01:47,624 INFO L87 Difference]: Start difference. First operand 523 states and 705 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:01:49,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:51,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:54,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:56,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:58,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-17 03:02:01,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:01,394 INFO L93 Difference]: Finished difference Result 1160 states and 1655 transitions. [2021-12-17 03:02:01,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:02:01,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 103 [2021-12-17 03:02:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:01,397 INFO L225 Difference]: With dead ends: 1160 [2021-12-17 03:02:01,397 INFO L226 Difference]: Without dead ends: 782 [2021-12-17 03:02:01,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-12-17 03:02:01,400 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 578 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 385 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:01,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 1019 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 716 Invalid, 4 Unknown, 0 Unchecked, 13.3s Time] [2021-12-17 03:02:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-12-17 03:02:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 682. [2021-12-17 03:02:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 502 states have (on average 1.2609561752988048) internal successors, (633), 509 states have internal predecessors, (633), 129 states have call successors, (129), 47 states have call predecessors, (129), 50 states have return successors, (158), 128 states have call predecessors, (158), 126 states have call successors, (158) [2021-12-17 03:02:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 920 transitions. [2021-12-17 03:02:01,452 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 920 transitions. Word has length 103 [2021-12-17 03:02:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:01,453 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 920 transitions. [2021-12-17 03:02:01,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:02:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 920 transitions. [2021-12-17 03:02:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-17 03:02:01,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:01,455 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:02:01,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 03:02:01,455 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:01,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:01,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1832754480, now seen corresponding path program 1 times [2021-12-17 03:02:01,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:01,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115384150] [2021-12-17 03:02:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:01,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:04,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 03:02:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:04,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 03:02:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:04,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 03:02:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:04,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:02:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:04,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:02:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:04,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:02:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:04,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:02:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:04,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:02:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 03:02:04,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:04,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115384150] [2021-12-17 03:02:04,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115384150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:02:04,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866747670] [2021-12-17 03:02:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:04,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:02:04,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:02:04,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:02:04,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 03:02:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:22,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 19965 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 03:02:22,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:02:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 03:02:22,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:02:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 03:02:24,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866747670] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 03:02:24,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 03:02:24,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 36 [2021-12-17 03:02:24,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900634363] [2021-12-17 03:02:24,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 03:02:24,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 03:02:24,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:24,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 03:02:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=778, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 03:02:24,193 INFO L87 Difference]: Start difference. First operand 682 states and 920 transitions. Second operand has 36 states, 36 states have (on average 4.75) internal successors, (171), 31 states have internal predecessors, (171), 2 states have call successors, (24), 7 states have call predecessors, (24), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 03:02:26,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:28,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:30,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:33,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-17 03:02:36,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-17 03:02:38,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-17 03:02:40,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:40,657 INFO L93 Difference]: Finished difference Result 1436 states and 2014 transitions. [2021-12-17 03:02:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 03:02:40,658 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.75) internal successors, (171), 31 states have internal predecessors, (171), 2 states have call successors, (24), 7 states have call predecessors, (24), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 118 [2021-12-17 03:02:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:40,660 INFO L225 Difference]: With dead ends: 1436 [2021-12-17 03:02:40,660 INFO L226 Difference]: Without dead ends: 784 [2021-12-17 03:02:40,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=510, Invalid=1050, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 03:02:40,662 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 710 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 375 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:40,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 1625 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 1181 Invalid, 5 Unknown, 0 Unchecked, 16.1s Time] [2021-12-17 03:02:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-17 03:02:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 710. [2021-12-17 03:02:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 530 states have (on average 1.2471698113207548) internal successors, (661), 537 states have internal predecessors, (661), 129 states have call successors, (129), 47 states have call predecessors, (129), 50 states have return successors, (158), 128 states have call predecessors, (158), 126 states have call successors, (158) [2021-12-17 03:02:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 948 transitions. [2021-12-17 03:02:40,703 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 948 transitions. Word has length 118 [2021-12-17 03:02:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:40,703 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 948 transitions. [2021-12-17 03:02:40,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.75) internal successors, (171), 31 states have internal predecessors, (171), 2 states have call successors, (24), 7 states have call predecessors, (24), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 03:02:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 948 transitions. [2021-12-17 03:02:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 03:02:40,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:40,705 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:02:40,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 03:02:40,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-17 03:02:40,905 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:40,906 INFO L85 PathProgramCache]: Analyzing trace with hash 749617750, now seen corresponding path program 2 times [2021-12-17 03:02:40,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:40,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670442053] [2021-12-17 03:02:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:40,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:43,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 03:02:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:43,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 03:02:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:43,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 03:02:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:43,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:02:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:43,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:02:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:43,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:02:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:43,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:02:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:44,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:02:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:02:44,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:44,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670442053] [2021-12-17 03:02:44,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670442053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:44,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:44,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:02:44,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871693483] [2021-12-17 03:02:44,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:44,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:02:44,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:44,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:02:44,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:02:44,055 INFO L87 Difference]: Start difference. First operand 710 states and 948 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-17 03:02:46,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:48,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:50,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:52,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:55,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-17 03:02:56,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-17 03:02:58,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-17 03:03:00,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-17 03:03:02,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:03:02,895 INFO L93 Difference]: Finished difference Result 1309 states and 1848 transitions. [2021-12-17 03:03:02,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 03:03:02,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 146 [2021-12-17 03:03:02,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:03:02,898 INFO L225 Difference]: With dead ends: 1309 [2021-12-17 03:03:02,898 INFO L226 Difference]: Without dead ends: 784 [2021-12-17 03:03:02,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-17 03:03:02,901 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 281 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 227 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:03:02,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 1952 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 938 Invalid, 6 Unknown, 0 Unchecked, 18.4s Time] [2021-12-17 03:03:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-17 03:03:03,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 710. [2021-12-17 03:03:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 530 states have (on average 1.241509433962264) internal successors, (658), 537 states have internal predecessors, (658), 129 states have call successors, (129), 47 states have call predecessors, (129), 50 states have return successors, (158), 128 states have call predecessors, (158), 126 states have call successors, (158) [2021-12-17 03:03:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 945 transitions. [2021-12-17 03:03:03,002 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 945 transitions. Word has length 146 [2021-12-17 03:03:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:03:03,003 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 945 transitions. [2021-12-17 03:03:03,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-17 03:03:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 945 transitions. [2021-12-17 03:03:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 03:03:03,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:03:03,004 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:03:03,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 03:03:03,004 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:03:03,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:03:03,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1097416834, now seen corresponding path program 1 times [2021-12-17 03:03:03,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:03:03,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903172959] [2021-12-17 03:03:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:03:03,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:03:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:05,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 03:03:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:05,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 03:03:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:05,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 03:03:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:05,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 03:03:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:05,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 03:03:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:05,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 03:03:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:03:05,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:03:05,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903172959] [2021-12-17 03:03:05,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903172959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:03:05,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:03:05,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:03:05,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291816007] [2021-12-17 03:03:05,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:03:05,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:03:05,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:03:05,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:03:05,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:03:05,704 INFO L87 Difference]: Start difference. First operand 710 states and 945 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:03:07,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:09,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:12,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:14,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:16,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:18,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:03:21,628 INFO L93 Difference]: Finished difference Result 798 states and 1122 transitions. [2021-12-17 03:03:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 03:03:21,629 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 138 [2021-12-17 03:03:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:03:21,631 INFO L225 Difference]: With dead ends: 798 [2021-12-17 03:03:21,631 INFO L226 Difference]: Without dead ends: 735 [2021-12-17 03:03:21,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:03:21,632 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 207 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 141 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:03:21,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1590 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 784 Invalid, 6 Unknown, 0 Unchecked, 15.7s Time] [2021-12-17 03:03:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-12-17 03:03:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 665. [2021-12-17 03:03:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 496 states have (on average 1.2439516129032258) internal successors, (617), 503 states have internal predecessors, (617), 122 states have call successors, (122), 43 states have call predecessors, (122), 46 states have return successors, (151), 121 states have call predecessors, (151), 119 states have call successors, (151) [2021-12-17 03:03:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 890 transitions. [2021-12-17 03:03:21,682 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 890 transitions. Word has length 138 [2021-12-17 03:03:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:03:21,683 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 890 transitions. [2021-12-17 03:03:21,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:03:21,683 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 890 transitions. [2021-12-17 03:03:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-17 03:03:21,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:03:21,684 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:03:21,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 03:03:21,685 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:03:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:03:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1236520754, now seen corresponding path program 1 times [2021-12-17 03:03:21,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:03:21,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466029859] [2021-12-17 03:03:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:03:21,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:03:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:24,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 03:03:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:24,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 03:03:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:24,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 03:03:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:24,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:03:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:24,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:03:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:24,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:03:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:24,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:03:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:24,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:03:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:24,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 03:03:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:03:24,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:03:24,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466029859] [2021-12-17 03:03:24,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466029859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:03:24,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:03:24,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 03:03:24,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923916072] [2021-12-17 03:03:24,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:03:24,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 03:03:24,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:03:24,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 03:03:24,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:03:24,480 INFO L87 Difference]: Start difference. First operand 665 states and 890 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 8 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:03:26,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:28,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:30,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:32,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:34,983 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:37,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:03:41,167 INFO L93 Difference]: Finished difference Result 1230 states and 1724 transitions. [2021-12-17 03:03:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 03:03:41,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 8 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 156 [2021-12-17 03:03:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:03:41,170 INFO L225 Difference]: With dead ends: 1230 [2021-12-17 03:03:41,170 INFO L226 Difference]: Without dead ends: 707 [2021-12-17 03:03:41,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-12-17 03:03:41,173 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 545 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 370 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:03:41,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 1397 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 1013 Invalid, 6 Unknown, 0 Unchecked, 15.9s Time] [2021-12-17 03:03:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-12-17 03:03:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 635. [2021-12-17 03:03:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 473 states have (on average 1.245243128964059) internal successors, (589), 482 states have internal predecessors, (589), 118 states have call successors, (118), 43 states have call predecessors, (118), 43 states have return successors, (134), 112 states have call predecessors, (134), 115 states have call successors, (134) [2021-12-17 03:03:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 841 transitions. [2021-12-17 03:03:41,267 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 841 transitions. Word has length 156 [2021-12-17 03:03:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:03:41,268 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 841 transitions. [2021-12-17 03:03:41,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 8 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:03:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 841 transitions. [2021-12-17 03:03:41,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-17 03:03:41,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:03:41,269 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:03:41,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 03:03:41,270 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:03:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:03:41,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1545285043, now seen corresponding path program 1 times [2021-12-17 03:03:41,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:03:41,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841076545] [2021-12-17 03:03:41,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:03:41,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:03:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:43,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 03:03:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:43,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 03:03:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:43,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 03:03:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:44,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:03:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:44,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:03:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:44,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:03:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:44,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:03:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:44,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:03:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:44,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-17 03:03:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:03:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:03:44,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:03:44,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841076545] [2021-12-17 03:03:44,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841076545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:03:44,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:03:44,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 03:03:44,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723329357] [2021-12-17 03:03:44,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:03:44,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 03:03:44,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:03:44,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 03:03:44,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-12-17 03:03:44,581 INFO L87 Difference]: Start difference. First operand 635 states and 841 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 11 states have internal predecessors, (85), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:03:46,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:48,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:50,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:52,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:03:55,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:00,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:00,161 INFO L93 Difference]: Finished difference Result 734 states and 1031 transitions. [2021-12-17 03:04:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 03:04:00,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 11 states have internal predecessors, (85), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 162 [2021-12-17 03:04:00,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:00,165 INFO L225 Difference]: With dead ends: 734 [2021-12-17 03:04:00,165 INFO L226 Difference]: Without dead ends: 714 [2021-12-17 03:04:00,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-12-17 03:04:00,166 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 367 mSDsluCounter, 3048 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 245 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:00,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 3364 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1544 Invalid, 5 Unknown, 0 Unchecked, 14.8s Time] [2021-12-17 03:04:00,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-12-17 03:04:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 638. [2021-12-17 03:04:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 475 states have (on average 1.2442105263157894) internal successors, (591), 485 states have internal predecessors, (591), 118 states have call successors, (118), 43 states have call predecessors, (118), 44 states have return successors, (135), 112 states have call predecessors, (135), 115 states have call successors, (135) [2021-12-17 03:04:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 844 transitions. [2021-12-17 03:04:00,214 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 844 transitions. Word has length 162 [2021-12-17 03:04:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:00,215 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 844 transitions. [2021-12-17 03:04:00,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 11 states have internal predecessors, (85), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:04:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 844 transitions. [2021-12-17 03:04:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 03:04:00,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:00,216 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:00,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 03:04:00,217 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:00,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:00,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1963891722, now seen corresponding path program 1 times [2021-12-17 03:04:00,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:00,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422178868] [2021-12-17 03:04:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:00,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:02,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 03:04:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:02,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 03:04:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:02,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 03:04:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:03,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:03,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:04:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:03,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:04:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:03,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:04:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:03,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:04:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:03,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 03:04:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:04:03,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:03,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422178868] [2021-12-17 03:04:03,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422178868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:03,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:03,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 03:04:03,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724319734] [2021-12-17 03:04:03,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:03,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 03:04:03,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 03:04:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-12-17 03:04:03,512 INFO L87 Difference]: Start difference. First operand 638 states and 844 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:04:05,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:07,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:09,899 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:15,229 INFO L93 Difference]: Finished difference Result 1221 states and 1694 transitions. [2021-12-17 03:04:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 03:04:15,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 163 [2021-12-17 03:04:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:15,232 INFO L225 Difference]: With dead ends: 1221 [2021-12-17 03:04:15,232 INFO L226 Difference]: Without dead ends: 710 [2021-12-17 03:04:15,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-12-17 03:04:15,234 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 308 mSDsluCounter, 3205 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 198 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 3538 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:15,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 3538 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1629 Invalid, 3 Unknown, 0 Unchecked, 11.0s Time] [2021-12-17 03:04:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-17 03:04:15,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 623. [2021-12-17 03:04:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 464 states have (on average 1.2478448275862069) internal successors, (579), 473 states have internal predecessors, (579), 116 states have call successors, (116), 43 states have call predecessors, (116), 42 states have return successors, (126), 109 states have call predecessors, (126), 113 states have call successors, (126) [2021-12-17 03:04:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 821 transitions. [2021-12-17 03:04:15,276 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 821 transitions. Word has length 163 [2021-12-17 03:04:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:15,277 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 821 transitions. [2021-12-17 03:04:15,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:04:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 821 transitions. [2021-12-17 03:04:15,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-17 03:04:15,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:15,279 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:15,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 03:04:15,279 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1226776691, now seen corresponding path program 1 times [2021-12-17 03:04:15,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:15,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666743914] [2021-12-17 03:04:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:15,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:17,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 03:04:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:17,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 03:04:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 03:04:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:04:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:04:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:04:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:04:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 03:04:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 03:04:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:04:18,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:18,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666743914] [2021-12-17 03:04:18,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666743914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:18,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:18,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-17 03:04:18,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314178333] [2021-12-17 03:04:18,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:18,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 03:04:18,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:18,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 03:04:18,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-17 03:04:18,615 INFO L87 Difference]: Start difference. First operand 623 states and 821 transitions. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:04:20,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:23,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:25,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:27,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:29,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:31,309 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:38,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:38,677 INFO L93 Difference]: Finished difference Result 1301 states and 1855 transitions. [2021-12-17 03:04:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 03:04:38,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 172 [2021-12-17 03:04:38,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:38,681 INFO L225 Difference]: With dead ends: 1301 [2021-12-17 03:04:38,682 INFO L226 Difference]: Without dead ends: 1256 [2021-12-17 03:04:38,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 03:04:38,683 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 584 mSDsluCounter, 2900 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 224 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 3279 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:38,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 3279 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2028 Invalid, 6 Unknown, 0 Unchecked, 18.7s Time] [2021-12-17 03:04:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-12-17 03:04:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1090. [2021-12-17 03:04:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 787 states have (on average 1.2744599745870393) internal successors, (1003), 822 states have internal predecessors, (1003), 222 states have call successors, (222), 80 states have call predecessors, (222), 80 states have return successors, (245), 190 states have call predecessors, (245), 219 states have call successors, (245) [2021-12-17 03:04:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1470 transitions. [2021-12-17 03:04:38,771 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1470 transitions. Word has length 172 [2021-12-17 03:04:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:38,772 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1470 transitions. [2021-12-17 03:04:38,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:04:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1470 transitions. [2021-12-17 03:04:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-17 03:04:38,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:38,774 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:38,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 03:04:38,774 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:38,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash -639931983, now seen corresponding path program 1 times [2021-12-17 03:04:38,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:38,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373113102] [2021-12-17 03:04:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:38,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:04:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:41,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 03:04:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:41,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 03:04:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:41,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 03:04:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:41,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:04:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:41,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:04:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:42,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:04:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:42,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:04:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:42,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:04:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:42,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 03:04:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:42,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 03:04:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:04:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:04:42,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:04:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373113102] [2021-12-17 03:04:42,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373113102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:04:42,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:04:42,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-17 03:04:42,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433677507] [2021-12-17 03:04:42,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:04:42,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 03:04:42,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:04:42,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 03:04:42,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-17 03:04:42,324 INFO L87 Difference]: Start difference. First operand 1090 states and 1470 transitions. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:04:44,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:46,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:48,738 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:50,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:04:59,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:04:59,195 INFO L93 Difference]: Finished difference Result 1276 states and 1817 transitions. [2021-12-17 03:04:59,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 03:04:59,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 172 [2021-12-17 03:04:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:04:59,207 INFO L225 Difference]: With dead ends: 1276 [2021-12-17 03:04:59,207 INFO L226 Difference]: Without dead ends: 1227 [2021-12-17 03:04:59,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 03:04:59,217 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 672 mSDsluCounter, 4127 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 295 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 4695 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:04:59,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 4695 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 2515 Invalid, 4 Unknown, 0 Unchecked, 15.6s Time] [2021-12-17 03:04:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-12-17 03:04:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 597. [2021-12-17 03:04:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 444 states have (on average 1.2387387387387387) internal successors, (550), 453 states have internal predecessors, (550), 112 states have call successors, (112), 41 states have call predecessors, (112), 40 states have return successors, (122), 105 states have call predecessors, (122), 109 states have call successors, (122) [2021-12-17 03:04:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 784 transitions. [2021-12-17 03:04:59,277 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 784 transitions. Word has length 172 [2021-12-17 03:04:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:04:59,277 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 784 transitions. [2021-12-17 03:04:59,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:04:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 784 transitions. [2021-12-17 03:04:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 03:04:59,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:04:59,279 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:59,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 03:04:59,279 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:04:59,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:04:59,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1524033808, now seen corresponding path program 1 times [2021-12-17 03:04:59,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:04:59,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257883542] [2021-12-17 03:04:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:04:59,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:01,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 03:05:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:01,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:05:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:01,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:05:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:01,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:05:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:01,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:05:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:01,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:05:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:02,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 03:05:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:02,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 03:05:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:02,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-17 03:05:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:05:02,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:02,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257883542] [2021-12-17 03:05:02,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257883542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:02,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:02,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:05:02,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104738048] [2021-12-17 03:05:02,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:02,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:05:02,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:02,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:05:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:05:02,235 INFO L87 Difference]: Start difference. First operand 597 states and 784 transitions. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:05:04,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:06,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:08,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:10,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:13,774 INFO L93 Difference]: Finished difference Result 838 states and 1212 transitions. [2021-12-17 03:05:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:05:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 166 [2021-12-17 03:05:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:13,779 INFO L225 Difference]: With dead ends: 838 [2021-12-17 03:05:13,779 INFO L226 Difference]: Without dead ends: 766 [2021-12-17 03:05:13,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-12-17 03:05:13,780 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 419 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 266 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:13,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 1609 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 847 Invalid, 4 Unknown, 0 Unchecked, 11.0s Time] [2021-12-17 03:05:13,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-12-17 03:05:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 605. [2021-12-17 03:05:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 450 states have (on average 1.2355555555555555) internal successors, (556), 459 states have internal predecessors, (556), 112 states have call successors, (112), 41 states have call predecessors, (112), 42 states have return successors, (130), 107 states have call predecessors, (130), 109 states have call successors, (130) [2021-12-17 03:05:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 798 transitions. [2021-12-17 03:05:13,837 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 798 transitions. Word has length 166 [2021-12-17 03:05:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:13,838 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 798 transitions. [2021-12-17 03:05:13,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:05:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 798 transitions. [2021-12-17 03:05:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 03:05:13,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:13,840 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:05:13,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 03:05:13,840 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:13,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash -161101711, now seen corresponding path program 1 times [2021-12-17 03:05:13,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:13,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096102830] [2021-12-17 03:05:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:13,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:16,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 03:05:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:16,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:05:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:16,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:05:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:16,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:05:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:17,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:05:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:17,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:05:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:17,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 03:05:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:17,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 03:05:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:17,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-17 03:05:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:05:17,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:17,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096102830] [2021-12-17 03:05:17,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096102830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:17,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:17,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 03:05:17,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484547711] [2021-12-17 03:05:17,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:17,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 03:05:17,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 03:05:17,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-12-17 03:05:17,521 INFO L87 Difference]: Start difference. First operand 605 states and 798 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 11 states have internal predecessors, (89), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:05:19,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:21,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:23,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:25,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:27,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:30,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:32,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:38,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:38,779 INFO L93 Difference]: Finished difference Result 943 states and 1499 transitions. [2021-12-17 03:05:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 03:05:38,780 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 11 states have internal predecessors, (89), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 166 [2021-12-17 03:05:38,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:38,818 INFO L225 Difference]: With dead ends: 943 [2021-12-17 03:05:38,818 INFO L226 Difference]: Without dead ends: 855 [2021-12-17 03:05:38,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 03:05:38,820 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 568 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 462 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 3486 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:38,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 3486 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2022 Invalid, 7 Unknown, 0 Unchecked, 20.2s Time] [2021-12-17 03:05:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-12-17 03:05:38,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 766. [2021-12-17 03:05:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 553 states have (on average 1.2278481012658229) internal successors, (679), 567 states have internal predecessors, (679), 168 states have call successors, (168), 41 states have call predecessors, (168), 44 states have return successors, (207), 161 states have call predecessors, (207), 164 states have call successors, (207) [2021-12-17 03:05:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1054 transitions. [2021-12-17 03:05:38,890 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1054 transitions. Word has length 166 [2021-12-17 03:05:38,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:38,890 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1054 transitions. [2021-12-17 03:05:38,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 11 states have internal predecessors, (89), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:05:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1054 transitions. [2021-12-17 03:05:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 03:05:38,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:38,892 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:05:38,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 03:05:38,892 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:38,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1557224420, now seen corresponding path program 1 times [2021-12-17 03:05:38,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:38,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062342702] [2021-12-17 03:05:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:38,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:41,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 03:05:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:41,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:05:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:42,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:05:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:42,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:05:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:42,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:05:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:42,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:05:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:42,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-17 03:05:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 03:05:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:42,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-17 03:05:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:05:42,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:42,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062342702] [2021-12-17 03:05:42,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062342702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:42,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:42,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 03:05:42,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274210354] [2021-12-17 03:05:42,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:42,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 03:05:42,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:42,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 03:05:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-12-17 03:05:42,693 INFO L87 Difference]: Start difference. First operand 766 states and 1054 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:05:44,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:47,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:49,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:51,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:53,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:55,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:57,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:59,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:07,451 INFO L93 Difference]: Finished difference Result 1083 states and 1761 transitions. [2021-12-17 03:06:07,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 03:06:07,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 167 [2021-12-17 03:06:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:07,455 INFO L225 Difference]: With dead ends: 1083 [2021-12-17 03:06:07,455 INFO L226 Difference]: Without dead ends: 995 [2021-12-17 03:06:07,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 03:06:07,456 INFO L933 BasicCegarLoop]: 472 mSDtfsCounter, 427 mSDsluCounter, 4881 mSDsCounter, 0 mSdLazyCounter, 2369 mSolverCounterSat, 205 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 5353 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2369 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:07,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 5353 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2369 Invalid, 8 Unknown, 0 Unchecked, 23.6s Time] [2021-12-17 03:06:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-12-17 03:06:07,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 743. [2021-12-17 03:06:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 536 states have (on average 1.2332089552238805) internal successors, (661), 549 states have internal predecessors, (661), 165 states have call successors, (165), 41 states have call predecessors, (165), 41 states have return successors, (187), 156 states have call predecessors, (187), 161 states have call successors, (187) [2021-12-17 03:06:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1013 transitions. [2021-12-17 03:06:07,504 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1013 transitions. Word has length 167 [2021-12-17 03:06:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:07,504 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1013 transitions. [2021-12-17 03:06:07,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:06:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1013 transitions. [2021-12-17 03:06:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-17 03:06:07,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:07,506 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:06:07,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 03:06:07,506 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1472821169, now seen corresponding path program 1 times [2021-12-17 03:06:07,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:07,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881972731] [2021-12-17 03:06:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:07,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:10,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 03:06:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:10,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:06:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:10,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:06:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:10,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:06:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:11,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:06:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:11,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:06:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:11,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 03:06:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:11,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-17 03:06:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:11,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-17 03:06:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:11,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-17 03:06:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:06:11,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:11,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881972731] [2021-12-17 03:06:11,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881972731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:11,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:11,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 03:06:11,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388461458] [2021-12-17 03:06:11,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:11,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 03:06:11,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 03:06:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:06:11,436 INFO L87 Difference]: Start difference. First operand 743 states and 1013 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:06:13,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:15,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:17,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:20,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:22,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:24,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:33,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:33,646 INFO L93 Difference]: Finished difference Result 1571 states and 2394 transitions. [2021-12-17 03:06:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 03:06:33,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 176 [2021-12-17 03:06:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:33,652 INFO L225 Difference]: With dead ends: 1571 [2021-12-17 03:06:33,652 INFO L226 Difference]: Without dead ends: 1401 [2021-12-17 03:06:33,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=260, Invalid=1720, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 03:06:33,654 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 1170 mSDsluCounter, 3309 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 710 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 3746 SdHoareTripleChecker+Invalid, 3485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:33,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 3746 Invalid, 3485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 2769 Invalid, 6 Unknown, 0 Unchecked, 20.3s Time] [2021-12-17 03:06:33,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-12-17 03:06:33,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1108. [2021-12-17 03:06:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 799 states have (on average 1.2227784730913642) internal successors, (977), 823 states have internal predecessors, (977), 235 states have call successors, (235), 72 states have call predecessors, (235), 73 states have return successors, (267), 216 states have call predecessors, (267), 231 states have call successors, (267) [2021-12-17 03:06:33,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1479 transitions. [2021-12-17 03:06:33,762 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1479 transitions. Word has length 176 [2021-12-17 03:06:33,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:33,763 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1479 transitions. [2021-12-17 03:06:33,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:06:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1479 transitions. [2021-12-17 03:06:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-17 03:06:33,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:33,765 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:06:33,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-17 03:06:33,765 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash 849539567, now seen corresponding path program 1 times [2021-12-17 03:06:33,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:33,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287175839] [2021-12-17 03:06:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:33,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:36,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 03:06:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:36,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:06:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:36,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:06:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:37,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:06:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:37,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:06:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:37,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:06:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:37,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 03:06:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:37,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-17 03:06:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:37,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-17 03:06:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-17 03:06:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-17 03:06:37,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:37,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287175839] [2021-12-17 03:06:37,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287175839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:37,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:37,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 03:06:37,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861120240] [2021-12-17 03:06:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:37,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 03:06:37,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 03:06:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:06:37,540 INFO L87 Difference]: Start difference. First operand 1108 states and 1479 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:06:39,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:41,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:44,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:46,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:48,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:50,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:01,889 INFO L93 Difference]: Finished difference Result 1262 states and 1823 transitions. [2021-12-17 03:07:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 03:07:01,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 176 [2021-12-17 03:07:01,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:01,893 INFO L225 Difference]: With dead ends: 1262 [2021-12-17 03:07:01,893 INFO L226 Difference]: Without dead ends: 1082 [2021-12-17 03:07:01,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 03:07:01,895 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 838 mSDsluCounter, 4358 mSDsCounter, 0 mSdLazyCounter, 3673 mSolverCounterSat, 487 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 4977 SdHoareTripleChecker+Invalid, 4166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 3673 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:01,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 4977 Invalid, 4166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 3673 Invalid, 6 Unknown, 0 Unchecked, 22.5s Time] [2021-12-17 03:07:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-12-17 03:07:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 451. [2021-12-17 03:07:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 345 states have (on average 1.1623188405797102) internal successors, (401), 351 states have internal predecessors, (401), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (80), 67 states have call predecessors, (80), 70 states have call successors, (80) [2021-12-17 03:07:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 554 transitions. [2021-12-17 03:07:01,930 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 554 transitions. Word has length 176 [2021-12-17 03:07:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:01,930 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 554 transitions. [2021-12-17 03:07:01,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:07:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 554 transitions. [2021-12-17 03:07:01,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-17 03:07:01,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:01,932 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:07:01,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-17 03:07:01,932 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:01,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash 2100552038, now seen corresponding path program 1 times [2021-12-17 03:07:01,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:01,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647612426] [2021-12-17 03:07:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:01,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 03:07:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 03:07:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:07:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 03:07:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:07:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:07:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 03:07:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 03:07:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:07:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:07:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-17 03:07:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:05,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-17 03:07:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-12-17 03:07:05,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:05,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647612426] [2021-12-17 03:07:05,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647612426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:05,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:05,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-17 03:07:05,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547784784] [2021-12-17 03:07:05,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:05,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 03:07:05,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 03:07:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-17 03:07:05,071 INFO L87 Difference]: Start difference. First operand 451 states and 554 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 03:07:07,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:09,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:11,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:13,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:15,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:17,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:19,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:21,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15