./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0218.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0218.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:30:44,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:30:44,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:30:44,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:30:44,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:30:44,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:30:44,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:30:44,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:30:44,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:30:44,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:30:44,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:30:44,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:30:44,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:30:44,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:30:44,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:30:44,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:30:44,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:30:44,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:30:44,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:30:44,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:30:44,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:30:44,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:30:44,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:30:44,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:30:44,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:30:44,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:30:44,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:30:44,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:30:44,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:30:44,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:30:44,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:30:44,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:30:44,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:30:44,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:30:44,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:30:44,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:30:44,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:30:44,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:30:44,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:30:44,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:30:44,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:30:44,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:30:44,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:30:44,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:30:44,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:30:44,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:30:44,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:30:44,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:30:44,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:30:44,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:30:44,433 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:30:44,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:30:44,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:30:44,434 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:30:44,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:30:44,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:30:44,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:30:44,435 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:30:44,435 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:30:44,435 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:30:44,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:30:44,435 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:30:44,435 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:30:44,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:30:44,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:30:44,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:30:44,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:30:44,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:30:44,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:30:44,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:30:44,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:30:44,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:30:44,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:30:44,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 [2021-12-22 16:30:44,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:30:44,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:30:44,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:30:44,674 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:30:44,675 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:30:44,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0218.i [2021-12-22 16:30:44,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12020b6bb/d12a0184d15440b4bd17e35a3580d6af/FLAGab95c72c9 [2021-12-22 16:30:45,192 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:30:45,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0218.i [2021-12-22 16:30:45,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12020b6bb/d12a0184d15440b4bd17e35a3580d6af/FLAGab95c72c9 [2021-12-22 16:30:45,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12020b6bb/d12a0184d15440b4bd17e35a3580d6af [2021-12-22 16:30:45,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:30:45,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:30:45,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:30:45,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:30:45,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:30:45,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:30:45" (1/1) ... [2021-12-22 16:30:45,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31410c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:45, skipping insertion in model container [2021-12-22 16:30:45,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:30:45" (1/1) ... [2021-12-22 16:30:45,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:30:45,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:30:46,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:30:46,062 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:30:46,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:30:46,121 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:30:46,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46 WrapperNode [2021-12-22 16:30:46,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:30:46,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:30:46,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:30:46,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:30:46,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,185 INFO L137 Inliner]: procedures = 181, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 216 [2021-12-22 16:30:46,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:30:46,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:30:46,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:30:46,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:30:46,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:30:46,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:30:46,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:30:46,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:30:46,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:30:46,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:46,245 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) [2021-12-22 16:30:46,264 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 [2021-12-22 16:30:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-12-22 16:30:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-12-22 16:30:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:30:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:30:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 16:30:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 16:30:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:30:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 16:30:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 16:30:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:30:46,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:30:46,391 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:30:46,393 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:30:46,755 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:30:46,761 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:30:46,761 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-22 16:30:46,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:30:46 BoogieIcfgContainer [2021-12-22 16:30:46,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:30:46,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:30:46,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:30:46,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:30:46,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:30:45" (1/3) ... [2021-12-22 16:30:46,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2659ec03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:30:46, skipping insertion in model container [2021-12-22 16:30:46,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (2/3) ... [2021-12-22 16:30:46,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2659ec03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:30:46, skipping insertion in model container [2021-12-22 16:30:46,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:30:46" (3/3) ... [2021-12-22 16:30:46,772 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0218.i [2021-12-22 16:30:46,777 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:30:46,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2021-12-22 16:30:46,825 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:30:46,834 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-22 16:30:46,835 INFO L340 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2021-12-22 16:30:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 163 states have internal predecessors, (190), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:30:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:30:46,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:46,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:30:46,867 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:46,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1074826664, now seen corresponding path program 1 times [2021-12-22 16:30:46,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:46,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461188738] [2021-12-22 16:30:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:46,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:46,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:46,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461188738] [2021-12-22 16:30:46,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461188738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:46,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:46,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:30:47,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148123927] [2021-12-22 16:30:47,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:47,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 16:30:47,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:47,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 16:30:47,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 16:30:47,030 INFO L87 Difference]: Start difference. First operand has 167 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 163 states have internal predecessors, (190), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:47,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:47,064 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2021-12-22 16:30:47,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 16:30:47,066 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:30:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:47,071 INFO L225 Difference]: With dead ends: 167 [2021-12-22 16:30:47,072 INFO L226 Difference]: Without dead ends: 165 [2021-12-22 16:30:47,073 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 [2021-12-22 16:30:47,075 INFO L933 BasicCegarLoop]: 188 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, 188 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 [2021-12-22 16:30:47,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:30:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-22 16:30:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-12-22 16:30:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 97 states have (on average 1.8762886597938144) internal successors, (182), 161 states have internal predecessors, (182), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:30:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2021-12-22 16:30:47,108 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 6 [2021-12-22 16:30:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:47,108 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2021-12-22 16:30:47,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2021-12-22 16:30:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:30:47,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:47,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:47,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:30:47,110 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:47,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321240, now seen corresponding path program 1 times [2021-12-22 16:30:47,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:47,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578277927] [2021-12-22 16:30:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:47,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:47,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:47,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578277927] [2021-12-22 16:30:47,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578277927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:47,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:47,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-22 16:30:47,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011763604] [2021-12-22 16:30:47,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:47,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:30:47,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:47,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:30:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:47,221 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:47,439 INFO L93 Difference]: Finished difference Result 321 states and 362 transitions. [2021-12-22 16:30:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:30:47,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 16:30:47,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:47,445 INFO L225 Difference]: With dead ends: 321 [2021-12-22 16:30:47,447 INFO L226 Difference]: Without dead ends: 321 [2021-12-22 16:30:47,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:47,449 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 167 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:47,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 245 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-12-22 16:30:47,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 227. [2021-12-22 16:30:47,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 156 states have (on average 1.858974358974359) internal successors, (290), 220 states have internal predecessors, (290), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:30:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 298 transitions. [2021-12-22 16:30:47,466 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 298 transitions. Word has length 7 [2021-12-22 16:30:47,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:47,466 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 298 transitions. [2021-12-22 16:30:47,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 298 transitions. [2021-12-22 16:30:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:30:47,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:47,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:47,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:30:47,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:47,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321239, now seen corresponding path program 1 times [2021-12-22 16:30:47,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:47,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482730518] [2021-12-22 16:30:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:47,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:47,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:47,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482730518] [2021-12-22 16:30:47,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482730518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:47,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:47,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:30:47,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222313169] [2021-12-22 16:30:47,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:47,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:30:47,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:47,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:30:47,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:47,567 INFO L87 Difference]: Start difference. First operand 227 states and 298 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:47,689 INFO L93 Difference]: Finished difference Result 245 states and 316 transitions. [2021-12-22 16:30:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:30:47,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 16:30:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:47,691 INFO L225 Difference]: With dead ends: 245 [2021-12-22 16:30:47,691 INFO L226 Difference]: Without dead ends: 245 [2021-12-22 16:30:47,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:47,692 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 214 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:47,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 253 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:47,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-22 16:30:47,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2021-12-22 16:30:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 158 states have (on average 1.8544303797468353) internal successors, (293), 222 states have internal predecessors, (293), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:30:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 301 transitions. [2021-12-22 16:30:47,701 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 301 transitions. Word has length 7 [2021-12-22 16:30:47,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:47,701 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 301 transitions. [2021-12-22 16:30:47,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 301 transitions. [2021-12-22 16:30:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:30:47,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:47,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:47,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 16:30:47,702 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:47,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321301, now seen corresponding path program 1 times [2021-12-22 16:30:47,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:47,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803501400] [2021-12-22 16:30:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:47,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:47,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:47,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803501400] [2021-12-22 16:30:47,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803501400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:47,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:47,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:30:47,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722665284] [2021-12-22 16:30:47,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:47,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:30:47,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:30:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:47,802 INFO L87 Difference]: Start difference. First operand 229 states and 301 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:47,915 INFO L93 Difference]: Finished difference Result 244 states and 314 transitions. [2021-12-22 16:30:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:30:47,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 16:30:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:47,917 INFO L225 Difference]: With dead ends: 244 [2021-12-22 16:30:47,917 INFO L226 Difference]: Without dead ends: 244 [2021-12-22 16:30:47,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:47,928 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 196 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:47,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 266 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-22 16:30:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 226. [2021-12-22 16:30:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 156 states have (on average 1.8461538461538463) internal successors, (288), 219 states have internal predecessors, (288), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:30:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 296 transitions. [2021-12-22 16:30:47,971 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 296 transitions. Word has length 7 [2021-12-22 16:30:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:47,973 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 296 transitions. [2021-12-22 16:30:47,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 296 transitions. [2021-12-22 16:30:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:30:47,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:47,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:47,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 16:30:47,975 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:47,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:47,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1554740496, now seen corresponding path program 1 times [2021-12-22 16:30:47,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:47,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298822042] [2021-12-22 16:30:47,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:47,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:48,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:48,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298822042] [2021-12-22 16:30:48,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298822042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:48,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:48,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:30:48,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912034423] [2021-12-22 16:30:48,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:48,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:48,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:48,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:48,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:48,127 INFO L87 Difference]: Start difference. First operand 226 states and 296 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:48,277 INFO L93 Difference]: Finished difference Result 402 states and 517 transitions. [2021-12-22 16:30:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:30:48,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 16:30:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:48,279 INFO L225 Difference]: With dead ends: 402 [2021-12-22 16:30:48,279 INFO L226 Difference]: Without dead ends: 402 [2021-12-22 16:30:48,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:30:48,280 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 145 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:48,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 782 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-22 16:30:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2021-12-22 16:30:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 216 states have (on average 1.7916666666666667) internal successors, (387), 281 states have internal predecessors, (387), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 16:30:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 403 transitions. [2021-12-22 16:30:48,289 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 403 transitions. Word has length 10 [2021-12-22 16:30:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:48,289 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 403 transitions. [2021-12-22 16:30:48,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 403 transitions. [2021-12-22 16:30:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:30:48,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:48,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:48,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 16:30:48,291 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:48,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1552893454, now seen corresponding path program 1 times [2021-12-22 16:30:48,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:48,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358185514] [2021-12-22 16:30:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:48,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:48,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:48,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358185514] [2021-12-22 16:30:48,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358185514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:48,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:48,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:30:48,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150656692] [2021-12-22 16:30:48,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:48,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:48,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:48,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:48,382 INFO L87 Difference]: Start difference. First operand 292 states and 403 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:48,554 INFO L93 Difference]: Finished difference Result 392 states and 506 transitions. [2021-12-22 16:30:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:30:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 16:30:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:48,556 INFO L225 Difference]: With dead ends: 392 [2021-12-22 16:30:48,556 INFO L226 Difference]: Without dead ends: 392 [2021-12-22 16:30:48,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:30:48,557 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 131 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:48,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 791 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-12-22 16:30:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 292. [2021-12-22 16:30:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 216 states have (on average 1.7916666666666667) internal successors, (387), 281 states have internal predecessors, (387), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 16:30:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 403 transitions. [2021-12-22 16:30:48,563 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 403 transitions. Word has length 10 [2021-12-22 16:30:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:48,563 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 403 transitions. [2021-12-22 16:30:48,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 403 transitions. [2021-12-22 16:30:48,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 16:30:48,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:48,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:48,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 16:30:48,565 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:48,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:48,565 INFO L85 PathProgramCache]: Analyzing trace with hash 952313872, now seen corresponding path program 1 times [2021-12-22 16:30:48,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:48,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381210724] [2021-12-22 16:30:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:48,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:48,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:48,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381210724] [2021-12-22 16:30:48,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381210724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:48,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:48,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:30:48,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566987700] [2021-12-22 16:30:48,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:48,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:30:48,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:30:48,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:48,605 INFO L87 Difference]: Start difference. First operand 292 states and 403 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:48,707 INFO L93 Difference]: Finished difference Result 347 states and 456 transitions. [2021-12-22 16:30:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:30:48,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-22 16:30:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:48,709 INFO L225 Difference]: With dead ends: 347 [2021-12-22 16:30:48,709 INFO L226 Difference]: Without dead ends: 340 [2021-12-22 16:30:48,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:48,710 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 70 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:48,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 279 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:48,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-22 16:30:48,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 289. [2021-12-22 16:30:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 213 states have (on average 1.7934272300469483) internal successors, (382), 278 states have internal predecessors, (382), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 16:30:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 398 transitions. [2021-12-22 16:30:48,729 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 398 transitions. Word has length 11 [2021-12-22 16:30:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:48,729 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 398 transitions. [2021-12-22 16:30:48,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 398 transitions. [2021-12-22 16:30:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 16:30:48,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:48,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:48,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 16:30:48,731 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash -41167145, now seen corresponding path program 1 times [2021-12-22 16:30:48,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:48,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887861939] [2021-12-22 16:30:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:48,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:48,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:48,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:48,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887861939] [2021-12-22 16:30:48,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887861939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:48,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:48,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:30:48,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038480277] [2021-12-22 16:30:48,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:48,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:30:48,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:48,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:30:48,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:48,782 INFO L87 Difference]: Start difference. First operand 289 states and 398 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:49,022 INFO L93 Difference]: Finished difference Result 490 states and 599 transitions. [2021-12-22 16:30:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:30:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-22 16:30:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:49,024 INFO L225 Difference]: With dead ends: 490 [2021-12-22 16:30:49,024 INFO L226 Difference]: Without dead ends: 490 [2021-12-22 16:30:49,025 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 [2021-12-22 16:30:49,025 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 319 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:49,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 426 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-12-22 16:30:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 295. [2021-12-22 16:30:49,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 219 states have (on average 1.7716894977168949) internal successors, (388), 284 states have internal predecessors, (388), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 16:30:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 404 transitions. [2021-12-22 16:30:49,045 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 404 transitions. Word has length 15 [2021-12-22 16:30:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:49,045 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 404 transitions. [2021-12-22 16:30:49,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:49,046 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 404 transitions. [2021-12-22 16:30:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 16:30:49,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:49,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:49,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 16:30:49,047 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:49,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:49,047 INFO L85 PathProgramCache]: Analyzing trace with hash -41167144, now seen corresponding path program 1 times [2021-12-22 16:30:49,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:49,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286963565] [2021-12-22 16:30:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:49,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:49,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:49,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:49,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286963565] [2021-12-22 16:30:49,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286963565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:49,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:49,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:30:49,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481806392] [2021-12-22 16:30:49,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:49,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:30:49,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:30:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:49,123 INFO L87 Difference]: Start difference. First operand 295 states and 404 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:49,218 INFO L93 Difference]: Finished difference Result 393 states and 512 transitions. [2021-12-22 16:30:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:30:49,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-22 16:30:49,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:49,220 INFO L225 Difference]: With dead ends: 393 [2021-12-22 16:30:49,220 INFO L226 Difference]: Without dead ends: 393 [2021-12-22 16:30:49,220 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 [2021-12-22 16:30:49,220 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 343 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:49,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 270 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-22 16:30:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 292. [2021-12-22 16:30:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 219 states have (on average 1.7168949771689497) internal successors, (376), 281 states have internal predecessors, (376), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 16:30:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 392 transitions. [2021-12-22 16:30:49,226 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 392 transitions. Word has length 15 [2021-12-22 16:30:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:49,227 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 392 transitions. [2021-12-22 16:30:49,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 392 transitions. [2021-12-22 16:30:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:30:49,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:49,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:49,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 16:30:49,228 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash 85672930, now seen corresponding path program 1 times [2021-12-22 16:30:49,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:49,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472034048] [2021-12-22 16:30:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:49,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:49,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:49,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:49,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:49,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472034048] [2021-12-22 16:30:49,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472034048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:49,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:49,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:30:49,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071943398] [2021-12-22 16:30:49,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:49,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:30:49,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:49,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:30:49,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:49,316 INFO L87 Difference]: Start difference. First operand 292 states and 392 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:49,580 INFO L93 Difference]: Finished difference Result 628 states and 735 transitions. [2021-12-22 16:30:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:30:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-22 16:30:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:49,582 INFO L225 Difference]: With dead ends: 628 [2021-12-22 16:30:49,582 INFO L226 Difference]: Without dead ends: 628 [2021-12-22 16:30:49,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:30:49,583 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 763 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:49,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 538 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-12-22 16:30:49,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 289. [2021-12-22 16:30:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 278 states have internal predecessors, (370), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 16:30:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 386 transitions. [2021-12-22 16:30:49,589 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 386 transitions. Word has length 17 [2021-12-22 16:30:49,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:49,589 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 386 transitions. [2021-12-22 16:30:49,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:49,589 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 386 transitions. [2021-12-22 16:30:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:30:49,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:49,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:49,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 16:30:49,590 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:49,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:49,590 INFO L85 PathProgramCache]: Analyzing trace with hash 85672931, now seen corresponding path program 1 times [2021-12-22 16:30:49,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:49,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378662198] [2021-12-22 16:30:49,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:49,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:49,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:49,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:49,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378662198] [2021-12-22 16:30:49,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378662198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:49,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:49,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:30:49,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425373709] [2021-12-22 16:30:49,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:49,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:49,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:49,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:49,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:49,662 INFO L87 Difference]: Start difference. First operand 289 states and 386 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:49,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:49,926 INFO L93 Difference]: Finished difference Result 594 states and 794 transitions. [2021-12-22 16:30:49,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:30:49,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-22 16:30:49,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:49,929 INFO L225 Difference]: With dead ends: 594 [2021-12-22 16:30:49,929 INFO L226 Difference]: Without dead ends: 594 [2021-12-22 16:30:49,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:30:49,929 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 538 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:49,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 698 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-12-22 16:30:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 351. [2021-12-22 16:30:49,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 278 states have (on average 1.6654676258992807) internal successors, (463), 338 states have internal predecessors, (463), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 487 transitions. [2021-12-22 16:30:49,944 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 487 transitions. Word has length 17 [2021-12-22 16:30:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:49,945 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 487 transitions. [2021-12-22 16:30:49,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 487 transitions. [2021-12-22 16:30:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:30:49,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:49,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:49,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 16:30:49,946 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:49,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1721781532, now seen corresponding path program 1 times [2021-12-22 16:30:49,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:49,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578077325] [2021-12-22 16:30:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:49,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:49,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:49,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578077325] [2021-12-22 16:30:49,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578077325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:49,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:49,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:30:49,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044220116] [2021-12-22 16:30:49,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:49,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:49,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:49,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:49,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:49,996 INFO L87 Difference]: Start difference. First operand 351 states and 487 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:50,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:50,026 INFO L93 Difference]: Finished difference Result 559 states and 756 transitions. [2021-12-22 16:30:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:30:50,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-22 16:30:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:50,028 INFO L225 Difference]: With dead ends: 559 [2021-12-22 16:30:50,029 INFO L226 Difference]: Without dead ends: 559 [2021-12-22 16:30:50,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:30:50,029 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 231 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:50,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1493 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:30:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-12-22 16:30:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 351. [2021-12-22 16:30:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 278 states have (on average 1.658273381294964) internal successors, (461), 338 states have internal predecessors, (461), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 485 transitions. [2021-12-22 16:30:50,037 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 485 transitions. Word has length 17 [2021-12-22 16:30:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:50,038 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 485 transitions. [2021-12-22 16:30:50,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 485 transitions. [2021-12-22 16:30:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 16:30:50,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:50,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:50,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 16:30:50,039 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:50,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1835564363, now seen corresponding path program 1 times [2021-12-22 16:30:50,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:50,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922440428] [2021-12-22 16:30:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:50,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:50,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:50,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:50,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922440428] [2021-12-22 16:30:50,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922440428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:50,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:50,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:30:50,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854834978] [2021-12-22 16:30:50,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:50,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:50,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:50,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:50,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:50,105 INFO L87 Difference]: Start difference. First operand 351 states and 485 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:50,385 INFO L93 Difference]: Finished difference Result 635 states and 863 transitions. [2021-12-22 16:30:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:30:50,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-22 16:30:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:50,387 INFO L225 Difference]: With dead ends: 635 [2021-12-22 16:30:50,388 INFO L226 Difference]: Without dead ends: 635 [2021-12-22 16:30:50,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:30:50,388 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 450 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:50,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 836 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-12-22 16:30:50,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 346. [2021-12-22 16:30:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 273 states have (on average 1.6593406593406594) internal successors, (453), 333 states have internal predecessors, (453), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 477 transitions. [2021-12-22 16:30:50,396 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 477 transitions. Word has length 18 [2021-12-22 16:30:50,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:50,396 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 477 transitions. [2021-12-22 16:30:50,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:50,397 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 477 transitions. [2021-12-22 16:30:50,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 16:30:50,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:50,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:50,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 16:30:50,398 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:50,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:50,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1066754491, now seen corresponding path program 1 times [2021-12-22 16:30:50,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:50,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404712877] [2021-12-22 16:30:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:50,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:50,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:50,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:50,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404712877] [2021-12-22 16:30:50,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404712877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:50,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:50,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 16:30:50,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799090280] [2021-12-22 16:30:50,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:50,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:30:50,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:50,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:30:50,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:30:50,629 INFO L87 Difference]: Start difference. First operand 346 states and 477 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:51,144 INFO L93 Difference]: Finished difference Result 712 states and 967 transitions. [2021-12-22 16:30:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:30:51,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-22 16:30:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:51,147 INFO L225 Difference]: With dead ends: 712 [2021-12-22 16:30:51,147 INFO L226 Difference]: Without dead ends: 710 [2021-12-22 16:30:51,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:30:51,147 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 518 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:51,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1628 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-22 16:30:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 340. [2021-12-22 16:30:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 267 states have (on average 1.655430711610487) internal successors, (442), 327 states have internal predecessors, (442), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 466 transitions. [2021-12-22 16:30:51,156 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 466 transitions. Word has length 21 [2021-12-22 16:30:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:51,156 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 466 transitions. [2021-12-22 16:30:51,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 466 transitions. [2021-12-22 16:30:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 16:30:51,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:51,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:51,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 16:30:51,159 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1136706200, now seen corresponding path program 1 times [2021-12-22 16:30:51,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:51,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975191406] [2021-12-22 16:30:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:51,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:51,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:51,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:51,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975191406] [2021-12-22 16:30:51,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975191406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:51,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:51,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 16:30:51,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690054047] [2021-12-22 16:30:51,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:51,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:30:51,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:51,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:30:51,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:30:51,361 INFO L87 Difference]: Start difference. First operand 340 states and 466 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:51,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:51,602 INFO L93 Difference]: Finished difference Result 496 states and 644 transitions. [2021-12-22 16:30:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:30:51,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-22 16:30:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:51,604 INFO L225 Difference]: With dead ends: 496 [2021-12-22 16:30:51,604 INFO L226 Difference]: Without dead ends: 496 [2021-12-22 16:30:51,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:30:51,605 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 207 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:51,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 907 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-22 16:30:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 356. [2021-12-22 16:30:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 283 states have (on average 1.6289752650176679) internal successors, (461), 341 states have internal predecessors, (461), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 485 transitions. [2021-12-22 16:30:51,612 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 485 transitions. Word has length 21 [2021-12-22 16:30:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:51,612 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 485 transitions. [2021-12-22 16:30:51,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 485 transitions. [2021-12-22 16:30:51,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 16:30:51,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:51,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:51,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 16:30:51,613 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:51,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:51,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1088554597, now seen corresponding path program 1 times [2021-12-22 16:30:51,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:51,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811502870] [2021-12-22 16:30:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:51,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:51,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:51,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811502870] [2021-12-22 16:30:51,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811502870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:51,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:51,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:30:51,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72368242] [2021-12-22 16:30:51,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:51,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:51,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:51,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:51,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:51,658 INFO L87 Difference]: Start difference. First operand 356 states and 485 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:51,686 INFO L93 Difference]: Finished difference Result 610 states and 833 transitions. [2021-12-22 16:30:51,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:30:51,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-22 16:30:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:51,688 INFO L225 Difference]: With dead ends: 610 [2021-12-22 16:30:51,688 INFO L226 Difference]: Without dead ends: 610 [2021-12-22 16:30:51,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:30:51,689 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 233 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:51,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1199 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:30:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-22 16:30:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 358. [2021-12-22 16:30:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 285 states have (on average 1.6245614035087719) internal successors, (463), 343 states have internal predecessors, (463), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 487 transitions. [2021-12-22 16:30:51,711 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 487 transitions. Word has length 22 [2021-12-22 16:30:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:51,712 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 487 transitions. [2021-12-22 16:30:51,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 487 transitions. [2021-12-22 16:30:51,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 16:30:51,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:51,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:51,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 16:30:51,713 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash 686452765, now seen corresponding path program 1 times [2021-12-22 16:30:51,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:51,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319060047] [2021-12-22 16:30:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:51,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:51,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:51,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:51,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319060047] [2021-12-22 16:30:51,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319060047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:51,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:51,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:30:51,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838269808] [2021-12-22 16:30:51,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:51,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:51,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:51,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:51,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:51,772 INFO L87 Difference]: Start difference. First operand 358 states and 487 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:51,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:51,800 INFO L93 Difference]: Finished difference Result 606 states and 825 transitions. [2021-12-22 16:30:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:30:51,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-22 16:30:51,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:51,803 INFO L225 Difference]: With dead ends: 606 [2021-12-22 16:30:51,803 INFO L226 Difference]: Without dead ends: 606 [2021-12-22 16:30:51,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:30:51,803 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 230 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:51,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1215 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:30:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-12-22 16:30:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 356. [2021-12-22 16:30:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 283 states have (on average 1.6148409893992932) internal successors, (457), 341 states have internal predecessors, (457), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 481 transitions. [2021-12-22 16:30:51,811 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 481 transitions. Word has length 22 [2021-12-22 16:30:51,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:51,811 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 481 transitions. [2021-12-22 16:30:51,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 481 transitions. [2021-12-22 16:30:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 16:30:51,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:51,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:51,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 16:30:51,812 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:51,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1594113222, now seen corresponding path program 1 times [2021-12-22 16:30:51,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:51,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451376657] [2021-12-22 16:30:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:51,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:51,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:51,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:51,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451376657] [2021-12-22 16:30:51,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451376657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:51,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:51,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 16:30:51,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978024618] [2021-12-22 16:30:51,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:51,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:30:51,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:30:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:30:51,893 INFO L87 Difference]: Start difference. First operand 356 states and 481 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:52,163 INFO L93 Difference]: Finished difference Result 540 states and 714 transitions. [2021-12-22 16:30:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:30:52,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-22 16:30:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:52,165 INFO L225 Difference]: With dead ends: 540 [2021-12-22 16:30:52,166 INFO L226 Difference]: Without dead ends: 540 [2021-12-22 16:30:52,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:30:52,166 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 191 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:52,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1156 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:52,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-22 16:30:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 366. [2021-12-22 16:30:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 293 states have (on average 1.6006825938566553) internal successors, (469), 349 states have internal predecessors, (469), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 493 transitions. [2021-12-22 16:30:52,182 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 493 transitions. Word has length 22 [2021-12-22 16:30:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:52,182 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 493 transitions. [2021-12-22 16:30:52,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 493 transitions. [2021-12-22 16:30:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 16:30:52,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:52,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:52,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 16:30:52,183 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1338476602, now seen corresponding path program 1 times [2021-12-22 16:30:52,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:52,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760373325] [2021-12-22 16:30:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:52,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:52,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:52,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:52,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760373325] [2021-12-22 16:30:52,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760373325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:52,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:52,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:30:52,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467927177] [2021-12-22 16:30:52,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:52,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:30:52,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:52,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:30:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:52,235 INFO L87 Difference]: Start difference. First operand 366 states and 493 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:52,461 INFO L93 Difference]: Finished difference Result 583 states and 733 transitions. [2021-12-22 16:30:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:30:52,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-22 16:30:52,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:52,463 INFO L225 Difference]: With dead ends: 583 [2021-12-22 16:30:52,463 INFO L226 Difference]: Without dead ends: 583 [2021-12-22 16:30:52,463 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 [2021-12-22 16:30:52,463 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 287 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:52,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 425 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-12-22 16:30:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 384. [2021-12-22 16:30:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 311 states have (on average 1.617363344051447) internal successors, (503), 367 states have internal predecessors, (503), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 527 transitions. [2021-12-22 16:30:52,481 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 527 transitions. Word has length 23 [2021-12-22 16:30:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:52,482 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 527 transitions. [2021-12-22 16:30:52,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 527 transitions. [2021-12-22 16:30:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 16:30:52,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:52,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:52,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 16:30:52,483 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:52,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1338476601, now seen corresponding path program 1 times [2021-12-22 16:30:52,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:52,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268884724] [2021-12-22 16:30:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:52,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:52,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:52,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:52,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268884724] [2021-12-22 16:30:52,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268884724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:52,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:52,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:30:52,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410290380] [2021-12-22 16:30:52,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:52,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:52,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:52,625 INFO L87 Difference]: Start difference. First operand 384 states and 527 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:52,837 INFO L93 Difference]: Finished difference Result 516 states and 688 transitions. [2021-12-22 16:30:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:30:52,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-22 16:30:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:52,839 INFO L225 Difference]: With dead ends: 516 [2021-12-22 16:30:52,840 INFO L226 Difference]: Without dead ends: 516 [2021-12-22 16:30:52,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:30:52,841 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 642 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:52,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 324 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-22 16:30:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 381. [2021-12-22 16:30:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 311 states have (on average 1.5787781350482315) internal successors, (491), 364 states have internal predecessors, (491), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 515 transitions. [2021-12-22 16:30:52,857 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 515 transitions. Word has length 23 [2021-12-22 16:30:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:52,857 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 515 transitions. [2021-12-22 16:30:52,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 515 transitions. [2021-12-22 16:30:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 16:30:52,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:52,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:52,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 16:30:52,858 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:52,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:52,858 INFO L85 PathProgramCache]: Analyzing trace with hash -740334691, now seen corresponding path program 1 times [2021-12-22 16:30:52,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:52,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602710571] [2021-12-22 16:30:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:52,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:52,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:52,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:52,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602710571] [2021-12-22 16:30:52,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602710571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:52,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:52,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:30:52,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594208575] [2021-12-22 16:30:52,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:52,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:30:52,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:30:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:52,894 INFO L87 Difference]: Start difference. First operand 381 states and 515 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:52,907 INFO L93 Difference]: Finished difference Result 397 states and 531 transitions. [2021-12-22 16:30:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:30:52,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-22 16:30:52,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:52,908 INFO L225 Difference]: With dead ends: 397 [2021-12-22 16:30:52,908 INFO L226 Difference]: Without dead ends: 397 [2021-12-22 16:30:52,908 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 [2021-12-22 16:30:52,909 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 3 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:52,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:30:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-22 16:30:52,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2021-12-22 16:30:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 323 states have (on average 1.5572755417956656) internal successors, (503), 376 states have internal predecessors, (503), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 527 transitions. [2021-12-22 16:30:52,918 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 527 transitions. Word has length 25 [2021-12-22 16:30:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:52,919 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 527 transitions. [2021-12-22 16:30:52,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 527 transitions. [2021-12-22 16:30:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 16:30:52,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:52,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:52,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 16:30:52,920 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:52,921 INFO L85 PathProgramCache]: Analyzing trace with hash -738487649, now seen corresponding path program 1 times [2021-12-22 16:30:52,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:52,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556557817] [2021-12-22 16:30:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:52,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:52,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:52,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:52,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556557817] [2021-12-22 16:30:52,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556557817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:52,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:52,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:30:52,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731590462] [2021-12-22 16:30:52,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:52,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:30:52,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:52,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:30:52,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:52,966 INFO L87 Difference]: Start difference. First operand 393 states and 527 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:53,103 INFO L93 Difference]: Finished difference Result 770 states and 1027 transitions. [2021-12-22 16:30:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:30:53,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-22 16:30:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:53,105 INFO L225 Difference]: With dead ends: 770 [2021-12-22 16:30:53,105 INFO L226 Difference]: Without dead ends: 770 [2021-12-22 16:30:53,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:53,107 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 319 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:53,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 522 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:53,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-12-22 16:30:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 469. [2021-12-22 16:30:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 399 states have (on average 1.5413533834586466) internal successors, (615), 452 states have internal predecessors, (615), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 639 transitions. [2021-12-22 16:30:53,118 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 639 transitions. Word has length 25 [2021-12-22 16:30:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:53,118 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 639 transitions. [2021-12-22 16:30:53,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,119 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 639 transitions. [2021-12-22 16:30:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 16:30:53,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:53,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:53,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 16:30:53,119 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:53,120 INFO L85 PathProgramCache]: Analyzing trace with hash -738487650, now seen corresponding path program 1 times [2021-12-22 16:30:53,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:53,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868285232] [2021-12-22 16:30:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:53,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:53,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:53,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868285232] [2021-12-22 16:30:53,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868285232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:53,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:53,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:30:53,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016142904] [2021-12-22 16:30:53,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:53,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:30:53,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:53,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:30:53,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:53,143 INFO L87 Difference]: Start difference. First operand 469 states and 639 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:53,223 INFO L93 Difference]: Finished difference Result 560 states and 741 transitions. [2021-12-22 16:30:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:30:53,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-22 16:30:53,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:53,225 INFO L225 Difference]: With dead ends: 560 [2021-12-22 16:30:53,226 INFO L226 Difference]: Without dead ends: 560 [2021-12-22 16:30:53,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:53,226 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 139 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:53,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 257 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:53,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-12-22 16:30:53,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 467. [2021-12-22 16:30:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 399 states have (on average 1.5112781954887218) internal successors, (603), 450 states have internal predecessors, (603), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 627 transitions. [2021-12-22 16:30:53,237 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 627 transitions. Word has length 25 [2021-12-22 16:30:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:53,237 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 627 transitions. [2021-12-22 16:30:53,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,237 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 627 transitions. [2021-12-22 16:30:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:30:53,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:53,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:53,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 16:30:53,239 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1484578673, now seen corresponding path program 1 times [2021-12-22 16:30:53,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:53,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920838500] [2021-12-22 16:30:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:53,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:53,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:53,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920838500] [2021-12-22 16:30:53,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920838500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:53,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:53,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:30:53,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331955956] [2021-12-22 16:30:53,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:53,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:30:53,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:30:53,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:53,273 INFO L87 Difference]: Start difference. First operand 467 states and 627 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:53,433 INFO L93 Difference]: Finished difference Result 842 states and 1119 transitions. [2021-12-22 16:30:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:30:53,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-22 16:30:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:53,435 INFO L225 Difference]: With dead ends: 842 [2021-12-22 16:30:53,436 INFO L226 Difference]: Without dead ends: 842 [2021-12-22 16:30:53,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:53,437 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 305 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:53,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 532 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-12-22 16:30:53,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 467. [2021-12-22 16:30:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 399 states have (on average 1.5112781954887218) internal successors, (603), 450 states have internal predecessors, (603), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 627 transitions. [2021-12-22 16:30:53,446 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 627 transitions. Word has length 26 [2021-12-22 16:30:53,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:53,446 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 627 transitions. [2021-12-22 16:30:53,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 627 transitions. [2021-12-22 16:30:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:30:53,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:53,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:53,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 16:30:53,447 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:53,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:53,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2109324045, now seen corresponding path program 1 times [2021-12-22 16:30:53,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:53,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95773402] [2021-12-22 16:30:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:53,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:53,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:53,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95773402] [2021-12-22 16:30:53,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95773402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:53,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:53,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:30:53,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572081216] [2021-12-22 16:30:53,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:53,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:53,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:53,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:53,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:53,497 INFO L87 Difference]: Start difference. First operand 467 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:53,522 INFO L93 Difference]: Finished difference Result 666 states and 882 transitions. [2021-12-22 16:30:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:30:53,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-22 16:30:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:53,524 INFO L225 Difference]: With dead ends: 666 [2021-12-22 16:30:53,525 INFO L226 Difference]: Without dead ends: 666 [2021-12-22 16:30:53,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:30:53,525 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 222 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:53,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1436 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:30:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-12-22 16:30:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 390. [2021-12-22 16:30:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 323 states have (on average 1.5077399380804954) internal successors, (487), 373 states have internal predecessors, (487), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 511 transitions. [2021-12-22 16:30:53,532 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 511 transitions. Word has length 26 [2021-12-22 16:30:53,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:53,532 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 511 transitions. [2021-12-22 16:30:53,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 511 transitions. [2021-12-22 16:30:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 16:30:53,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:53,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:53,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 16:30:53,533 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1817784781, now seen corresponding path program 1 times [2021-12-22 16:30:53,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:53,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670843450] [2021-12-22 16:30:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:53,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:53,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:53,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670843450] [2021-12-22 16:30:53,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670843450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:53,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:53,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:30:53,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288636175] [2021-12-22 16:30:53,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:53,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:30:53,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:53,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:30:53,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:53,577 INFO L87 Difference]: Start difference. First operand 390 states and 511 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:53,687 INFO L93 Difference]: Finished difference Result 472 states and 596 transitions. [2021-12-22 16:30:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:30:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-22 16:30:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:53,688 INFO L225 Difference]: With dead ends: 472 [2021-12-22 16:30:53,688 INFO L226 Difference]: Without dead ends: 472 [2021-12-22 16:30:53,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:30:53,689 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 163 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:53,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 626 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-22 16:30:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 390. [2021-12-22 16:30:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 323 states have (on average 1.5046439628482973) internal successors, (486), 373 states have internal predecessors, (486), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 510 transitions. [2021-12-22 16:30:53,694 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 510 transitions. Word has length 27 [2021-12-22 16:30:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:53,694 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 510 transitions. [2021-12-22 16:30:53,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 510 transitions. [2021-12-22 16:30:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 16:30:53,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:53,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:53,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 16:30:53,695 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:53,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1017025601, now seen corresponding path program 1 times [2021-12-22 16:30:53,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:53,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650846330] [2021-12-22 16:30:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:53,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:53,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:53,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650846330] [2021-12-22 16:30:53,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650846330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:53,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:53,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 16:30:53,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765481609] [2021-12-22 16:30:53,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:53,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:30:53,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:30:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:30:53,741 INFO L87 Difference]: Start difference. First operand 390 states and 510 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:53,894 INFO L93 Difference]: Finished difference Result 589 states and 763 transitions. [2021-12-22 16:30:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:30:53,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-22 16:30:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:53,896 INFO L225 Difference]: With dead ends: 589 [2021-12-22 16:30:53,896 INFO L226 Difference]: Without dead ends: 589 [2021-12-22 16:30:53,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:30:53,897 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 149 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:53,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1213 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-12-22 16:30:53,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 422. [2021-12-22 16:30:53,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 355 states have (on average 1.476056338028169) internal successors, (524), 405 states have internal predecessors, (524), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 548 transitions. [2021-12-22 16:30:53,903 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 548 transitions. Word has length 27 [2021-12-22 16:30:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:53,903 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 548 transitions. [2021-12-22 16:30:53,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 548 transitions. [2021-12-22 16:30:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 16:30:53,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:53,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:53,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 16:30:53,904 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:53,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1017025407, now seen corresponding path program 1 times [2021-12-22 16:30:53,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:53,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658359049] [2021-12-22 16:30:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:53,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:53,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:53,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658359049] [2021-12-22 16:30:53,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658359049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:53,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:53,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:30:53,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149619797] [2021-12-22 16:30:53,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:53,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:30:53,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:30:53,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:53,950 INFO L87 Difference]: Start difference. First operand 422 states and 548 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:54,078 INFO L93 Difference]: Finished difference Result 828 states and 1070 transitions. [2021-12-22 16:30:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:30:54,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-22 16:30:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:54,080 INFO L225 Difference]: With dead ends: 828 [2021-12-22 16:30:54,080 INFO L226 Difference]: Without dead ends: 828 [2021-12-22 16:30:54,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:54,081 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 440 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:54,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 731 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-12-22 16:30:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 538. [2021-12-22 16:30:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 471 states have (on average 1.4564755838641188) internal successors, (686), 521 states have internal predecessors, (686), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 710 transitions. [2021-12-22 16:30:54,089 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 710 transitions. Word has length 27 [2021-12-22 16:30:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:54,089 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 710 transitions. [2021-12-22 16:30:54,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 710 transitions. [2021-12-22 16:30:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 16:30:54,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:54,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:54,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 16:30:54,090 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:54,091 INFO L85 PathProgramCache]: Analyzing trace with hash 516753601, now seen corresponding path program 1 times [2021-12-22 16:30:54,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:54,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422946029] [2021-12-22 16:30:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:54,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:54,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:54,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422946029] [2021-12-22 16:30:54,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422946029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:54,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:54,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:30:54,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346936435] [2021-12-22 16:30:54,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:54,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:30:54,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:54,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:30:54,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:54,145 INFO L87 Difference]: Start difference. First operand 538 states and 710 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:54,285 INFO L93 Difference]: Finished difference Result 783 states and 1007 transitions. [2021-12-22 16:30:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:30:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-22 16:30:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:54,288 INFO L225 Difference]: With dead ends: 783 [2021-12-22 16:30:54,288 INFO L226 Difference]: Without dead ends: 783 [2021-12-22 16:30:54,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:30:54,288 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 218 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:54,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 635 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-12-22 16:30:54,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 576. [2021-12-22 16:30:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 505 states have (on average 1.4574257425742574) internal successors, (736), 557 states have internal predecessors, (736), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 16:30:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 766 transitions. [2021-12-22 16:30:54,302 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 766 transitions. Word has length 28 [2021-12-22 16:30:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:54,302 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 766 transitions. [2021-12-22 16:30:54,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 766 transitions. [2021-12-22 16:30:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 16:30:54,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:54,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:54,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 16:30:54,303 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:54,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash 750963923, now seen corresponding path program 1 times [2021-12-22 16:30:54,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:54,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379030218] [2021-12-22 16:30:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:54,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:54,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:54,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:54,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379030218] [2021-12-22 16:30:54,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379030218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:54,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:54,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:30:54,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560389275] [2021-12-22 16:30:54,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:54,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:30:54,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:54,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:30:54,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:54,340 INFO L87 Difference]: Start difference. First operand 576 states and 766 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:54,459 INFO L93 Difference]: Finished difference Result 865 states and 1118 transitions. [2021-12-22 16:30:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:30:54,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-22 16:30:54,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:54,462 INFO L225 Difference]: With dead ends: 865 [2021-12-22 16:30:54,462 INFO L226 Difference]: Without dead ends: 865 [2021-12-22 16:30:54,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:54,462 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 302 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:54,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 509 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-12-22 16:30:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 459. [2021-12-22 16:30:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 389 states have (on average 1.455012853470437) internal successors, (566), 440 states have internal predecessors, (566), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 16:30:54,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 596 transitions. [2021-12-22 16:30:54,470 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 596 transitions. Word has length 28 [2021-12-22 16:30:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:54,470 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 596 transitions. [2021-12-22 16:30:54,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 596 transitions. [2021-12-22 16:30:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 16:30:54,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:54,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:54,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 16:30:54,471 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:54,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:54,472 INFO L85 PathProgramCache]: Analyzing trace with hash -933658936, now seen corresponding path program 1 times [2021-12-22 16:30:54,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:54,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585291086] [2021-12-22 16:30:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:54,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:54,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:54,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:54,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585291086] [2021-12-22 16:30:54,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585291086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:54,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:54,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:30:54,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577242112] [2021-12-22 16:30:54,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:54,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:30:54,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:54,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:30:54,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:54,514 INFO L87 Difference]: Start difference. First operand 459 states and 596 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:54,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:54,545 INFO L93 Difference]: Finished difference Result 929 states and 1212 transitions. [2021-12-22 16:30:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:30:54,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 16:30:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:54,547 INFO L225 Difference]: With dead ends: 929 [2021-12-22 16:30:54,548 INFO L226 Difference]: Without dead ends: 929 [2021-12-22 16:30:54,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:54,548 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 232 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:54,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 938 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:30:54,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-12-22 16:30:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 534. [2021-12-22 16:30:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 464 states have (on average 1.4504310344827587) internal successors, (673), 510 states have internal predecessors, (673), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 18 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 16:30:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 703 transitions. [2021-12-22 16:30:54,556 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 703 transitions. Word has length 30 [2021-12-22 16:30:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:54,556 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 703 transitions. [2021-12-22 16:30:54,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 703 transitions. [2021-12-22 16:30:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 16:30:54,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:54,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:54,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 16:30:54,557 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash -933657014, now seen corresponding path program 1 times [2021-12-22 16:30:54,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:54,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324196279] [2021-12-22 16:30:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:54,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:54,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:54,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:54,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324196279] [2021-12-22 16:30:54,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324196279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:54,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:54,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:30:54,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859351711] [2021-12-22 16:30:54,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:54,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:30:54,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:54,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:30:54,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:30:54,619 INFO L87 Difference]: Start difference. First operand 534 states and 703 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:54,853 INFO L93 Difference]: Finished difference Result 1132 states and 1464 transitions. [2021-12-22 16:30:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:30:54,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 16:30:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:54,857 INFO L225 Difference]: With dead ends: 1132 [2021-12-22 16:30:54,857 INFO L226 Difference]: Without dead ends: 1132 [2021-12-22 16:30:54,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:30:54,859 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 501 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:54,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 1638 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-12-22 16:30:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 552. [2021-12-22 16:30:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 482 states have (on average 1.450207468879668) internal successors, (699), 528 states have internal predecessors, (699), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 18 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-22 16:30:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 729 transitions. [2021-12-22 16:30:54,869 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 729 transitions. Word has length 30 [2021-12-22 16:30:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:54,869 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 729 transitions. [2021-12-22 16:30:54,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 729 transitions. [2021-12-22 16:30:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 16:30:54,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:54,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:54,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-22 16:30:54,870 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:54,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1615988093, now seen corresponding path program 1 times [2021-12-22 16:30:54,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:54,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266044983] [2021-12-22 16:30:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:54,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:54,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:54,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:54,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266044983] [2021-12-22 16:30:54,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266044983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:54,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:54,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:30:54,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698123481] [2021-12-22 16:30:54,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:54,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:54,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:54,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:54,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:54,972 INFO L87 Difference]: Start difference. First operand 552 states and 729 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:55,363 INFO L93 Difference]: Finished difference Result 1036 states and 1327 transitions. [2021-12-22 16:30:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:30:55,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 16:30:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:55,367 INFO L225 Difference]: With dead ends: 1036 [2021-12-22 16:30:55,368 INFO L226 Difference]: Without dead ends: 1036 [2021-12-22 16:30:55,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:30:55,368 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 461 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:55,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 994 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:30:55,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-12-22 16:30:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 592. [2021-12-22 16:30:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 518 states have (on average 1.4343629343629343) internal successors, (743), 565 states have internal predecessors, (743), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 16:30:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 779 transitions. [2021-12-22 16:30:55,380 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 779 transitions. Word has length 30 [2021-12-22 16:30:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:55,380 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 779 transitions. [2021-12-22 16:30:55,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:55,380 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 779 transitions. [2021-12-22 16:30:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 16:30:55,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:55,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:55,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-22 16:30:55,381 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:55,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1342481239, now seen corresponding path program 1 times [2021-12-22 16:30:55,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:55,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487013731] [2021-12-22 16:30:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:55,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:55,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:55,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:55,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487013731] [2021-12-22 16:30:55,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487013731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:55,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:55,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:30:55,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331181363] [2021-12-22 16:30:55,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:55,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:30:55,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:30:55,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:55,426 INFO L87 Difference]: Start difference. First operand 592 states and 779 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:55,451 INFO L93 Difference]: Finished difference Result 952 states and 1240 transitions. [2021-12-22 16:30:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:30:55,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 16:30:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:55,453 INFO L225 Difference]: With dead ends: 952 [2021-12-22 16:30:55,454 INFO L226 Difference]: Without dead ends: 952 [2021-12-22 16:30:55,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:55,454 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 211 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:55,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1081 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:30:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-12-22 16:30:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 588. [2021-12-22 16:30:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 514 states have (on average 1.433852140077821) internal successors, (737), 561 states have internal predecessors, (737), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 16:30:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 773 transitions. [2021-12-22 16:30:55,463 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 773 transitions. Word has length 30 [2021-12-22 16:30:55,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:55,464 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 773 transitions. [2021-12-22 16:30:55,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 773 transitions. [2021-12-22 16:30:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 16:30:55,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:55,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:55,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-22 16:30:55,465 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:55,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1340636119, now seen corresponding path program 1 times [2021-12-22 16:30:55,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:55,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254401979] [2021-12-22 16:30:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:55,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:55,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:55,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254401979] [2021-12-22 16:30:55,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254401979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:55,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:55,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:30:55,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118930401] [2021-12-22 16:30:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:55,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:30:55,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:55,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:30:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:30:55,526 INFO L87 Difference]: Start difference. First operand 588 states and 773 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:55,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:55,736 INFO L93 Difference]: Finished difference Result 1169 states and 1513 transitions. [2021-12-22 16:30:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:30:55,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 16:30:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:55,739 INFO L225 Difference]: With dead ends: 1169 [2021-12-22 16:30:55,739 INFO L226 Difference]: Without dead ends: 1169 [2021-12-22 16:30:55,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:30:55,740 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 501 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:55,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 1667 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:55,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-12-22 16:30:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 572. [2021-12-22 16:30:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 500 states have (on average 1.414) internal successors, (707), 545 states have internal predecessors, (707), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 16:30:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 743 transitions. [2021-12-22 16:30:55,749 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 743 transitions. Word has length 30 [2021-12-22 16:30:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:55,749 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 743 transitions. [2021-12-22 16:30:55,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 743 transitions. [2021-12-22 16:30:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 16:30:55,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:55,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:55,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-22 16:30:55,750 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:55,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:55,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1443976913, now seen corresponding path program 1 times [2021-12-22 16:30:55,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:55,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730811907] [2021-12-22 16:30:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:55,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:55,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:55,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:55,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730811907] [2021-12-22 16:30:55,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730811907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:55,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:55,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:30:55,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382539675] [2021-12-22 16:30:55,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:55,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:30:55,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:55,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:30:55,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:30:55,858 INFO L87 Difference]: Start difference. First operand 572 states and 743 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:56,185 INFO L93 Difference]: Finished difference Result 953 states and 1201 transitions. [2021-12-22 16:30:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:30:56,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-12-22 16:30:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:56,189 INFO L225 Difference]: With dead ends: 953 [2021-12-22 16:30:56,189 INFO L226 Difference]: Without dead ends: 953 [2021-12-22 16:30:56,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:30:56,190 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 742 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:56,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 603 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-12-22 16:30:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 571. [2021-12-22 16:30:56,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 500 states have (on average 1.406) internal successors, (703), 544 states have internal predecessors, (703), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 16:30:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 739 transitions. [2021-12-22 16:30:56,197 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 739 transitions. Word has length 31 [2021-12-22 16:30:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:56,197 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 739 transitions. [2021-12-22 16:30:56,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:56,197 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 739 transitions. [2021-12-22 16:30:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 16:30:56,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:56,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:56,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-22 16:30:56,198 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:56,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash 403780234, now seen corresponding path program 1 times [2021-12-22 16:30:56,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:56,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119204057] [2021-12-22 16:30:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:56,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:56,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:56,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:56,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119204057] [2021-12-22 16:30:56,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119204057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:56,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:56,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:30:56,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289410767] [2021-12-22 16:30:56,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:56,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:56,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:56,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:56,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:56,341 INFO L87 Difference]: Start difference. First operand 571 states and 739 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:56,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:56,547 INFO L93 Difference]: Finished difference Result 618 states and 786 transitions. [2021-12-22 16:30:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:30:56,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-12-22 16:30:56,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:56,549 INFO L225 Difference]: With dead ends: 618 [2021-12-22 16:30:56,549 INFO L226 Difference]: Without dead ends: 618 [2021-12-22 16:30:56,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:30:56,549 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 106 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:56,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 794 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:56,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-12-22 16:30:56,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 550. [2021-12-22 16:30:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 479 states have (on average 1.4112734864300627) internal successors, (676), 525 states have internal predecessors, (676), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 16:30:56,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 712 transitions. [2021-12-22 16:30:56,555 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 712 transitions. Word has length 32 [2021-12-22 16:30:56,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:56,555 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 712 transitions. [2021-12-22 16:30:56,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 712 transitions. [2021-12-22 16:30:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 16:30:56,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:56,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:56,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-22 16:30:56,556 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 407119085, now seen corresponding path program 1 times [2021-12-22 16:30:56,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:56,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590168177] [2021-12-22 16:30:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:56,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:56,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:56,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:56,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590168177] [2021-12-22 16:30:56,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590168177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:56,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:56,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:30:56,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774729085] [2021-12-22 16:30:56,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:56,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:30:56,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:30:56,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:56,617 INFO L87 Difference]: Start difference. First operand 550 states and 712 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:56,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:56,711 INFO L93 Difference]: Finished difference Result 669 states and 856 transitions. [2021-12-22 16:30:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:30:56,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-12-22 16:30:56,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:56,713 INFO L225 Difference]: With dead ends: 669 [2021-12-22 16:30:56,713 INFO L226 Difference]: Without dead ends: 669 [2021-12-22 16:30:56,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:30:56,714 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 354 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:56,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 508 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:56,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-22 16:30:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 549. [2021-12-22 16:30:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 479 states have (on average 1.407098121085595) internal successors, (674), 524 states have internal predecessors, (674), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 16:30:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 710 transitions. [2021-12-22 16:30:56,721 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 710 transitions. Word has length 33 [2021-12-22 16:30:56,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:56,721 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 710 transitions. [2021-12-22 16:30:56,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:56,721 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 710 transitions. [2021-12-22 16:30:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 16:30:56,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:56,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:56,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-22 16:30:56,722 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:56,722 INFO L85 PathProgramCache]: Analyzing trace with hash 407119084, now seen corresponding path program 1 times [2021-12-22 16:30:56,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:56,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945918485] [2021-12-22 16:30:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:56,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:56,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:56,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:56,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945918485] [2021-12-22 16:30:56,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945918485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:56,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:56,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:30:56,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772806484] [2021-12-22 16:30:56,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:56,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:30:56,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:30:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:56,752 INFO L87 Difference]: Start difference. First operand 549 states and 710 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:56,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:56,868 INFO L93 Difference]: Finished difference Result 663 states and 848 transitions. [2021-12-22 16:30:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:30:56,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-12-22 16:30:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:56,877 INFO L225 Difference]: With dead ends: 663 [2021-12-22 16:30:56,877 INFO L226 Difference]: Without dead ends: 663 [2021-12-22 16:30:56,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:30:56,878 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 333 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:56,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 438 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-12-22 16:30:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 548. [2021-12-22 16:30:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 479 states have (on average 1.4029227557411275) internal successors, (672), 523 states have internal predecessors, (672), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 16:30:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 708 transitions. [2021-12-22 16:30:56,885 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 708 transitions. Word has length 33 [2021-12-22 16:30:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:56,885 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 708 transitions. [2021-12-22 16:30:56,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 708 transitions. [2021-12-22 16:30:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 16:30:56,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:56,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:56,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-22 16:30:56,886 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:56,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:56,888 INFO L85 PathProgramCache]: Analyzing trace with hash 399419021, now seen corresponding path program 1 times [2021-12-22 16:30:56,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:56,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967888007] [2021-12-22 16:30:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:56,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:56,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:56,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:56,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967888007] [2021-12-22 16:30:56,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967888007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:56,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:56,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:30:56,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621124848] [2021-12-22 16:30:56,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:56,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:30:56,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:30:56,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:56,927 INFO L87 Difference]: Start difference. First operand 548 states and 708 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:57,094 INFO L93 Difference]: Finished difference Result 951 states and 1194 transitions. [2021-12-22 16:30:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:30:57,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-22 16:30:57,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:57,097 INFO L225 Difference]: With dead ends: 951 [2021-12-22 16:30:57,097 INFO L226 Difference]: Without dead ends: 951 [2021-12-22 16:30:57,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:57,098 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 473 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:57,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 582 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-12-22 16:30:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 545. [2021-12-22 16:30:57,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 479 states have (on average 1.3903966597077244) internal successors, (666), 520 states have internal predecessors, (666), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 16:30:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 702 transitions. [2021-12-22 16:30:57,106 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 702 transitions. Word has length 35 [2021-12-22 16:30:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:57,106 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 702 transitions. [2021-12-22 16:30:57,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 702 transitions. [2021-12-22 16:30:57,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 16:30:57,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:57,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:57,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-22 16:30:57,107 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:57,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash 399419022, now seen corresponding path program 1 times [2021-12-22 16:30:57,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:57,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103416126] [2021-12-22 16:30:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:57,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:57,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:57,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:57,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103416126] [2021-12-22 16:30:57,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103416126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:57,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:57,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:30:57,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661767408] [2021-12-22 16:30:57,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:57,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:30:57,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:30:57,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:30:57,180 INFO L87 Difference]: Start difference. First operand 545 states and 702 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:57,334 INFO L93 Difference]: Finished difference Result 855 states and 1077 transitions. [2021-12-22 16:30:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:30:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-22 16:30:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:57,336 INFO L225 Difference]: With dead ends: 855 [2021-12-22 16:30:57,336 INFO L226 Difference]: Without dead ends: 855 [2021-12-22 16:30:57,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:30:57,336 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 715 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:57,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 607 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-12-22 16:30:57,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 544. [2021-12-22 16:30:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 479 states have (on average 1.3862212943632568) internal successors, (664), 519 states have internal predecessors, (664), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 16:30:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 700 transitions. [2021-12-22 16:30:57,345 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 700 transitions. Word has length 35 [2021-12-22 16:30:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:57,345 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 700 transitions. [2021-12-22 16:30:57,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 700 transitions. [2021-12-22 16:30:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 16:30:57,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:57,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:57,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-22 16:30:57,346 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:57,346 INFO L85 PathProgramCache]: Analyzing trace with hash 399419183, now seen corresponding path program 1 times [2021-12-22 16:30:57,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:57,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007469267] [2021-12-22 16:30:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:57,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:57,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:57,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:57,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007469267] [2021-12-22 16:30:57,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007469267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:57,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:57,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:30:57,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259578558] [2021-12-22 16:30:57,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:57,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:30:57,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:30:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:30:57,414 INFO L87 Difference]: Start difference. First operand 544 states and 700 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:57,494 INFO L93 Difference]: Finished difference Result 662 states and 842 transitions. [2021-12-22 16:30:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:30:57,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-22 16:30:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:57,503 INFO L225 Difference]: With dead ends: 662 [2021-12-22 16:30:57,504 INFO L226 Difference]: Without dead ends: 662 [2021-12-22 16:30:57,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:30:57,504 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 298 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:57,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 259 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:57,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-22 16:30:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 542. [2021-12-22 16:30:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 479 states have (on average 1.3778705636743216) internal successors, (660), 517 states have internal predecessors, (660), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-22 16:30:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 696 transitions. [2021-12-22 16:30:57,512 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 696 transitions. Word has length 35 [2021-12-22 16:30:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:57,512 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 696 transitions. [2021-12-22 16:30:57,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 696 transitions. [2021-12-22 16:30:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 16:30:57,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:57,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:57,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-22 16:30:57,513 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:57,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1620073746, now seen corresponding path program 1 times [2021-12-22 16:30:57,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:57,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262782628] [2021-12-22 16:30:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:57,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:57,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:57,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 16:30:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:30:57,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:57,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262782628] [2021-12-22 16:30:57,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262782628] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:30:57,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351110669] [2021-12-22 16:30:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:57,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:57,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:57,600 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) [2021-12-22 16:30:57,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:30:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:57,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 16:30:57,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:30:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:57,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:30:57,938 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 16:30:57,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-22 16:30:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:30:57,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351110669] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:30:57,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:30:57,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-22 16:30:57,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421717871] [2021-12-22 16:30:57,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:30:57,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 16:30:57,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 16:30:57,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:30:57,981 INFO L87 Difference]: Start difference. First operand 542 states and 696 transitions. Second operand has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:30:58,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:58,452 INFO L93 Difference]: Finished difference Result 1745 states and 2122 transitions. [2021-12-22 16:30:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 16:30:58,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2021-12-22 16:30:58,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:58,455 INFO L225 Difference]: With dead ends: 1745 [2021-12-22 16:30:58,455 INFO L226 Difference]: Without dead ends: 1745 [2021-12-22 16:30:58,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-12-22 16:30:58,455 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 2957 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2959 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:58,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2959 Valid, 914 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:30:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2021-12-22 16:30:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 664. [2021-12-22 16:30:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 599 states have (on average 1.332220367278798) internal successors, (798), 631 states have internal predecessors, (798), 16 states have call successors, (16), 8 states have call predecessors, (16), 16 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-22 16:30:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 846 transitions. [2021-12-22 16:30:58,467 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 846 transitions. Word has length 43 [2021-12-22 16:30:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:58,467 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 846 transitions. [2021-12-22 16:30:58,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:30:58,468 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 846 transitions. [2021-12-22 16:30:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 16:30:58,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:58,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:58,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:30:58,686 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,SelfDestructingSolverStorable42 [2021-12-22 16:30:58,687 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:58,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1803853866, now seen corresponding path program 1 times [2021-12-22 16:30:58,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:58,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800397161] [2021-12-22 16:30:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:58,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:58,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 16:30:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:58,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:58,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800397161] [2021-12-22 16:30:58,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800397161] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:30:58,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923953611] [2021-12-22 16:30:58,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:58,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:58,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:58,764 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) [2021-12-22 16:30:58,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:30:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:58,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-22 16:30:58,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:30:58,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:30:58,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-22 16:30:58,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:30:58,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-22 16:30:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:30:59,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:30:59,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923953611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:59,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:30:59,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-22 16:30:59,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868539659] [2021-12-22 16:30:59,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:59,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:30:59,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:59,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:30:59,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:30:59,051 INFO L87 Difference]: Start difference. First operand 664 states and 846 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:59,274 INFO L93 Difference]: Finished difference Result 634 states and 793 transitions. [2021-12-22 16:30:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:30:59,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-22 16:30:59,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:59,276 INFO L225 Difference]: With dead ends: 634 [2021-12-22 16:30:59,276 INFO L226 Difference]: Without dead ends: 634 [2021-12-22 16:30:59,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:30:59,276 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 280 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:59,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 1358 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:59,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-22 16:30:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2021-12-22 16:30:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 427 states have (on average 1.3536299765807962) internal successors, (578), 456 states have internal predecessors, (578), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:30:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 602 transitions. [2021-12-22 16:30:59,283 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 602 transitions. Word has length 45 [2021-12-22 16:30:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:59,284 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 602 transitions. [2021-12-22 16:30:59,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:30:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 602 transitions. [2021-12-22 16:30:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 16:30:59,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:59,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:59,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:30:59,495 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,SelfDestructingSolverStorable43 [2021-12-22 16:30:59,496 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:30:59,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:59,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1377360706, now seen corresponding path program 1 times [2021-12-22 16:30:59,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:59,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049999180] [2021-12-22 16:30:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:59,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:59,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:30:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:59,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:59,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049999180] [2021-12-22 16:30:59,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049999180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:59,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:59,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 16:30:59,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643282938] [2021-12-22 16:30:59,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:59,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:30:59,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:30:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:30:59,957 INFO L87 Difference]: Start difference. First operand 476 states and 602 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:00,408 INFO L93 Difference]: Finished difference Result 674 states and 844 transitions. [2021-12-22 16:31:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:31:00,408 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-12-22 16:31:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:00,409 INFO L225 Difference]: With dead ends: 674 [2021-12-22 16:31:00,409 INFO L226 Difference]: Without dead ends: 674 [2021-12-22 16:31:00,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:31:00,410 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 231 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:00,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1200 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:31:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-22 16:31:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 498. [2021-12-22 16:31:00,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 449 states have (on average 1.3385300668151447) internal successors, (601), 478 states have internal predecessors, (601), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-22 16:31:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 625 transitions. [2021-12-22 16:31:00,415 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 625 transitions. Word has length 49 [2021-12-22 16:31:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:00,415 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 625 transitions. [2021-12-22 16:31:00,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 625 transitions. [2021-12-22 16:31:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 16:31:00,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:00,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:00,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-22 16:31:00,416 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash 399799259, now seen corresponding path program 1 times [2021-12-22 16:31:00,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:00,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427149714] [2021-12-22 16:31:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:00,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:00,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:00,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:00,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427149714] [2021-12-22 16:31:00,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427149714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:00,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:00,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 16:31:00,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574233767] [2021-12-22 16:31:00,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:00,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:31:00,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:00,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:31:00,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:31:00,578 INFO L87 Difference]: Start difference. First operand 498 states and 625 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:00,961 INFO L93 Difference]: Finished difference Result 962 states and 1198 transitions. [2021-12-22 16:31:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 16:31:00,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-22 16:31:00,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:00,963 INFO L225 Difference]: With dead ends: 962 [2021-12-22 16:31:00,963 INFO L226 Difference]: Without dead ends: 962 [2021-12-22 16:31:00,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-12-22 16:31:00,964 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 840 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:00,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 940 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:31:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-12-22 16:31:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 608. [2021-12-22 16:31:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 548 states have (on average 1.332116788321168) internal successors, (730), 579 states have internal predecessors, (730), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-22 16:31:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 772 transitions. [2021-12-22 16:31:00,989 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 772 transitions. Word has length 50 [2021-12-22 16:31:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:00,989 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 772 transitions. [2021-12-22 16:31:00,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 772 transitions. [2021-12-22 16:31:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 16:31:00,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:00,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:00,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-22 16:31:00,990 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:00,991 INFO L85 PathProgramCache]: Analyzing trace with hash 399799260, now seen corresponding path program 1 times [2021-12-22 16:31:00,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:00,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294039316] [2021-12-22 16:31:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:00,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:01,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:01,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:01,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294039316] [2021-12-22 16:31:01,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294039316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:01,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:01,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 16:31:01,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270666827] [2021-12-22 16:31:01,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:01,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:31:01,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:01,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:31:01,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:31:01,263 INFO L87 Difference]: Start difference. First operand 608 states and 772 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:01,662 INFO L93 Difference]: Finished difference Result 928 states and 1162 transitions. [2021-12-22 16:31:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:31:01,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-22 16:31:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:01,663 INFO L225 Difference]: With dead ends: 928 [2021-12-22 16:31:01,664 INFO L226 Difference]: Without dead ends: 928 [2021-12-22 16:31:01,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:31:01,664 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 775 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:01,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 737 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:31:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-12-22 16:31:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 707. [2021-12-22 16:31:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 639 states have (on average 1.3364632237871674) internal successors, (854), 672 states have internal predecessors, (854), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-22 16:31:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 908 transitions. [2021-12-22 16:31:01,677 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 908 transitions. Word has length 50 [2021-12-22 16:31:01,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:01,678 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 908 transitions. [2021-12-22 16:31:01,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:01,678 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 908 transitions. [2021-12-22 16:31:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 16:31:01,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:01,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:01,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-22 16:31:01,679 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash 397952217, now seen corresponding path program 1 times [2021-12-22 16:31:01,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:01,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966050291] [2021-12-22 16:31:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:01,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:01,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:01,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:01,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966050291] [2021-12-22 16:31:01,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966050291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:01,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180216163] [2021-12-22 16:31:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:01,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:01,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:01,907 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) [2021-12-22 16:31:01,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:31:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:02,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-22 16:31:02,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:02,060 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:31:02,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:31:02,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:02,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:02,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-22 16:31:02,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-22 16:31:02,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 16:31:02,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 16:31:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:02,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:31:02,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180216163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:02,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:31:02,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 22 [2021-12-22 16:31:02,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829725100] [2021-12-22 16:31:02,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:02,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:31:02,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:31:02,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:31:02,425 INFO L87 Difference]: Start difference. First operand 707 states and 908 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:03,008 INFO L93 Difference]: Finished difference Result 1592 states and 2006 transitions. [2021-12-22 16:31:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:31:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-22 16:31:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:03,011 INFO L225 Difference]: With dead ends: 1592 [2021-12-22 16:31:03,012 INFO L226 Difference]: Without dead ends: 1592 [2021-12-22 16:31:03,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-12-22 16:31:03,013 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 850 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:03,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 1255 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:31:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-12-22 16:31:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 737. [2021-12-22 16:31:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 669 states have (on average 1.3288490284005978) internal successors, (889), 702 states have internal predecessors, (889), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-22 16:31:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 943 transitions. [2021-12-22 16:31:03,026 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 943 transitions. Word has length 50 [2021-12-22 16:31:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:03,026 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 943 transitions. [2021-12-22 16:31:03,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:03,026 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 943 transitions. [2021-12-22 16:31:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 16:31:03,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:03,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:03,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:31:03,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:03,244 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:03,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:03,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1779782164, now seen corresponding path program 1 times [2021-12-22 16:31:03,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:03,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159354813] [2021-12-22 16:31:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:03,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:03,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:03,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:03,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159354813] [2021-12-22 16:31:03,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159354813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:03,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:03,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 16:31:03,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937987730] [2021-12-22 16:31:03,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:03,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 16:31:03,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:03,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 16:31:03,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:31:03,588 INFO L87 Difference]: Start difference. First operand 737 states and 943 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:04,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:04,495 INFO L93 Difference]: Finished difference Result 1847 states and 2361 transitions. [2021-12-22 16:31:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 16:31:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-22 16:31:04,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:04,498 INFO L225 Difference]: With dead ends: 1847 [2021-12-22 16:31:04,498 INFO L226 Difference]: Without dead ends: 1847 [2021-12-22 16:31:04,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-12-22 16:31:04,499 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 932 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:04,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 2193 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 16:31:04,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-12-22 16:31:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 940. [2021-12-22 16:31:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 860 states have (on average 1.3325581395348838) internal successors, (1146), 896 states have internal predecessors, (1146), 24 states have call successors, (24), 12 states have call predecessors, (24), 24 states have return successors, (48), 31 states have call predecessors, (48), 24 states have call successors, (48) [2021-12-22 16:31:04,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1218 transitions. [2021-12-22 16:31:04,526 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1218 transitions. Word has length 50 [2021-12-22 16:31:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:04,527 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 1218 transitions. [2021-12-22 16:31:04,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1218 transitions. [2021-12-22 16:31:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 16:31:04,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:04,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:04,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-22 16:31:04,529 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:04,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1779782165, now seen corresponding path program 1 times [2021-12-22 16:31:04,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:04,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440708906] [2021-12-22 16:31:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:04,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:04,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:04,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:04,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440708906] [2021-12-22 16:31:04,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440708906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:04,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:04,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 16:31:04,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803490287] [2021-12-22 16:31:04,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:04,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 16:31:04,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:04,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 16:31:04,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:31:04,781 INFO L87 Difference]: Start difference. First operand 940 states and 1218 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:05,511 INFO L93 Difference]: Finished difference Result 1869 states and 2407 transitions. [2021-12-22 16:31:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 16:31:05,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-22 16:31:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:05,514 INFO L225 Difference]: With dead ends: 1869 [2021-12-22 16:31:05,514 INFO L226 Difference]: Without dead ends: 1869 [2021-12-22 16:31:05,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:31:05,515 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 596 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:05,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 2296 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 16:31:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-12-22 16:31:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 829. [2021-12-22 16:31:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 761 states have (on average 1.3350854139290407) internal successors, (1016), 794 states have internal predecessors, (1016), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-22 16:31:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1070 transitions. [2021-12-22 16:31:05,528 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1070 transitions. Word has length 50 [2021-12-22 16:31:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:05,528 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1070 transitions. [2021-12-22 16:31:05,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1070 transitions. [2021-12-22 16:31:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 16:31:05,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:05,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:05,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-22 16:31:05,529 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:05,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1777935122, now seen corresponding path program 1 times [2021-12-22 16:31:05,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:05,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103532709] [2021-12-22 16:31:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:05,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:05,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:05,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:05,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103532709] [2021-12-22 16:31:05,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103532709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:05,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:05,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 16:31:05,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228680476] [2021-12-22 16:31:05,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:05,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 16:31:05,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:05,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 16:31:05,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:31:05,817 INFO L87 Difference]: Start difference. First operand 829 states and 1070 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:06,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:06,475 INFO L93 Difference]: Finished difference Result 1629 states and 2052 transitions. [2021-12-22 16:31:06,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:31:06,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-22 16:31:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:06,478 INFO L225 Difference]: With dead ends: 1629 [2021-12-22 16:31:06,478 INFO L226 Difference]: Without dead ends: 1629 [2021-12-22 16:31:06,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-12-22 16:31:06,479 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 668 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:06,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 1796 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 16:31:06,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-12-22 16:31:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 834. [2021-12-22 16:31:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 766 states have (on average 1.3328981723237598) internal successors, (1021), 799 states have internal predecessors, (1021), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-22 16:31:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1075 transitions. [2021-12-22 16:31:06,505 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1075 transitions. Word has length 50 [2021-12-22 16:31:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:06,505 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1075 transitions. [2021-12-22 16:31:06,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1075 transitions. [2021-12-22 16:31:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 16:31:06,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:06,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:06,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-22 16:31:06,507 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1311732840, now seen corresponding path program 1 times [2021-12-22 16:31:06,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:06,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310385602] [2021-12-22 16:31:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:06,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:06,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:06,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:06,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310385602] [2021-12-22 16:31:06,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310385602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:06,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167380837] [2021-12-22 16:31:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:06,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:06,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:06,846 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) [2021-12-22 16:31:06,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:31:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:06,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-22 16:31:06,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:06,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:31:07,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:07,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:07,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-22 16:31:07,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-22 16:31:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:07,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:31:07,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167380837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:07,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:31:07,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 22 [2021-12-22 16:31:07,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440132179] [2021-12-22 16:31:07,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:07,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:31:07,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:07,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:31:07,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-22 16:31:07,489 INFO L87 Difference]: Start difference. First operand 834 states and 1075 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:07,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:07,961 INFO L93 Difference]: Finished difference Result 1525 states and 1952 transitions. [2021-12-22 16:31:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 16:31:07,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-22 16:31:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:07,964 INFO L225 Difference]: With dead ends: 1525 [2021-12-22 16:31:07,964 INFO L226 Difference]: Without dead ends: 1525 [2021-12-22 16:31:07,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 16:31:07,964 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 837 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:07,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 933 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:31:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-12-22 16:31:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1066. [2021-12-22 16:31:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 974 states have (on average 1.3285420944558521) internal successors, (1294), 1013 states have internal predecessors, (1294), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 37 states have call predecessors, (60), 30 states have call successors, (60) [2021-12-22 16:31:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1384 transitions. [2021-12-22 16:31:07,976 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1384 transitions. Word has length 51 [2021-12-22 16:31:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:07,976 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1384 transitions. [2021-12-22 16:31:07,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1384 transitions. [2021-12-22 16:31:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 16:31:07,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:07,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:07,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:31:08,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:08,191 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1311732841, now seen corresponding path program 1 times [2021-12-22 16:31:08,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:08,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265843136] [2021-12-22 16:31:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:08,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:08,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:08,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:08,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265843136] [2021-12-22 16:31:08,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265843136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:08,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:08,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 16:31:08,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755819487] [2021-12-22 16:31:08,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:08,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:31:08,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:31:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:31:08,623 INFO L87 Difference]: Start difference. First operand 1066 states and 1384 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:09,679 INFO L93 Difference]: Finished difference Result 2540 states and 3330 transitions. [2021-12-22 16:31:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 16:31:09,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-22 16:31:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:09,683 INFO L225 Difference]: With dead ends: 2540 [2021-12-22 16:31:09,683 INFO L226 Difference]: Without dead ends: 2540 [2021-12-22 16:31:09,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 16:31:09,684 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1741 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:09,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1743 Valid, 1322 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:31:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-12-22 16:31:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1245. [2021-12-22 16:31:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1137 states have (on average 1.3333333333333333) internal successors, (1516), 1180 states have internal predecessors, (1516), 38 states have call successors, (38), 19 states have call predecessors, (38), 38 states have return successors, (76), 45 states have call predecessors, (76), 38 states have call successors, (76) [2021-12-22 16:31:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1630 transitions. [2021-12-22 16:31:09,708 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1630 transitions. Word has length 51 [2021-12-22 16:31:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:09,709 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 1630 transitions. [2021-12-22 16:31:09,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1630 transitions. [2021-12-22 16:31:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 16:31:09,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:09,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:09,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-22 16:31:09,710 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash 2066269430, now seen corresponding path program 1 times [2021-12-22 16:31:09,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:09,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936238077] [2021-12-22 16:31:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:09,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:09,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:09,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:09,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936238077] [2021-12-22 16:31:09,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936238077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:09,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:09,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 16:31:09,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671490412] [2021-12-22 16:31:09,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:09,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:31:09,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:09,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:31:09,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:31:09,867 INFO L87 Difference]: Start difference. First operand 1245 states and 1630 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:10,103 INFO L93 Difference]: Finished difference Result 1943 states and 2525 transitions. [2021-12-22 16:31:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:31:10,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-22 16:31:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:10,106 INFO L225 Difference]: With dead ends: 1943 [2021-12-22 16:31:10,106 INFO L226 Difference]: Without dead ends: 1943 [2021-12-22 16:31:10,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:31:10,107 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 769 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:10,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 858 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:31:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-12-22 16:31:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1649. [2021-12-22 16:31:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1501 states have (on average 1.3324450366422385) internal successors, (2000), 1554 states have internal predecessors, (2000), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 65 states have call predecessors, (116), 58 states have call successors, (116) [2021-12-22 16:31:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2174 transitions. [2021-12-22 16:31:10,125 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2174 transitions. Word has length 52 [2021-12-22 16:31:10,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:10,125 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2174 transitions. [2021-12-22 16:31:10,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2174 transitions. [2021-12-22 16:31:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 16:31:10,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:10,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:10,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-22 16:31:10,126 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:10,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2009011128, now seen corresponding path program 1 times [2021-12-22 16:31:10,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:10,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533205784] [2021-12-22 16:31:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:10,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:10,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:10,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:10,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533205784] [2021-12-22 16:31:10,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533205784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:10,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:10,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 16:31:10,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698932816] [2021-12-22 16:31:10,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:10,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:31:10,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:31:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:31:10,424 INFO L87 Difference]: Start difference. First operand 1649 states and 2174 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:11,403 INFO L93 Difference]: Finished difference Result 2946 states and 3872 transitions. [2021-12-22 16:31:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 16:31:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-22 16:31:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:11,408 INFO L225 Difference]: With dead ends: 2946 [2021-12-22 16:31:11,408 INFO L226 Difference]: Without dead ends: 2946 [2021-12-22 16:31:11,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 16:31:11,409 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 1457 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:11,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 1629 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:31:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-12-22 16:31:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 1649. [2021-12-22 16:31:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1501 states have (on average 1.3324450366422385) internal successors, (2000), 1554 states have internal predecessors, (2000), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 65 states have call predecessors, (116), 58 states have call successors, (116) [2021-12-22 16:31:11,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2174 transitions. [2021-12-22 16:31:11,428 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2174 transitions. Word has length 52 [2021-12-22 16:31:11,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:11,428 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2174 transitions. [2021-12-22 16:31:11,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:11,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2174 transitions. [2021-12-22 16:31:11,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 16:31:11,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:11,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:11,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-22 16:31:11,430 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash 842252799, now seen corresponding path program 1 times [2021-12-22 16:31:11,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:11,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810791762] [2021-12-22 16:31:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:11,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:11,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:11,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:11,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810791762] [2021-12-22 16:31:11,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810791762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:11,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:11,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 16:31:11,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242761250] [2021-12-22 16:31:11,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:11,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:31:11,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:11,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:31:11,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:31:11,565 INFO L87 Difference]: Start difference. First operand 1649 states and 2174 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:11,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:11,829 INFO L93 Difference]: Finished difference Result 2035 states and 2650 transitions. [2021-12-22 16:31:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:31:11,830 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-22 16:31:11,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:11,833 INFO L225 Difference]: With dead ends: 2035 [2021-12-22 16:31:11,833 INFO L226 Difference]: Without dead ends: 2035 [2021-12-22 16:31:11,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:31:11,833 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 397 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:11,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1157 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:31:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-12-22 16:31:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1341. [2021-12-22 16:31:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1225 states have (on average 1.3338775510204082) internal successors, (1634), 1270 states have internal predecessors, (1634), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 49 states have call predecessors, (84), 42 states have call successors, (84) [2021-12-22 16:31:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1760 transitions. [2021-12-22 16:31:11,847 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1760 transitions. Word has length 52 [2021-12-22 16:31:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:11,848 INFO L470 AbstractCegarLoop]: Abstraction has 1341 states and 1760 transitions. [2021-12-22 16:31:11,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:11,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1760 transitions. [2021-12-22 16:31:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 16:31:11,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:11,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:11,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-22 16:31:11,849 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:11,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:11,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1411489050, now seen corresponding path program 1 times [2021-12-22 16:31:11,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:11,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806953557] [2021-12-22 16:31:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:11,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:12,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:12,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:12,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806953557] [2021-12-22 16:31:12,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806953557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:12,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:12,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 16:31:12,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238340070] [2021-12-22 16:31:12,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:12,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 16:31:12,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:12,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 16:31:12,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:31:12,076 INFO L87 Difference]: Start difference. First operand 1341 states and 1760 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:12,584 INFO L93 Difference]: Finished difference Result 2139 states and 2791 transitions. [2021-12-22 16:31:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 16:31:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-22 16:31:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:12,587 INFO L225 Difference]: With dead ends: 2139 [2021-12-22 16:31:12,588 INFO L226 Difference]: Without dead ends: 2139 [2021-12-22 16:31:12,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-12-22 16:31:12,588 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 851 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:12,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 810 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:31:12,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-12-22 16:31:12,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1849. [2021-12-22 16:31:12,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1685 states have (on average 1.3359050445103857) internal successors, (2251), 1742 states have internal predecessors, (2251), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2021-12-22 16:31:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2449 transitions. [2021-12-22 16:31:12,606 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2449 transitions. Word has length 54 [2021-12-22 16:31:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:12,607 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2449 transitions. [2021-12-22 16:31:12,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2449 transitions. [2021-12-22 16:31:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 16:31:12,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:12,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:12,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-22 16:31:12,608 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:12,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2074131620, now seen corresponding path program 1 times [2021-12-22 16:31:12,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:12,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316534980] [2021-12-22 16:31:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:12,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:12,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:12,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316534980] [2021-12-22 16:31:12,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316534980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:12,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:12,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 16:31:12,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852600106] [2021-12-22 16:31:12,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:12,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:31:12,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:31:12,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:31:12,922 INFO L87 Difference]: Start difference. First operand 1849 states and 2449 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:14,131 INFO L93 Difference]: Finished difference Result 3328 states and 4408 transitions. [2021-12-22 16:31:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-22 16:31:14,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-22 16:31:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:14,135 INFO L225 Difference]: With dead ends: 3328 [2021-12-22 16:31:14,135 INFO L226 Difference]: Without dead ends: 3328 [2021-12-22 16:31:14,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=379, Invalid=1343, Unknown=0, NotChecked=0, Total=1722 [2021-12-22 16:31:14,136 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 1568 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:14,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 1561 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:31:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-12-22 16:31:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 1849. [2021-12-22 16:31:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1685 states have (on average 1.3359050445103857) internal successors, (2251), 1742 states have internal predecessors, (2251), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2021-12-22 16:31:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2449 transitions. [2021-12-22 16:31:14,159 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2449 transitions. Word has length 54 [2021-12-22 16:31:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:14,159 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2449 transitions. [2021-12-22 16:31:14,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2449 transitions. [2021-12-22 16:31:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 16:31:14,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:14,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:14,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-22 16:31:14,161 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1952545763, now seen corresponding path program 1 times [2021-12-22 16:31:14,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:14,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527898852] [2021-12-22 16:31:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:14,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:14,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:14,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:14,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527898852] [2021-12-22 16:31:14,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527898852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:14,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:14,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 16:31:14,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051272097] [2021-12-22 16:31:14,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:14,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 16:31:14,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:14,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 16:31:14,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:31:14,396 INFO L87 Difference]: Start difference. First operand 1849 states and 2449 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:14,975 INFO L93 Difference]: Finished difference Result 2961 states and 3905 transitions. [2021-12-22 16:31:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 16:31:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-22 16:31:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:14,979 INFO L225 Difference]: With dead ends: 2961 [2021-12-22 16:31:14,979 INFO L226 Difference]: Without dead ends: 2961 [2021-12-22 16:31:14,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-12-22 16:31:14,980 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 784 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 2180 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:14,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 2180 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:31:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-12-22 16:31:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 1821. [2021-12-22 16:31:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1657 states have (on average 1.3349426674713338) internal successors, (2212), 1714 states have internal predecessors, (2212), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2021-12-22 16:31:15,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2410 transitions. [2021-12-22 16:31:15,004 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2410 transitions. Word has length 54 [2021-12-22 16:31:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:15,004 INFO L470 AbstractCegarLoop]: Abstraction has 1821 states and 2410 transitions. [2021-12-22 16:31:15,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:31:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2410 transitions. [2021-12-22 16:31:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 16:31:15,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:15,005 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:15,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-22 16:31:15,005 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:15,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:15,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1262088084, now seen corresponding path program 1 times [2021-12-22 16:31:15,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:15,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752826648] [2021-12-22 16:31:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:15,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:15,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:15,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 16:31:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:31:15,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:15,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752826648] [2021-12-22 16:31:15,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752826648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:15,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:15,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 16:31:15,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690696311] [2021-12-22 16:31:15,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:15,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:31:15,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:15,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:31:15,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:31:15,313 INFO L87 Difference]: Start difference. First operand 1821 states and 2410 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:31:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:16,207 INFO L93 Difference]: Finished difference Result 3722 states and 4937 transitions. [2021-12-22 16:31:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 16:31:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2021-12-22 16:31:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:16,214 INFO L225 Difference]: With dead ends: 3722 [2021-12-22 16:31:16,215 INFO L226 Difference]: Without dead ends: 3720 [2021-12-22 16:31:16,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=773, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 16:31:16,215 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 1623 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:16,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1623 Valid, 2415 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:31:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-12-22 16:31:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 1782. [2021-12-22 16:31:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1622 states have (on average 1.3298397040690506) internal successors, (2157), 1678 states have internal predecessors, (2157), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 71 states have call predecessors, (128), 64 states have call successors, (128) [2021-12-22 16:31:16,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2349 transitions. [2021-12-22 16:31:16,243 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2349 transitions. Word has length 56 [2021-12-22 16:31:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:16,244 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 2349 transitions. [2021-12-22 16:31:16,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:31:16,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2349 transitions. [2021-12-22 16:31:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 16:31:16,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:16,244 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 16:31:16,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-22 16:31:16,245 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:16,245 INFO L85 PathProgramCache]: Analyzing trace with hash 829418521, now seen corresponding path program 1 times [2021-12-22 16:31:16,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:16,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693432935] [2021-12-22 16:31:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:16,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:16,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:16,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 16:31:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:31:16,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:16,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693432935] [2021-12-22 16:31:16,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693432935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:16,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530616487] [2021-12-22 16:31:16,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:16,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:16,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:16,610 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) [2021-12-22 16:31:16,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:31:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:16,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-22 16:31:16,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:16,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:31:17,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:17,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:17,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-22 16:31:17,173 INFO L353 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2021-12-22 16:31:17,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2021-12-22 16:31:17,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-22 16:31:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:17,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:31:17,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530616487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:17,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:31:17,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2021-12-22 16:31:17,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974052877] [2021-12-22 16:31:17,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:31:17,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 16:31:17,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:17,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 16:31:17,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-12-22 16:31:17,329 INFO L87 Difference]: Start difference. First operand 1782 states and 2349 transitions. Second operand has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:18,418 INFO L93 Difference]: Finished difference Result 3018 states and 3950 transitions. [2021-12-22 16:31:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-22 16:31:18,419 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2021-12-22 16:31:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:18,423 INFO L225 Difference]: With dead ends: 3018 [2021-12-22 16:31:18,423 INFO L226 Difference]: Without dead ends: 3018 [2021-12-22 16:31:18,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=1953, Unknown=0, NotChecked=0, Total=2450 [2021-12-22 16:31:18,424 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 2022 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2023 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:18,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2023 Valid, 2100 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 16:31:18,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-12-22 16:31:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 1812. [2021-12-22 16:31:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1652 states have (on average 1.3286924939467313) internal successors, (2195), 1705 states have internal predecessors, (2195), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 74 states have call predecessors, (128), 64 states have call successors, (128) [2021-12-22 16:31:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2387 transitions. [2021-12-22 16:31:18,443 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2387 transitions. Word has length 56 [2021-12-22 16:31:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:18,443 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 2387 transitions. [2021-12-22 16:31:18,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2387 transitions. [2021-12-22 16:31:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 16:31:18,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:18,444 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 16:31:18,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:31:18,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:18,661 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash 829418522, now seen corresponding path program 1 times [2021-12-22 16:31:18,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:18,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839491789] [2021-12-22 16:31:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:18,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:19,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:19,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 16:31:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:31:19,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:19,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839491789] [2021-12-22 16:31:19,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839491789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:19,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523611942] [2021-12-22 16:31:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:19,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:19,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:19,321 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:31:19,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:31:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:19,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-22 16:31:19,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:19,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:31:19,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-22 16:31:19,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:20,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:20,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2021-12-22 16:31:20,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:20,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 46 [2021-12-22 16:31:20,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:20,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-22 16:31:20,247 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-22 16:31:20,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 16:31:20,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-22 16:31:20,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-12-22 16:31:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:20,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:31:20,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523611942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:20,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:31:20,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-12-22 16:31:20,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359940883] [2021-12-22 16:31:20,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:31:20,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-22 16:31:20,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:20,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-22 16:31:20,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 16:31:20,675 INFO L87 Difference]: Start difference. First operand 1812 states and 2387 transitions. Second operand has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:23,432 INFO L93 Difference]: Finished difference Result 3570 states and 4717 transitions. [2021-12-22 16:31:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-22 16:31:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2021-12-22 16:31:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:23,437 INFO L225 Difference]: With dead ends: 3570 [2021-12-22 16:31:23,437 INFO L226 Difference]: Without dead ends: 3570 [2021-12-22 16:31:23,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=666, Invalid=3116, Unknown=0, NotChecked=0, Total=3782 [2021-12-22 16:31:23,438 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 4213 mSDsluCounter, 2994 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4214 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:23,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4214 Valid, 3145 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 16:31:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2021-12-22 16:31:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 1812. [2021-12-22 16:31:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1652 states have (on average 1.3268765133171914) internal successors, (2192), 1705 states have internal predecessors, (2192), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 74 states have call predecessors, (128), 64 states have call successors, (128) [2021-12-22 16:31:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2384 transitions. [2021-12-22 16:31:23,458 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2384 transitions. Word has length 56 [2021-12-22 16:31:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:23,458 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 2384 transitions. [2021-12-22 16:31:23,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2384 transitions. [2021-12-22 16:31:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 16:31:23,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:23,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:23,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-22 16:31:23,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:23,676 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:23,676 INFO L85 PathProgramCache]: Analyzing trace with hash -997629707, now seen corresponding path program 1 times [2021-12-22 16:31:23,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:23,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841937707] [2021-12-22 16:31:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:23,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:24,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:24,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 16:31:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:31:24,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:24,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841937707] [2021-12-22 16:31:24,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841937707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:24,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061865902] [2021-12-22 16:31:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:24,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:24,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:24,216 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:31:24,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:31:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:24,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-22 16:31:24,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:24,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:24,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:24,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2021-12-22 16:31:25,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:25,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:25,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:25,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:31:25,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2021-12-22 16:31:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:25,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:31:25,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2021-12-22 16:31:25,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2021-12-22 16:31:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:31:26,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061865902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:31:26,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:31:26,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 16] total 45 [2021-12-22 16:31:26,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881091311] [2021-12-22 16:31:26,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:31:26,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-22 16:31:26,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-22 16:31:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2021-12-22 16:31:26,264 INFO L87 Difference]: Start difference. First operand 1812 states and 2384 transitions. Second operand has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 16:31:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:33,311 INFO L93 Difference]: Finished difference Result 7246 states and 9494 transitions. [2021-12-22 16:31:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-22 16:31:33,324 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 56 [2021-12-22 16:31:33,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:33,333 INFO L225 Difference]: With dead ends: 7246 [2021-12-22 16:31:33,333 INFO L226 Difference]: Without dead ends: 7244 [2021-12-22 16:31:33,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2201, Invalid=10231, Unknown=0, NotChecked=0, Total=12432 [2021-12-22 16:31:33,335 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 3919 mSDsluCounter, 18801 mSDsCounter, 0 mSdLazyCounter, 7928 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3919 SdHoareTripleChecker+Valid, 19558 SdHoareTripleChecker+Invalid, 8285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 7928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:33,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3919 Valid, 19558 Invalid, 8285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 7928 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-22 16:31:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7244 states. [2021-12-22 16:31:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7244 to 1771. [2021-12-22 16:31:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1615 states have (on average 1.3195046439628484) internal successors, (2131), 1667 states have internal predecessors, (2131), 62 states have call successors, (62), 31 states have call predecessors, (62), 62 states have return successors, (124), 72 states have call predecessors, (124), 62 states have call successors, (124) [2021-12-22 16:31:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2317 transitions. [2021-12-22 16:31:33,392 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2317 transitions. Word has length 56 [2021-12-22 16:31:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:33,392 INFO L470 AbstractCegarLoop]: Abstraction has 1771 states and 2317 transitions. [2021-12-22 16:31:33,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 16:31:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2317 transitions. [2021-12-22 16:31:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 16:31:33,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:33,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:33,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 16:31:33,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:33,625 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:33,626 INFO L85 PathProgramCache]: Analyzing trace with hash -773789015, now seen corresponding path program 1 times [2021-12-22 16:31:33,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:33,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381692114] [2021-12-22 16:31:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:33,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:33,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:33,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 16:31:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:31:33,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381692114] [2021-12-22 16:31:33,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381692114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233655637] [2021-12-22 16:31:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:33,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:33,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:33,785 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:31:33,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:31:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-22 16:31:33,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:33,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:31:34,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:34,438 INFO L353 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2021-12-22 16:31:34,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2021-12-22 16:31:34,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:31:34,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-22 16:31:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:34,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:31:34,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233655637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:34,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:31:34,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-22 16:31:34,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828295057] [2021-12-22 16:31:34,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:31:34,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 16:31:34,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:34,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 16:31:34,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:31:34,601 INFO L87 Difference]: Start difference. First operand 1771 states and 2317 transitions. Second operand has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:35,082 INFO L93 Difference]: Finished difference Result 3366 states and 4398 transitions. [2021-12-22 16:31:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 16:31:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-12-22 16:31:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:35,086 INFO L225 Difference]: With dead ends: 3366 [2021-12-22 16:31:35,086 INFO L226 Difference]: Without dead ends: 3366 [2021-12-22 16:31:35,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-12-22 16:31:35,088 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 939 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:35,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 2267 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 880 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2021-12-22 16:31:35,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2021-12-22 16:31:35,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3110. [2021-12-22 16:31:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 2842 states have (on average 1.322308233638283) internal successors, (3758), 2925 states have internal predecessors, (3758), 112 states have call successors, (112), 62 states have call predecessors, (112), 124 states have return successors, (224), 122 states have call predecessors, (224), 112 states have call successors, (224) [2021-12-22 16:31:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 4094 transitions. [2021-12-22 16:31:35,186 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 4094 transitions. Word has length 57 [2021-12-22 16:31:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:35,187 INFO L470 AbstractCegarLoop]: Abstraction has 3110 states and 4094 transitions. [2021-12-22 16:31:35,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 4094 transitions. [2021-12-22 16:31:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 16:31:35,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:35,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:35,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 16:31:35,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-22 16:31:35,404 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:35,404 INFO L85 PathProgramCache]: Analyzing trace with hash -773789014, now seen corresponding path program 1 times [2021-12-22 16:31:35,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:35,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748954542] [2021-12-22 16:31:35,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:35,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:35,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:35,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 16:31:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:31:35,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:35,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748954542] [2021-12-22 16:31:35,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748954542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:35,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449835655] [2021-12-22 16:31:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:35,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:35,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:35,640 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:31:35,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 16:31:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:35,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-22 16:31:35,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:35,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:31:36,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:36,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:36,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:36,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-22 16:31:36,618 INFO L353 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-12-22 16:31:36,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-22 16:31:36,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:31:36,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-22 16:31:36,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:31:36,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 16:31:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:36,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:31:37,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449835655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:37,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:31:37,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-12-22 16:31:37,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518553783] [2021-12-22 16:31:37,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:31:37,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 16:31:37,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 16:31:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-12-22 16:31:37,029 INFO L87 Difference]: Start difference. First operand 3110 states and 4094 transitions. Second operand has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:39,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:39,165 INFO L93 Difference]: Finished difference Result 5227 states and 6881 transitions. [2021-12-22 16:31:39,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 16:31:39,165 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-12-22 16:31:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:39,171 INFO L225 Difference]: With dead ends: 5227 [2021-12-22 16:31:39,171 INFO L226 Difference]: Without dead ends: 5227 [2021-12-22 16:31:39,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2021-12-22 16:31:39,172 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 1590 mSDsluCounter, 3548 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1590 SdHoareTripleChecker+Valid, 3787 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 718 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:39,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1590 Valid, 3787 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1650 Invalid, 0 Unknown, 718 Unchecked, 0.8s Time] [2021-12-22 16:31:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2021-12-22 16:31:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 4407. [2021-12-22 16:31:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4045 states have (on average 1.323114956736712) internal successors, (5352), 4147 states have internal predecessors, (5352), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 172 states have call predecessors, (312), 156 states have call successors, (312) [2021-12-22 16:31:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 5820 transitions. [2021-12-22 16:31:39,214 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 5820 transitions. Word has length 57 [2021-12-22 16:31:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:39,214 INFO L470 AbstractCegarLoop]: Abstraction has 4407 states and 5820 transitions. [2021-12-22 16:31:39,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 5820 transitions. [2021-12-22 16:31:39,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 16:31:39,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:39,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:39,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-22 16:31:39,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:39,432 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1165513920, now seen corresponding path program 1 times [2021-12-22 16:31:39,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:39,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497821979] [2021-12-22 16:31:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:39,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:39,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:39,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 16:31:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:31:39,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:39,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497821979] [2021-12-22 16:31:39,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497821979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:39,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180093748] [2021-12-22 16:31:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:39,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:39,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:39,709 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:31:39,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:31:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-22 16:31:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:39,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:31:40,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:40,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-22 16:31:40,442 INFO L353 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-22 16:31:40,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-12-22 16:31:40,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-22 16:31:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:40,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:31:40,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180093748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:40,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:31:40,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2021-12-22 16:31:40,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903559061] [2021-12-22 16:31:40,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:31:40,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 16:31:40,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:40,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 16:31:40,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-12-22 16:31:40,541 INFO L87 Difference]: Start difference. First operand 4407 states and 5820 transitions. Second operand has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:41,537 INFO L93 Difference]: Finished difference Result 6237 states and 8242 transitions. [2021-12-22 16:31:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 16:31:41,538 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-12-22 16:31:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:41,569 INFO L225 Difference]: With dead ends: 6237 [2021-12-22 16:31:41,569 INFO L226 Difference]: Without dead ends: 6237 [2021-12-22 16:31:41,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=1114, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 16:31:41,572 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 1272 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:41,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 3512 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1835 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 16:31:41,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-12-22 16:31:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 4473. [2021-12-22 16:31:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4473 states, 4111 states have (on average 1.3218195086353686) internal successors, (5434), 4207 states have internal predecessors, (5434), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 178 states have call predecessors, (312), 156 states have call successors, (312) [2021-12-22 16:31:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4473 states to 4473 states and 5902 transitions. [2021-12-22 16:31:41,694 INFO L78 Accepts]: Start accepts. Automaton has 4473 states and 5902 transitions. Word has length 57 [2021-12-22 16:31:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:41,694 INFO L470 AbstractCegarLoop]: Abstraction has 4473 states and 5902 transitions. [2021-12-22 16:31:41,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 4473 states and 5902 transitions. [2021-12-22 16:31:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 16:31:41,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:41,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:41,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:31:41,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-22 16:31:41,896 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1165513919, now seen corresponding path program 1 times [2021-12-22 16:31:41,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:41,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944552698] [2021-12-22 16:31:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:41,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:42,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:42,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 16:31:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:31:42,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:42,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944552698] [2021-12-22 16:31:42,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944552698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:42,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012106145] [2021-12-22 16:31:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:42,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:42,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:42,363 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:31:42,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 16:31:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-22 16:31:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:42,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:31:42,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:31:42,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:42,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:31:43,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:43,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-12-22 16:31:43,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:43,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-22 16:31:43,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:43,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 16:31:43,254 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-22 16:31:43,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 16:31:43,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-22 16:31:43,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 16:31:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:43,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:31:43,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012106145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:43,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:31:43,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2021-12-22 16:31:43,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793864645] [2021-12-22 16:31:43,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:31:43,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 16:31:43,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:43,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 16:31:43,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-12-22 16:31:43,557 INFO L87 Difference]: Start difference. First operand 4473 states and 5902 transitions. Second operand has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:45,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:45,758 INFO L93 Difference]: Finished difference Result 7486 states and 9907 transitions. [2021-12-22 16:31:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 16:31:45,771 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-12-22 16:31:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:45,783 INFO L225 Difference]: With dead ends: 7486 [2021-12-22 16:31:45,783 INFO L226 Difference]: Without dead ends: 7486 [2021-12-22 16:31:45,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=528, Invalid=2228, Unknown=0, NotChecked=0, Total=2756 [2021-12-22 16:31:45,786 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 2381 mSDsluCounter, 3185 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2381 SdHoareTripleChecker+Valid, 3478 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:45,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2381 Valid, 3478 Invalid, 2448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 16:31:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7486 states. [2021-12-22 16:31:45,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 4566. [2021-12-22 16:31:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4566 states, 4204 states have (on average 1.318744053282588) internal successors, (5544), 4291 states have internal predecessors, (5544), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 187 states have call predecessors, (312), 156 states have call successors, (312) [2021-12-22 16:31:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 6012 transitions. [2021-12-22 16:31:45,850 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 6012 transitions. Word has length 57 [2021-12-22 16:31:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:45,850 INFO L470 AbstractCegarLoop]: Abstraction has 4566 states and 6012 transitions. [2021-12-22 16:31:45,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:31:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 6012 transitions. [2021-12-22 16:31:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 16:31:45,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:45,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:31:45,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 16:31:46,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-22 16:31:46,067 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-22 16:31:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1940784111, now seen corresponding path program 1 times [2021-12-22 16:31:46,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:46,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323313509] [2021-12-22 16:31:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:46,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:46,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 16:31:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:46,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323313509] [2021-12-22 16:31:46,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323313509] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008292623] [2021-12-22 16:31:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:46,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:46,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:46,540 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:31:46,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 16:31:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:46,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-22 16:31:46,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:46,758 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:31:46,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:31:47,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:31:47,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:31:47,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:47,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 16:31:47,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:47,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 16:31:47,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:47,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 16:31:47,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:47,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 16:31:47,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 16:31:47,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-22 16:31:47,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:31:47,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:47,860 INFO L353 Elim1Store]: treesize reduction 31, result has 20.5 percent of original size [2021-12-22 16:31:47,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 45 [2021-12-22 16:31:47,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:31:47,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-22 16:31:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:47,904 INFO L328 TraceCheckSpWp]: Computing backward predicates...