./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:22:18,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:22:18,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:22:18,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:22:18,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:22:18,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:22:18,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:22:18,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:22:18,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:22:18,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:22:18,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:22:18,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:22:18,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:22:18,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:22:18,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:22:18,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:22:18,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:22:18,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:22:18,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:22:18,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:22:18,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:22:18,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:22:18,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:22:18,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:22:18,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:22:18,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:22:18,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:22:18,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:22:18,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:22:18,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:22:18,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:22:18,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:22:18,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:22:18,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:22:18,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:22:18,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:22:18,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:22:18,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:22:18,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:22:18,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:22:18,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:22:18,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:22:18,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:22:18,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:22:18,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:22:18,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:22:18,342 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:22:18,342 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:22:18,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:22:18,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:22:18,343 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:22:18,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:22:18,344 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:22:18,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:22:18,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:22:18,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:22:18,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:22:18,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:22:18,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:22:18,345 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:22:18,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:22:18,345 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:22:18,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:22:18,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:22:18,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:22:18,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:22:18,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:22:18,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:22:18,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:22:18,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:22:18,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:22:18,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:22:18,348 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:22:18,348 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:22:18,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:22:18,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:22:18,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2021-12-22 08:22:18,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:22:18,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:22:18,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:22:18,554 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:22:18,554 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:22:18,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2021-12-22 08:22:18,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9452b7f4f/39de9b46e0f642ee94b6abcf4a5621dd/FLAG29df61b08 [2021-12-22 08:22:18,950 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:22:18,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2021-12-22 08:22:18,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9452b7f4f/39de9b46e0f642ee94b6abcf4a5621dd/FLAG29df61b08 [2021-12-22 08:22:18,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9452b7f4f/39de9b46e0f642ee94b6abcf4a5621dd [2021-12-22 08:22:18,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:22:18,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:22:18,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:22:18,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:22:18,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:22:18,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:22:18" (1/1) ... [2021-12-22 08:22:18,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63eb7091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:18, skipping insertion in model container [2021-12-22 08:22:18,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:22:18" (1/1) ... [2021-12-22 08:22:18,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:22:18,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:22:19,089 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2021-12-22 08:22:19,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:22:19,106 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:22:19,116 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2021-12-22 08:22:19,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:22:19,128 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:22:19,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19 WrapperNode [2021-12-22 08:22:19,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:22:19,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:22:19,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:22:19,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:22:19,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19" (1/1) ... [2021-12-22 08:22:19,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19" (1/1) ... [2021-12-22 08:22:19,150 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2021-12-22 08:22:19,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:22:19,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:22:19,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:22:19,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:22:19,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19" (1/1) ... [2021-12-22 08:22:19,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19" (1/1) ... [2021-12-22 08:22:19,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19" (1/1) ... [2021-12-22 08:22:19,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19" (1/1) ... [2021-12-22 08:22:19,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19" (1/1) ... [2021-12-22 08:22:19,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19" (1/1) ... [2021-12-22 08:22:19,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19" (1/1) ... [2021-12-22 08:22:19,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:22:19,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:22:19,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:22:19,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:22:19,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19" (1/1) ... [2021-12-22 08:22:19,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:22:19,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:19,199 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 08:22:19,200 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 08:22:19,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:22:19,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 08:22:19,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 08:22:19,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:22:19,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:22:19,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 08:22:19,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:22:19,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:22:19,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 08:22:19,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:22:19,269 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:22:19,270 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:22:19,347 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:22:19,352 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:22:19,352 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 08:22:19,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:22:19 BoogieIcfgContainer [2021-12-22 08:22:19,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:22:19,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:22:19,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:22:19,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:22:19,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:22:18" (1/3) ... [2021-12-22 08:22:19,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@955b663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:22:19, skipping insertion in model container [2021-12-22 08:22:19,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:19" (2/3) ... [2021-12-22 08:22:19,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@955b663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:22:19, skipping insertion in model container [2021-12-22 08:22:19,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:22:19" (3/3) ... [2021-12-22 08:22:19,364 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2021-12-22 08:22:19,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:22:19,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:22:19,398 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:22:19,403 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:22:19,403 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:22:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 08:22:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 08:22:19,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:19,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:19,418 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:19,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:19,422 INFO L85 PathProgramCache]: Analyzing trace with hash -687560493, now seen corresponding path program 1 times [2021-12-22 08:22:19,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:19,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429539401] [2021-12-22 08:22:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:19,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:19,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:19,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:22:19,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:19,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429539401] [2021-12-22 08:22:19,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429539401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:22:19,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:22:19,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:22:19,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120107592] [2021-12-22 08:22:19,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:22:19,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:22:19,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:22:19,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:22:19,580 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 08:22:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:19,596 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2021-12-22 08:22:19,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:22:19,599 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-22 08:22:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:19,603 INFO L225 Difference]: With dead ends: 47 [2021-12-22 08:22:19,603 INFO L226 Difference]: Without dead ends: 21 [2021-12-22 08:22:19,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 08:22:19,616 INFO L933 BasicCegarLoop]: 28 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, 28 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 08:22:19,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:22:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-22 08:22:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-22 08:22:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 08:22:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-22 08:22:19,686 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2021-12-22 08:22:19,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:19,687 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-22 08:22:19,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 08:22:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-22 08:22:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 08:22:19,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:19,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:19,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:22:19,689 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:19,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1294753969, now seen corresponding path program 1 times [2021-12-22 08:22:19,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:19,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485730385] [2021-12-22 08:22:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:19,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:19,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:19,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:22:19,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:19,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485730385] [2021-12-22 08:22:19,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485730385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:22:19,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:22:19,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:22:19,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135517623] [2021-12-22 08:22:19,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:22:19,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:22:19,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:19,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:22:19,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:22:19,804 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 08:22:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:19,853 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-22 08:22:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:22:19,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-22 08:22:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:19,856 INFO L225 Difference]: With dead ends: 39 [2021-12-22 08:22:19,856 INFO L226 Difference]: Without dead ends: 31 [2021-12-22 08:22:19,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:22:19,857 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:19,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:22:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-22 08:22:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2021-12-22 08:22:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 08:22:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-22 08:22:19,864 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2021-12-22 08:22:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:19,864 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-22 08:22:19,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 08:22:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-22 08:22:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 08:22:19,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:19,865 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:19,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 08:22:19,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash -554531054, now seen corresponding path program 1 times [2021-12-22 08:22:19,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:19,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016826859] [2021-12-22 08:22:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:19,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:20,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:20,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:20,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:22:20,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:20,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016826859] [2021-12-22 08:22:20,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016826859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:20,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816971931] [2021-12-22 08:22:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:20,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:20,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:20,090 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 08:22:20,091 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 08:22:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:20,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-22 08:22:20,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:20,372 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 13 treesize of output 9 [2021-12-22 08:22:20,459 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 08:22:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:22:20,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:20,573 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 16 treesize of output 14 [2021-12-22 08:22:20,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 28 [2021-12-22 08:22:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:22:20,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816971931] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:20,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:20,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-12-22 08:22:20,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078169954] [2021-12-22 08:22:20,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:20,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 08:22:20,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:20,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 08:22:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-12-22 08:22:20,758 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 08:22:20,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:20,982 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-12-22 08:22:20,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 08:22:20,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2021-12-22 08:22:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:20,983 INFO L225 Difference]: With dead ends: 48 [2021-12-22 08:22:20,983 INFO L226 Difference]: Without dead ends: 46 [2021-12-22 08:22:20,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-12-22 08:22:20,985 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:20,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 154 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:22:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-22 08:22:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-12-22 08:22:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 08:22:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-22 08:22:20,990 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2021-12-22 08:22:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:20,991 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-22 08:22:20,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 08:22:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-22 08:22:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 08:22:20,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:20,992 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:21,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 08:22:21,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:21,195 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1909003512, now seen corresponding path program 1 times [2021-12-22 08:22:21,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:21,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333162349] [2021-12-22 08:22:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:21,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:21,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:21,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:21,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:22:21,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:21,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333162349] [2021-12-22 08:22:21,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333162349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:21,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475409702] [2021-12-22 08:22:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:21,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:21,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:21,286 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 08:22:21,287 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 08:22:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:21,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:22:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:22:21,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:22:21,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475409702] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:21,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:21,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-22 08:22:21,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87636862] [2021-12-22 08:22:21,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:21,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 08:22:21,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:21,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 08:22:21,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:22:21,445 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 08:22:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:21,490 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-12-22 08:22:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:22:21,491 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-12-22 08:22:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:21,492 INFO L225 Difference]: With dead ends: 53 [2021-12-22 08:22:21,492 INFO L226 Difference]: Without dead ends: 41 [2021-12-22 08:22:21,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:22:21,493 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:21,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 85 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:22:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-22 08:22:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-12-22 08:22:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 08:22:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-22 08:22:21,497 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2021-12-22 08:22:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:21,497 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-22 08:22:21,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 08:22:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-22 08:22:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 08:22:21,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:21,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:21,517 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 08:22:21,717 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,SelfDestructingSolverStorable3 [2021-12-22 08:22:21,718 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:21,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1118110763, now seen corresponding path program 2 times [2021-12-22 08:22:21,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:21,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040249526] [2021-12-22 08:22:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:21,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:21,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:21,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:21,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:21,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:22:21,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:21,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040249526] [2021-12-22 08:22:21,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040249526] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:21,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722269431] [2021-12-22 08:22:21,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:22:21,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:21,940 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 08:22:21,941 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 08:22:21,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:22:21,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:21,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 08:22:21,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:22,087 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 08:22:22,170 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:22,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:22,194 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 08:22:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:22:22,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:22,301 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 19 [2021-12-22 08:22:22,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:22:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:22:22,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722269431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:22,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:22,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2021-12-22 08:22:22,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024723776] [2021-12-22 08:22:22,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:22,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 08:22:22,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 08:22:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-12-22 08:22:22,446 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-22 08:22:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:22,648 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-12-22 08:22:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 08:22:22,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2021-12-22 08:22:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:22,651 INFO L225 Difference]: With dead ends: 55 [2021-12-22 08:22:22,651 INFO L226 Difference]: Without dead ends: 53 [2021-12-22 08:22:22,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-12-22 08:22:22,652 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:22,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 191 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 235 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2021-12-22 08:22:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-22 08:22:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2021-12-22 08:22:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 08:22:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-12-22 08:22:22,657 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 35 [2021-12-22 08:22:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:22,658 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-12-22 08:22:22,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-22 08:22:22,658 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-12-22 08:22:22,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 08:22:22,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:22,659 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:22,677 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 08:22:22,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:22,870 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1711359563, now seen corresponding path program 2 times [2021-12-22 08:22:22,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:22,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510583467] [2021-12-22 08:22:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:22,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:22,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:22,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:23,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:23,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:22:23,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:23,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510583467] [2021-12-22 08:22:23,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510583467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:23,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076601901] [2021-12-22 08:22:23,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:22:23,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:23,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:23,018 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 08:22:23,019 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 08:22:23,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:22:23,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:23,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 08:22:23,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:23,174 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 08:22:23,354 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-22 08:22:23,354 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2021-12-22 08:22:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:22:23,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:23,555 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 20 treesize of output 18 [2021-12-22 08:22:23,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 42 treesize of output 36 [2021-12-22 08:22:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:22:23,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076601901] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:23,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:23,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2021-12-22 08:22:23,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73309175] [2021-12-22 08:22:23,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:23,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 08:22:23,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:23,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 08:22:23,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-12-22 08:22:23,779 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-22 08:22:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:24,142 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-12-22 08:22:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 08:22:24,143 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2021-12-22 08:22:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:24,143 INFO L225 Difference]: With dead ends: 54 [2021-12-22 08:22:24,143 INFO L226 Difference]: Without dead ends: 42 [2021-12-22 08:22:24,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 08:22:24,144 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:24,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 248 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 178 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2021-12-22 08:22:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-22 08:22:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-22 08:22:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 08:22:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-22 08:22:24,153 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 39 [2021-12-22 08:22:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:24,154 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-22 08:22:24,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-22 08:22:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-22 08:22:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 08:22:24,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:24,158 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:24,189 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 08:22:24,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:24,358 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash -181817714, now seen corresponding path program 3 times [2021-12-22 08:22:24,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:24,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009881536] [2021-12-22 08:22:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:24,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:24,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:24,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:24,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:24,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:24,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 08:22:24,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:24,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009881536] [2021-12-22 08:22:24,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009881536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:24,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959840163] [2021-12-22 08:22:24,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:22:24,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:24,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:24,554 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 08:22:24,555 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 08:22:24,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-22 08:22:24,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:24,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-22 08:22:24,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:24,733 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 08:22:24,890 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-22 08:22:24,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-22 08:22:24,946 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 23 treesize of output 7 [2021-12-22 08:22:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:22:24,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:25,066 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 19 [2021-12-22 08:22:25,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:22:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 08:22:25,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959840163] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:25,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:25,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 26 [2021-12-22 08:22:25,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443617671] [2021-12-22 08:22:25,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:25,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 08:22:25,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:25,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 08:22:25,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-12-22 08:22:25,236 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 21 states have internal predecessors, (54), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-22 08:22:25,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:25,501 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-22 08:22:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 08:22:25,502 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 21 states have internal predecessors, (54), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 47 [2021-12-22 08:22:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:25,502 INFO L225 Difference]: With dead ends: 60 [2021-12-22 08:22:25,502 INFO L226 Difference]: Without dead ends: 58 [2021-12-22 08:22:25,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 08:22:25,503 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:25,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 256 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 288 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2021-12-22 08:22:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-22 08:22:25,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-12-22 08:22:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 08:22:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-12-22 08:22:25,509 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 47 [2021-12-22 08:22:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:25,509 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-12-22 08:22:25,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 21 states have internal predecessors, (54), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-22 08:22:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-12-22 08:22:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 08:22:25,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:25,510 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:25,537 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 08:22:25,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:25,710 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:25,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:25,711 INFO L85 PathProgramCache]: Analyzing trace with hash 513051739, now seen corresponding path program 3 times [2021-12-22 08:22:25,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:25,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532048744] [2021-12-22 08:22:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:25,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:25,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:25,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:25,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:25,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:25,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:25,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 08:22:25,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532048744] [2021-12-22 08:22:25,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532048744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10725029] [2021-12-22 08:22:25,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:22:25,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:25,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:25,861 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 08:22:25,862 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 08:22:25,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-22 08:22:25,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 08:22:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:25,985 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 08:22:26,040 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:26,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:26,104 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:26,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:26,172 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:26,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:26,193 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 08:22:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:22:26,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:26,375 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 19 [2021-12-22 08:22:26,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:22:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 08:22:26,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10725029] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:26,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:26,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 22 [2021-12-22 08:22:26,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50189367] [2021-12-22 08:22:26,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:26,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 08:22:26,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:26,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 08:22:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-12-22 08:22:26,500 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-22 08:22:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:26,645 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-12-22 08:22:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 08:22:26,646 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 51 [2021-12-22 08:22:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:26,646 INFO L225 Difference]: With dead ends: 60 [2021-12-22 08:22:26,647 INFO L226 Difference]: Without dead ends: 58 [2021-12-22 08:22:26,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-12-22 08:22:26,648 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:26,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 143 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 205 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2021-12-22 08:22:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-22 08:22:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-12-22 08:22:26,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 08:22:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-12-22 08:22:26,653 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 51 [2021-12-22 08:22:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:26,654 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-12-22 08:22:26,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-22 08:22:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-12-22 08:22:26,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 08:22:26,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:26,664 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:26,683 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 08:22:26,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:26,881 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:26,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:26,882 INFO L85 PathProgramCache]: Analyzing trace with hash -581569404, now seen corresponding path program 4 times [2021-12-22 08:22:26,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:26,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931015474] [2021-12-22 08:22:26,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:26,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:27,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:27,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:27,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:27,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:27,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 08:22:27,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:27,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931015474] [2021-12-22 08:22:27,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931015474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:27,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433916113] [2021-12-22 08:22:27,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:22:27,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:27,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:27,106 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 08:22:27,107 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 08:22:27,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:22:27,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:27,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-22 08:22:27,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:27,314 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 13 treesize of output 9 [2021-12-22 08:22:27,408 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 08:22:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 08:22:27,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:27,510 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 16 treesize of output 14 [2021-12-22 08:22:27,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 28 [2021-12-22 08:22:27,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433916113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:27,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:22:27,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-12-22 08:22:27,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458838828] [2021-12-22 08:22:27,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:27,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 08:22:27,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:27,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 08:22:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-12-22 08:22:27,605 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-22 08:22:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:28,193 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-12-22 08:22:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 08:22:28,193 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 51 [2021-12-22 08:22:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:28,194 INFO L225 Difference]: With dead ends: 86 [2021-12-22 08:22:28,194 INFO L226 Difference]: Without dead ends: 84 [2021-12-22 08:22:28,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=352, Invalid=2098, Unknown=0, NotChecked=0, Total=2450 [2021-12-22 08:22:28,195 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 178 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:28,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 260 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:22:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-22 08:22:28,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2021-12-22 08:22:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 08:22:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-22 08:22:28,201 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 51 [2021-12-22 08:22:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:28,202 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-22 08:22:28,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-22 08:22:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-22 08:22:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 08:22:28,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:28,202 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:28,221 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 08:22:28,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:28,425 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2001937361, now seen corresponding path program 5 times [2021-12-22 08:22:28,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:28,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028896135] [2021-12-22 08:22:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:28,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:28,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:28,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:28,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:28,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:28,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:28,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 08:22:28,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:28,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028896135] [2021-12-22 08:22:28,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028896135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:28,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259905462] [2021-12-22 08:22:28,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 08:22:28,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:28,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:28,644 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 08:22:28,654 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 08:22:28,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-22 08:22:28,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:28,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 08:22:28,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:28,828 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 08:22:28,899 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:28,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:28,977 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:28,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:29,018 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 23 treesize of output 7 [2021-12-22 08:22:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 32 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 08:22:29,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:29,183 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 19 [2021-12-22 08:22:29,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:22:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 44 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-22 08:22:29,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259905462] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:29,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:29,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 27 [2021-12-22 08:22:29,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995974554] [2021-12-22 08:22:29,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:29,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 08:22:29,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 08:22:29,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-12-22 08:22:29,380 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 22 states have internal predecessors, (59), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-22 08:22:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:29,628 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-12-22 08:22:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 08:22:29,629 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 22 states have internal predecessors, (59), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) Word has length 55 [2021-12-22 08:22:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:29,629 INFO L225 Difference]: With dead ends: 73 [2021-12-22 08:22:29,630 INFO L226 Difference]: Without dead ends: 71 [2021-12-22 08:22:29,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 08:22:29,630 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:29,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 230 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 325 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2021-12-22 08:22:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-22 08:22:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2021-12-22 08:22:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 08:22:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-22 08:22:29,637 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 55 [2021-12-22 08:22:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:29,637 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-22 08:22:29,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 22 states have internal predecessors, (59), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-22 08:22:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-22 08:22:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 08:22:29,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:29,638 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:29,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:29,851 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,SelfDestructingSolverStorable9 [2021-12-22 08:22:29,852 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:29,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1453174918, now seen corresponding path program 6 times [2021-12-22 08:22:29,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:29,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175120587] [2021-12-22 08:22:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:29,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:29,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:29,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:29,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:29,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:29,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 08:22:29,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:29,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175120587] [2021-12-22 08:22:29,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175120587] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:29,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204009158] [2021-12-22 08:22:29,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 08:22:29,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:29,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:29,934 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 08:22:29,935 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 08:22:29,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-22 08:22:29,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:29,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 08:22:29,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 08:22:30,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 08:22:30,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204009158] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:30,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:30,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-22 08:22:30,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395939363] [2021-12-22 08:22:30,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:30,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 08:22:30,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:30,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 08:22:30,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-22 08:22:30,187 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-22 08:22:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:30,282 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-12-22 08:22:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 08:22:30,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 55 [2021-12-22 08:22:30,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:30,283 INFO L225 Difference]: With dead ends: 89 [2021-12-22 08:22:30,283 INFO L226 Difference]: Without dead ends: 69 [2021-12-22 08:22:30,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-22 08:22:30,284 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:30,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 153 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:22:30,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-22 08:22:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-12-22 08:22:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 08:22:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-12-22 08:22:30,298 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 55 [2021-12-22 08:22:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:30,298 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-12-22 08:22:30,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-22 08:22:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-12-22 08:22:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 08:22:30,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:30,299 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:30,319 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 08:22:30,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:30,516 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:30,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:30,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1754460089, now seen corresponding path program 7 times [2021-12-22 08:22:30,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:30,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826704371] [2021-12-22 08:22:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:30,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:30,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:30,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:30,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:30,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:30,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:30,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 08:22:30,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:30,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826704371] [2021-12-22 08:22:30,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826704371] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:30,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064735825] [2021-12-22 08:22:30,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 08:22:30,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:30,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:30,758 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 08:22:30,789 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 08:22:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:30,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-22 08:22:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:30,962 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 08:22:31,048 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:31,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:31,134 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 08:22:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 08:22:31,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:31,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064735825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:31,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:22:31,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-12-22 08:22:31,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707938866] [2021-12-22 08:22:31,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:31,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 08:22:31,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:31,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 08:22:31,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 08:22:31,270 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-22 08:22:31,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:31,751 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-12-22 08:22:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 08:22:31,752 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 59 [2021-12-22 08:22:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:31,752 INFO L225 Difference]: With dead ends: 84 [2021-12-22 08:22:31,752 INFO L226 Difference]: Without dead ends: 82 [2021-12-22 08:22:31,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 08:22:31,753 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:31,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 356 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 540 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2021-12-22 08:22:31,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-22 08:22:31,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2021-12-22 08:22:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-22 08:22:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-12-22 08:22:31,767 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 59 [2021-12-22 08:22:31,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:31,767 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-12-22 08:22:31,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-22 08:22:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-12-22 08:22:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 08:22:31,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:31,770 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:31,786 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 08:22:31,979 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,SelfDestructingSolverStorable11 [2021-12-22 08:22:31,979 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:31,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:31,980 INFO L85 PathProgramCache]: Analyzing trace with hash 120574397, now seen corresponding path program 8 times [2021-12-22 08:22:31,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:31,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184301525] [2021-12-22 08:22:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:31,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:32,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:32,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:32,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:32,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:32,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:32,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 08:22:32,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:32,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184301525] [2021-12-22 08:22:32,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184301525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:32,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111991197] [2021-12-22 08:22:32,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:22:32,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:32,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:32,169 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 08:22:32,170 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 08:22:32,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:22:32,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:32,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-22 08:22:32,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:32,447 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 08:22:32,722 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-22 08:22:32,725 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2021-12-22 08:22:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 08:22:32,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:33,081 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 20 treesize of output 18 [2021-12-22 08:22:33,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 42 treesize of output 36 [2021-12-22 08:22:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 08:22:33,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111991197] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:33,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:33,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2021-12-22 08:22:33,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926112998] [2021-12-22 08:22:33,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:33,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-22 08:22:33,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:33,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-22 08:22:33,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1754, Unknown=0, NotChecked=0, Total=1980 [2021-12-22 08:22:33,425 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 45 states, 44 states have (on average 2.227272727272727) internal successors, (98), 40 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-22 08:22:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:34,073 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-12-22 08:22:34,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 08:22:34,073 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.227272727272727) internal successors, (98), 40 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 63 [2021-12-22 08:22:34,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:34,074 INFO L225 Difference]: With dead ends: 80 [2021-12-22 08:22:34,074 INFO L226 Difference]: Without dead ends: 60 [2021-12-22 08:22:34,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=552, Invalid=4004, Unknown=0, NotChecked=0, Total=4556 [2021-12-22 08:22:34,075 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:34,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 332 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 285 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2021-12-22 08:22:34,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-22 08:22:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-22 08:22:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-22 08:22:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-12-22 08:22:34,080 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 63 [2021-12-22 08:22:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:34,080 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-12-22 08:22:34,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.227272727272727) internal successors, (98), 40 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-22 08:22:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-12-22 08:22:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 08:22:34,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:34,081 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:34,097 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 08:22:34,289 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,SelfDestructingSolverStorable12 [2021-12-22 08:22:34,289 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1918482698, now seen corresponding path program 9 times [2021-12-22 08:22:34,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:34,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526268697] [2021-12-22 08:22:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:34,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:34,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:34,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:34,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:34,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:34,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:34,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:34,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:22:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 08:22:34,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:34,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526268697] [2021-12-22 08:22:34,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526268697] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:34,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336732962] [2021-12-22 08:22:34,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:22:34,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:34,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:34,548 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 08:22:34,550 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 08:22:34,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-22 08:22:34,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:34,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-22 08:22:34,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:34,760 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 08:22:34,862 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:34,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:34,941 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:34,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:35,040 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 08:22:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 43 proven. 68 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 08:22:35,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:35,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336732962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:35,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:22:35,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-12-22 08:22:35,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092018429] [2021-12-22 08:22:35,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:35,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-22 08:22:35,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:35,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-22 08:22:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 08:22:35,191 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 27 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-22 08:22:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:35,683 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2021-12-22 08:22:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 08:22:35,683 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 27 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 67 [2021-12-22 08:22:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:35,684 INFO L225 Difference]: With dead ends: 74 [2021-12-22 08:22:35,684 INFO L226 Difference]: Without dead ends: 72 [2021-12-22 08:22:35,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=2430, Unknown=0, NotChecked=0, Total=2756 [2021-12-22 08:22:35,685 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 55 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:35,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 453 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 647 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2021-12-22 08:22:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-22 08:22:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2021-12-22 08:22:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-22 08:22:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-12-22 08:22:35,690 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 67 [2021-12-22 08:22:35,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:35,691 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-12-22 08:22:35,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 27 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-22 08:22:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-12-22 08:22:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 08:22:35,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:35,691 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:35,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:35,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 08:22:35,903 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -700161792, now seen corresponding path program 10 times [2021-12-22 08:22:35,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:35,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581228372] [2021-12-22 08:22:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:35,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:36,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:36,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:36,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:36,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:36,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:36,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:36,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:22:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 08:22:36,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:36,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581228372] [2021-12-22 08:22:36,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581228372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:36,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347741198] [2021-12-22 08:22:36,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:22:36,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:36,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:36,118 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:22:36,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 08:22:36,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:22:36,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:36,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-22 08:22:36,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:36,377 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 08:22:38,566 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-22 08:22:38,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-22 08:22:38,681 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 23 treesize of output 7 [2021-12-22 08:22:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 08:22:38,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:38,833 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 19 [2021-12-22 08:22:38,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:22:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 08:22:39,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347741198] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:39,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:39,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 32 [2021-12-22 08:22:39,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355528145] [2021-12-22 08:22:39,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:39,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 08:22:39,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:39,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 08:22:39,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=880, Unknown=1, NotChecked=0, Total=992 [2021-12-22 08:22:39,031 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.53125) internal successors, (81), 28 states have internal predecessors, (81), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-22 08:22:39,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:39,303 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-12-22 08:22:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 08:22:39,304 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 28 states have internal predecessors, (81), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 71 [2021-12-22 08:22:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:39,304 INFO L225 Difference]: With dead ends: 92 [2021-12-22 08:22:39,304 INFO L226 Difference]: Without dead ends: 90 [2021-12-22 08:22:39,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 135 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=183, Invalid=1456, Unknown=1, NotChecked=0, Total=1640 [2021-12-22 08:22:39,305 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:39,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 276 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 436 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-22 08:22:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-22 08:22:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2021-12-22 08:22:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 08:22:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-12-22 08:22:39,318 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 71 [2021-12-22 08:22:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:39,318 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-12-22 08:22:39,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 28 states have internal predecessors, (81), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-22 08:22:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-12-22 08:22:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-22 08:22:39,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:39,319 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:39,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:39,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 08:22:39,534 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:39,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1947082230, now seen corresponding path program 11 times [2021-12-22 08:22:39,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:39,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439012820] [2021-12-22 08:22:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:39,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:39,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:39,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:39,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:39,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:39,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:39,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:39,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:22:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 08:22:39,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:39,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439012820] [2021-12-22 08:22:39,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439012820] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:39,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600616005] [2021-12-22 08:22:39,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 08:22:39,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:39,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:39,764 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:22:39,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 08:22:39,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-22 08:22:39,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:39,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-22 08:22:39,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:40,077 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 13 treesize of output 9 [2021-12-22 08:22:40,202 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 23 treesize of output 7 [2021-12-22 08:22:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 08:22:40,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:40,303 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 16 treesize of output 14 [2021-12-22 08:22:40,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 28 [2021-12-22 08:22:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 08:22:40,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600616005] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:40,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:40,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 32 [2021-12-22 08:22:40,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763771727] [2021-12-22 08:22:40,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:40,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 08:22:40,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:40,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 08:22:40,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-12-22 08:22:40,517 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 32 states, 32 states have (on average 2.6875) internal successors, (86), 28 states have internal predecessors, (86), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-22 08:22:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:41,125 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2021-12-22 08:22:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 08:22:41,125 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 28 states have internal predecessors, (86), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 75 [2021-12-22 08:22:41,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:41,126 INFO L225 Difference]: With dead ends: 118 [2021-12-22 08:22:41,126 INFO L226 Difference]: Without dead ends: 116 [2021-12-22 08:22:41,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 145 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=316, Invalid=2440, Unknown=0, NotChecked=0, Total=2756 [2021-12-22 08:22:41,127 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 132 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:41,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 488 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:22:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-22 08:22:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2021-12-22 08:22:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 08:22:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-12-22 08:22:41,137 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 75 [2021-12-22 08:22:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:41,137 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-12-22 08:22:41,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 28 states have internal predecessors, (86), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-22 08:22:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-12-22 08:22:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 08:22:41,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:41,138 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:41,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:41,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:41,340 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1497562435, now seen corresponding path program 12 times [2021-12-22 08:22:41,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:41,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707142619] [2021-12-22 08:22:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:41,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:41,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:41,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:41,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:41,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:41,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:41,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:41,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:22:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:41,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:22:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 08:22:41,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:41,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707142619] [2021-12-22 08:22:41,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707142619] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:41,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968441597] [2021-12-22 08:22:41,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 08:22:41,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:41,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:41,577 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:22:41,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 08:22:41,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-22 08:22:41,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:41,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-22 08:22:41,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:41,860 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 08:22:41,936 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:41,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:42,024 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:42,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:42,130 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 23 treesize of output 7 [2021-12-22 08:22:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 54 proven. 102 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 08:22:42,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:42,316 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 19 [2021-12-22 08:22:42,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:22:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 104 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-22 08:22:42,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968441597] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:42,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:42,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2021-12-22 08:22:42,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492496409] [2021-12-22 08:22:42,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:42,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 08:22:42,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:42,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 08:22:42,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 08:22:42,519 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 08:22:42,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:42,913 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2021-12-22 08:22:42,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-22 08:22:42,913 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) Word has length 79 [2021-12-22 08:22:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:42,914 INFO L225 Difference]: With dead ends: 105 [2021-12-22 08:22:42,914 INFO L226 Difference]: Without dead ends: 103 [2021-12-22 08:22:42,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 148 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 08:22:42,915 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 62 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:42,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 392 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 756 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2021-12-22 08:22:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-22 08:22:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2021-12-22 08:22:42,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 08:22:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-12-22 08:22:42,922 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 79 [2021-12-22 08:22:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:42,922 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-12-22 08:22:42,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 08:22:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-12-22 08:22:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 08:22:42,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:42,923 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:42,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:43,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 08:22:43,124 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:43,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1814327276, now seen corresponding path program 13 times [2021-12-22 08:22:43,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:43,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332805198] [2021-12-22 08:22:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:43,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:43,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:43,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:43,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:43,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:43,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:43,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:43,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:22:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-22 08:22:43,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:43,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332805198] [2021-12-22 08:22:43,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332805198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:43,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584495156] [2021-12-22 08:22:43,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 08:22:43,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:43,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:43,226 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:22:43,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 08:22:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 08:22:43,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-22 08:22:43,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-22 08:22:43,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584495156] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:43,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:43,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-22 08:22:43,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969702057] [2021-12-22 08:22:43,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:43,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 08:22:43,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:43,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 08:22:43,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-22 08:22:43,598 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-22 08:22:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:43,716 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-12-22 08:22:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 08:22:43,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2021-12-22 08:22:43,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:43,717 INFO L225 Difference]: With dead ends: 121 [2021-12-22 08:22:43,717 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 08:22:43,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-22 08:22:43,718 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 110 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:43,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 170 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:22:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 08:22:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-12-22 08:22:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 08:22:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-12-22 08:22:43,725 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 79 [2021-12-22 08:22:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:43,726 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-12-22 08:22:43,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-22 08:22:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-12-22 08:22:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 08:22:43,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:43,727 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:43,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:43,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 08:22:43,931 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:43,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:43,932 INFO L85 PathProgramCache]: Analyzing trace with hash -502341447, now seen corresponding path program 14 times [2021-12-22 08:22:43,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:43,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152385061] [2021-12-22 08:22:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:43,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:44,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:44,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:44,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:44,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:44,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:44,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:44,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:22:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:44,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:22:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 08:22:44,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:44,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152385061] [2021-12-22 08:22:44,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152385061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:44,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25881671] [2021-12-22 08:22:44,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:22:44,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:44,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:44,149 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:22:44,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-22 08:22:44,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:22:44,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:44,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-22 08:22:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:44,468 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 08:22:46,615 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-22 08:22:46,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-22 08:22:46,803 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 23 treesize of output 7 [2021-12-22 08:22:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 40 proven. 116 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 08:22:46,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:46,964 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 19 [2021-12-22 08:22:46,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:22:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 08:22:47,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25881671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:47,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:47,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2021-12-22 08:22:47,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625378260] [2021-12-22 08:22:47,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:47,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 08:22:47,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:47,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 08:22:47,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1132, Unknown=1, NotChecked=0, Total=1260 [2021-12-22 08:22:47,195 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 32 states have internal predecessors, (95), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-22 08:22:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:47,566 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2021-12-22 08:22:47,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-22 08:22:47,567 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 32 states have internal predecessors, (95), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 83 [2021-12-22 08:22:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:47,567 INFO L225 Difference]: With dead ends: 108 [2021-12-22 08:22:47,567 INFO L226 Difference]: Without dead ends: 106 [2021-12-22 08:22:47,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=212, Invalid=1949, Unknown=1, NotChecked=0, Total=2162 [2021-12-22 08:22:47,572 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 44 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:47,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 526 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 688 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2021-12-22 08:22:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-22 08:22:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2021-12-22 08:22:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-22 08:22:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-22 08:22:47,581 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 83 [2021-12-22 08:22:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:47,582 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-22 08:22:47,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 32 states have internal predecessors, (95), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-22 08:22:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-22 08:22:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-22 08:22:47,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:47,582 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:47,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-22 08:22:47,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:47,793 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:47,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1833952977, now seen corresponding path program 15 times [2021-12-22 08:22:47,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:47,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021525487] [2021-12-22 08:22:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:47,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:47,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:47,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:48,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:48,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:48,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:48,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:48,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:22:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:48,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:22:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 08:22:48,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:48,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021525487] [2021-12-22 08:22:48,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021525487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:48,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415298012] [2021-12-22 08:22:48,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:22:48,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:48,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:48,051 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:22:48,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-22 08:22:48,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-22 08:22:48,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:48,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-22 08:22:48,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:48,440 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 08:22:48,874 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-22 08:22:48,874 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2021-12-22 08:22:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 08:22:48,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:49,205 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 16 treesize of output 14 [2021-12-22 08:22:49,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 28 [2021-12-22 08:22:49,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415298012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:49,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:22:49,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 38 [2021-12-22 08:22:49,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696080665] [2021-12-22 08:22:49,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:49,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-22 08:22:49,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:49,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-22 08:22:49,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2069, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 08:22:49,292 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 34 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-22 08:22:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:49,636 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-12-22 08:22:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 08:22:49,637 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 34 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 87 [2021-12-22 08:22:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:49,637 INFO L225 Difference]: With dead ends: 112 [2021-12-22 08:22:49,637 INFO L226 Difference]: Without dead ends: 110 [2021-12-22 08:22:49,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=368, Invalid=2602, Unknown=0, NotChecked=0, Total=2970 [2021-12-22 08:22:49,638 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 54 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:49,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 454 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 647 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2021-12-22 08:22:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-22 08:22:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2021-12-22 08:22:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-22 08:22:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-12-22 08:22:49,648 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 87 [2021-12-22 08:22:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:49,648 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-12-22 08:22:49,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 34 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-22 08:22:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-12-22 08:22:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 08:22:49,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:49,649 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:49,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:49,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:49,851 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:49,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash 474886268, now seen corresponding path program 16 times [2021-12-22 08:22:49,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:49,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097919206] [2021-12-22 08:22:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:49,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:50,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:50,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:50,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:50,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:50,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:50,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:50,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:22:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:50,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:22:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:50,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:22:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 147 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 08:22:50,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:50,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097919206] [2021-12-22 08:22:50,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097919206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:50,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474983241] [2021-12-22 08:22:50,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:22:50,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:50,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:50,081 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:22:50,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-22 08:22:50,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:22:50,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:50,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-22 08:22:50,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:50,412 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 08:22:50,488 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:50,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:50,571 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:22:50,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:22:50,696 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 23 treesize of output 7 [2021-12-22 08:22:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 65 proven. 144 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-22 08:22:50,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:50,897 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 19 [2021-12-22 08:22:50,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:22:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 146 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-22 08:22:51,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474983241] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:51,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:51,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2021-12-22 08:22:51,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074207450] [2021-12-22 08:22:51,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:51,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 08:22:51,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 08:22:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 08:22:51,143 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2021-12-22 08:22:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:51,637 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2021-12-22 08:22:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 08:22:51,638 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) Word has length 91 [2021-12-22 08:22:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:51,638 INFO L225 Difference]: With dead ends: 121 [2021-12-22 08:22:51,638 INFO L226 Difference]: Without dead ends: 119 [2021-12-22 08:22:51,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 172 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 08:22:51,640 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 78 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:51,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 606 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 990 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2021-12-22 08:22:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-22 08:22:51,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-12-22 08:22:51,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-22 08:22:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-12-22 08:22:51,649 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 91 [2021-12-22 08:22:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:51,650 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-12-22 08:22:51,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2021-12-22 08:22:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-12-22 08:22:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 08:22:51,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:51,651 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:51,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:51,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:51,856 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash 645146277, now seen corresponding path program 17 times [2021-12-22 08:22:51,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:51,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952441717] [2021-12-22 08:22:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:51,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:51,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:51,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:51,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:51,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:51,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:51,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:51,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:22:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:51,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:22:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-22 08:22:51,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:51,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952441717] [2021-12-22 08:22:51,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952441717] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:51,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319083613] [2021-12-22 08:22:51,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 08:22:51,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:51,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:51,989 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:22:51,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-22 08:22:52,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-22 08:22:52,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:52,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 08:22:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-22 08:22:52,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-22 08:22:52,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319083613] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:52,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:52,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-22 08:22:52,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261180480] [2021-12-22 08:22:52,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:52,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 08:22:52,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:52,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 08:22:52,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-22 08:22:52,414 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-22 08:22:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:52,546 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-12-22 08:22:52,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 08:22:52,548 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 91 [2021-12-22 08:22:52,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:52,548 INFO L225 Difference]: With dead ends: 137 [2021-12-22 08:22:52,549 INFO L226 Difference]: Without dead ends: 105 [2021-12-22 08:22:52,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 08:22:52,549 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:52,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 206 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:22:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-22 08:22:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2021-12-22 08:22:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-22 08:22:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-12-22 08:22:52,558 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 91 [2021-12-22 08:22:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:52,559 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-12-22 08:22:52,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-22 08:22:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-12-22 08:22:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 08:22:52,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:52,559 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:52,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:52,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-22 08:22:52,769 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:52,769 INFO L85 PathProgramCache]: Analyzing trace with hash -110375054, now seen corresponding path program 18 times [2021-12-22 08:22:52,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:52,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477075771] [2021-12-22 08:22:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:52,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:52,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:52,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:53,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:53,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:53,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:53,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:53,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:22:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:53,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:22:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:53,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:22:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 08:22:53,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:53,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477075771] [2021-12-22 08:22:53,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477075771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:53,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479808838] [2021-12-22 08:22:53,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 08:22:53,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:53,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:53,022 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:22:53,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-22 08:22:53,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-22 08:22:53,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:53,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-22 08:22:53,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:53,442 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 08:22:55,607 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-22 08:22:55,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-22 08:22:55,804 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 23 treesize of output 7 [2021-12-22 08:22:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 47 proven. 162 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 08:22:55,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:55,968 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 19 [2021-12-22 08:22:55,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:22:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 08:22:56,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479808838] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:56,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:22:56,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 40 [2021-12-22 08:22:56,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226646711] [2021-12-22 08:22:56,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:56,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-22 08:22:56,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:22:56,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-22 08:22:56,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1416, Unknown=1, NotChecked=0, Total=1560 [2021-12-22 08:22:56,203 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 40 states, 40 states have (on average 2.725) internal successors, (109), 36 states have internal predecessors, (109), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-12-22 08:22:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:58,657 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2021-12-22 08:22:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-22 08:22:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.725) internal successors, (109), 36 states have internal predecessors, (109), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) Word has length 95 [2021-12-22 08:22:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:58,658 INFO L225 Difference]: With dead ends: 124 [2021-12-22 08:22:58,658 INFO L226 Difference]: Without dead ends: 122 [2021-12-22 08:22:58,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 185 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=236, Invalid=2414, Unknown=2, NotChecked=0, Total=2652 [2021-12-22 08:22:58,659 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 77 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:58,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 511 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 916 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2021-12-22 08:22:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-22 08:22:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2021-12-22 08:22:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 08:22:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-12-22 08:22:58,670 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 95 [2021-12-22 08:22:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:58,671 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-12-22 08:22:58,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.725) internal successors, (109), 36 states have internal predecessors, (109), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-12-22 08:22:58,674 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-12-22 08:22:58,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 08:22:58,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:58,675 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:58,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:58,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-22 08:22:58,879 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1072364696, now seen corresponding path program 19 times [2021-12-22 08:22:58,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:22:58,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482203482] [2021-12-22 08:22:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:58,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:22:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:59,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:22:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:59,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:22:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:59,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:22:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:59,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:22:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:59,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:22:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:59,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:22:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:59,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:22:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:59,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:22:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:59,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:22:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 08:22:59,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482203482] [2021-12-22 08:22:59,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482203482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:22:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009849022] [2021-12-22 08:22:59,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 08:22:59,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:22:59,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:59,138 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:22:59,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-22 08:22:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:59,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-22 08:22:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:59,555 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 13 treesize of output 9 [2021-12-22 08:22:59,752 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 23 treesize of output 7 [2021-12-22 08:22:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 08:22:59,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:59,868 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 16 treesize of output 14 [2021-12-22 08:22:59,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 28 [2021-12-22 08:23:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 08:23:00,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009849022] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:23:00,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:23:00,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 40 [2021-12-22 08:23:00,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568884855] [2021-12-22 08:23:00,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:23:00,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-22 08:23:00,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:23:00,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-22 08:23:00,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1432, Unknown=0, NotChecked=0, Total=1560 [2021-12-22 08:23:00,130 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 40 states, 40 states have (on average 2.85) internal successors, (114), 36 states have internal predecessors, (114), 15 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-12-22 08:23:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:23:01,022 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2021-12-22 08:23:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-22 08:23:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.85) internal successors, (114), 36 states have internal predecessors, (114), 15 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) Word has length 99 [2021-12-22 08:23:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:23:01,024 INFO L225 Difference]: With dead ends: 150 [2021-12-22 08:23:01,024 INFO L226 Difference]: Without dead ends: 148 [2021-12-22 08:23:01,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 193 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=410, Invalid=4012, Unknown=0, NotChecked=0, Total=4422 [2021-12-22 08:23:01,026 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 175 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:23:01,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 728 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 08:23:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-22 08:23:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2021-12-22 08:23:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 08:23:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-12-22 08:23:01,037 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 99 [2021-12-22 08:23:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:23:01,038 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-12-22 08:23:01,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.85) internal successors, (114), 36 states have internal predecessors, (114), 15 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-12-22 08:23:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-12-22 08:23:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 08:23:01,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:23:01,039 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:23:01,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-22 08:23:01,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:01,242 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:23:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:23:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash -369454411, now seen corresponding path program 20 times [2021-12-22 08:23:01,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:23:01,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663518718] [2021-12-22 08:23:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:23:01,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:23:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:01,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:23:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:01,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:23:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:01,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:23:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:01,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:23:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:01,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:23:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:01,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:23:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:01,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:23:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:01,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:23:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:01,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:23:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:01,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 08:23:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 197 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-22 08:23:01,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:23:01,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663518718] [2021-12-22 08:23:01,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663518718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:23:01,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267288914] [2021-12-22 08:23:01,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:23:01,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:01,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:23:01,535 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:23:01,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-22 08:23:01,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:23:01,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:23:01,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-22 08:23:01,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:23:01,936 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 08:23:02,027 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:23:02,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:23:02,110 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:23:02,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:23:02,272 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 23 treesize of output 7 [2021-12-22 08:23:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 76 proven. 194 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-22 08:23:02,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:23:02,475 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 19 [2021-12-22 08:23:02,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:23:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 196 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-22 08:23:02,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267288914] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:23:02,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:23:02,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2021-12-22 08:23:02,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704744057] [2021-12-22 08:23:02,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:23:02,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-22 08:23:02,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:23:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-22 08:23:02,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2021-12-22 08:23:02,739 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-22 08:23:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:23:03,175 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2021-12-22 08:23:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-22 08:23:03,175 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) Word has length 103 [2021-12-22 08:23:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:23:03,176 INFO L225 Difference]: With dead ends: 132 [2021-12-22 08:23:03,176 INFO L226 Difference]: Without dead ends: 130 [2021-12-22 08:23:03,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 201 SyntacticMatches, 13 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=2414, Unknown=0, NotChecked=0, Total=2652 [2021-12-22 08:23:03,176 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 85 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:23:03,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 587 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 844 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2021-12-22 08:23:03,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-22 08:23:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2021-12-22 08:23:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 08:23:03,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-12-22 08:23:03,188 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 103 [2021-12-22 08:23:03,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:23:03,189 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-12-22 08:23:03,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-22 08:23:03,189 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-12-22 08:23:03,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 08:23:03,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:23:03,190 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:23:03,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-22 08:23:03,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:03,401 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:23:03,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:23:03,402 INFO L85 PathProgramCache]: Analyzing trace with hash -428389282, now seen corresponding path program 21 times [2021-12-22 08:23:03,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:23:03,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522476671] [2021-12-22 08:23:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:23:03,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:23:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:03,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:23:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:03,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:23:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:03,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:23:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:03,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:23:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:03,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:23:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:03,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:23:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:03,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:23:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:03,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:23:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:03,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:23:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-22 08:23:03,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:23:03,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522476671] [2021-12-22 08:23:03,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522476671] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:23:03,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877334849] [2021-12-22 08:23:03,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:23:03,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:03,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:23:03,534 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:23:03,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-22 08:23:03,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-22 08:23:03,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:23:03,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 08:23:03,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:23:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-22 08:23:03,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:23:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-22 08:23:04,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877334849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:23:04,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:23:04,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-12-22 08:23:04,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418362883] [2021-12-22 08:23:04,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:23:04,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 08:23:04,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:23:04,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 08:23:04,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-12-22 08:23:04,124 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-22 08:23:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:23:04,276 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-12-22 08:23:04,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 08:23:04,277 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 103 [2021-12-22 08:23:04,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:23:04,277 INFO L225 Difference]: With dead ends: 153 [2021-12-22 08:23:04,277 INFO L226 Difference]: Without dead ends: 117 [2021-12-22 08:23:04,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 08:23:04,278 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 148 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:23:04,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 185 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:23:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-22 08:23:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2021-12-22 08:23:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 08:23:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2021-12-22 08:23:04,289 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 103 [2021-12-22 08:23:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:23:04,290 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2021-12-22 08:23:04,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-22 08:23:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2021-12-22 08:23:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-22 08:23:04,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:23:04,290 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:23:04,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-22 08:23:04,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-22 08:23:04,508 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:23:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:23:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2033872171, now seen corresponding path program 22 times [2021-12-22 08:23:04,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:23:04,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081435720] [2021-12-22 08:23:04,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:23:04,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:23:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:04,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:23:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:04,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:23:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:04,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:23:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:04,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:23:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:04,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:23:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:04,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:23:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:04,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:23:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:04,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:23:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:04,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:23:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:04,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 08:23:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-22 08:23:04,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:23:04,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081435720] [2021-12-22 08:23:04,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081435720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:23:04,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686714044] [2021-12-22 08:23:04,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:23:04,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:04,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:23:04,793 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:23:04,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-22 08:23:04,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:23:04,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:23:04,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-22 08:23:04,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:23:05,220 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 08:23:05,380 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-22 08:23:05,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-22 08:23:05,598 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 23 treesize of output 7 [2021-12-22 08:23:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 54 proven. 216 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 08:23:05,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:23:05,769 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 19 [2021-12-22 08:23:05,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:23:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-22 08:23:06,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686714044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:23:06,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:23:06,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 44 [2021-12-22 08:23:06,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336172048] [2021-12-22 08:23:06,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:23:06,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-22 08:23:06,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:23:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-22 08:23:06,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1733, Unknown=0, NotChecked=0, Total=1892 [2021-12-22 08:23:06,025 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 40 states have internal predecessors, (123), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-22 08:23:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:23:06,509 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2021-12-22 08:23:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-22 08:23:06,509 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 40 states have internal predecessors, (123), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) Word has length 107 [2021-12-22 08:23:06,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:23:06,510 INFO L225 Difference]: With dead ends: 140 [2021-12-22 08:23:06,510 INFO L226 Difference]: Without dead ends: 138 [2021-12-22 08:23:06,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 210 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=260, Invalid=2932, Unknown=0, NotChecked=0, Total=3192 [2021-12-22 08:23:06,510 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 85 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:23:06,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 476 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 889 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2021-12-22 08:23:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-22 08:23:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2021-12-22 08:23:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 08:23:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2021-12-22 08:23:06,526 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 107 [2021-12-22 08:23:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:23:06,528 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2021-12-22 08:23:06,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 40 states have internal predecessors, (123), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-22 08:23:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2021-12-22 08:23:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 08:23:06,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:23:06,532 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:23:06,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-22 08:23:06,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-22 08:23:06,735 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:23:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:23:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1467751585, now seen corresponding path program 23 times [2021-12-22 08:23:06,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:23:06,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97011528] [2021-12-22 08:23:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:23:06,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:23:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:06,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:23:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:06,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:23:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:07,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:23:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:07,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:23:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:07,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:23:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:07,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:23:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:07,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:23:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:07,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:23:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:07,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:23:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:07,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 08:23:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-22 08:23:07,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:23:07,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97011528] [2021-12-22 08:23:07,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97011528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:23:07,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630033633] [2021-12-22 08:23:07,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 08:23:07,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:07,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:23:07,037 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:23:07,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-22 08:23:07,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-22 08:23:07,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:23:07,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-22 08:23:07,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:23:07,512 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 13 treesize of output 9 [2021-12-22 08:23:07,756 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 23 treesize of output 7 [2021-12-22 08:23:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-22 08:23:07,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:23:07,879 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 16 treesize of output 14 [2021-12-22 08:23:07,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 28 [2021-12-22 08:23:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-22 08:23:08,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630033633] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:23:08,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:23:08,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 44 [2021-12-22 08:23:08,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676693326] [2021-12-22 08:23:08,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:23:08,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-22 08:23:08,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:23:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-22 08:23:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2021-12-22 08:23:08,182 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-22 08:23:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:23:09,397 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2021-12-22 08:23:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-22 08:23:09,398 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) Word has length 111 [2021-12-22 08:23:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:23:09,398 INFO L225 Difference]: With dead ends: 166 [2021-12-22 08:23:09,398 INFO L226 Difference]: Without dead ends: 164 [2021-12-22 08:23:09,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 217 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=457, Invalid=4945, Unknown=0, NotChecked=0, Total=5402 [2021-12-22 08:23:09,399 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 158 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 08:23:09,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1003 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 08:23:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-22 08:23:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 117. [2021-12-22 08:23:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 08:23:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2021-12-22 08:23:09,414 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 111 [2021-12-22 08:23:09,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:23:09,414 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2021-12-22 08:23:09,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-22 08:23:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2021-12-22 08:23:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-22 08:23:09,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:23:09,415 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:23:09,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-22 08:23:09,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-22 08:23:09,627 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:23:09,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:23:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1057448942, now seen corresponding path program 24 times [2021-12-22 08:23:09,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:23:09,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215814038] [2021-12-22 08:23:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:23:09,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:23:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:23:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:23:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:23:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:23:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:23:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:23:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:23:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:23:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:23:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 08:23:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 08:23:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 255 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-22 08:23:09,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:23:09,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215814038] [2021-12-22 08:23:09,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215814038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:23:09,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170410901] [2021-12-22 08:23:09,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 08:23:09,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:23:09,937 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:23:09,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-22 08:23:10,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-22 08:23:10,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:23:10,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-22 08:23:10,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:23:10,476 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 08:23:10,557 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:23:10,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:23:10,651 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:23:10,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:23:10,856 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 23 treesize of output 7 [2021-12-22 08:23:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 87 proven. 252 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-22 08:23:10,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:23:11,087 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 19 [2021-12-22 08:23:11,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:23:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 254 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-22 08:23:11,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170410901] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:23:11,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:23:11,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2021-12-22 08:23:11,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745501448] [2021-12-22 08:23:11,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:23:11,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-22 08:23:11,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:23:11,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-22 08:23:11,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2021-12-22 08:23:11,340 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) [2021-12-22 08:23:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:23:12,095 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2021-12-22 08:23:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 08:23:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) Word has length 115 [2021-12-22 08:23:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:23:12,096 INFO L225 Difference]: With dead ends: 153 [2021-12-22 08:23:12,096 INFO L226 Difference]: Without dead ends: 151 [2021-12-22 08:23:12,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 220 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=3360, Unknown=0, NotChecked=0, Total=3660 [2021-12-22 08:23:12,097 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 70 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:23:12,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 855 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1595 Invalid, 0 Unknown, 57 Unchecked, 0.5s Time] [2021-12-22 08:23:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-22 08:23:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2021-12-22 08:23:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 08:23:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2021-12-22 08:23:12,111 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 115 [2021-12-22 08:23:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:23:12,112 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2021-12-22 08:23:12,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) [2021-12-22 08:23:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2021-12-22 08:23:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-22 08:23:12,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:23:12,112 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:23:12,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-22 08:23:12,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-22 08:23:12,330 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:23:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:23:12,330 INFO L85 PathProgramCache]: Analyzing trace with hash -707976937, now seen corresponding path program 25 times [2021-12-22 08:23:12,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:23:12,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147276713] [2021-12-22 08:23:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:23:12,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:23:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:23:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:23:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:23:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:23:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:23:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:23:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:23:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:23:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:23:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 08:23:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-22 08:23:12,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:23:12,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147276713] [2021-12-22 08:23:12,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147276713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:23:12,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308708257] [2021-12-22 08:23:12,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 08:23:12,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:12,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:23:12,628 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:23:12,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-22 08:23:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:12,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 08:23:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:23:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-22 08:23:13,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:23:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-22 08:23:13,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308708257] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:23:13,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:23:13,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-12-22 08:23:13,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017757851] [2021-12-22 08:23:13,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:23:13,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 08:23:13,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:23:13,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 08:23:13,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-12-22 08:23:13,159 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-22 08:23:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:23:13,355 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2021-12-22 08:23:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 08:23:13,356 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 115 [2021-12-22 08:23:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:23:13,356 INFO L225 Difference]: With dead ends: 169 [2021-12-22 08:23:13,356 INFO L226 Difference]: Without dead ends: 129 [2021-12-22 08:23:13,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-12-22 08:23:13,358 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 173 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:23:13,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 189 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:23:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-22 08:23:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 112. [2021-12-22 08:23:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 08:23:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2021-12-22 08:23:13,373 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 115 [2021-12-22 08:23:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:23:13,373 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2021-12-22 08:23:13,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-22 08:23:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2021-12-22 08:23:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-22 08:23:13,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:23:13,374 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:23:13,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-22 08:23:13,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:13,589 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:23:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:23:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash -325453340, now seen corresponding path program 26 times [2021-12-22 08:23:13,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:23:13,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051305601] [2021-12-22 08:23:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:23:13,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:23:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:23:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:23:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:23:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:23:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:23:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:23:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:23:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:23:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:23:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 08:23:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 08:23:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-22 08:23:13,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:23:13,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051305601] [2021-12-22 08:23:13,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051305601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:23:13,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744545060] [2021-12-22 08:23:13,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:23:13,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:13,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:23:13,915 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:23:13,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-22 08:23:14,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:23:14,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:23:14,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-22 08:23:14,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:23:14,411 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 08:23:16,573 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-22 08:23:16,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-22 08:23:16,828 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 23 treesize of output 7 [2021-12-22 08:23:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 61 proven. 278 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-22 08:23:16,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:23:17,007 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 19 [2021-12-22 08:23:17,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 [2021-12-22 08:23:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-22 08:23:17,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744545060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:23:17,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:23:17,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 48 [2021-12-22 08:23:17,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588098122] [2021-12-22 08:23:17,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:23:17,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-22 08:23:17,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:23:17,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-22 08:23:17,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2080, Unknown=1, NotChecked=0, Total=2256 [2021-12-22 08:23:17,279 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2021-12-22 08:23:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:23:17,886 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2021-12-22 08:23:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-22 08:23:17,886 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 119 [2021-12-22 08:23:17,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:23:17,887 INFO L225 Difference]: With dead ends: 156 [2021-12-22 08:23:17,887 INFO L226 Difference]: Without dead ends: 154 [2021-12-22 08:23:17,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 235 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=279, Invalid=3380, Unknown=1, NotChecked=0, Total=3660 [2021-12-22 08:23:17,888 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 76 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 08:23:17,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 874 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1202 Invalid, 0 Unknown, 82 Unchecked, 0.4s Time] [2021-12-22 08:23:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-22 08:23:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2021-12-22 08:23:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-22 08:23:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2021-12-22 08:23:17,905 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 119 [2021-12-22 08:23:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:23:17,905 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2021-12-22 08:23:17,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2021-12-22 08:23:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2021-12-22 08:23:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-22 08:23:17,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:23:17,906 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:23:17,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-22 08:23:18,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:18,124 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:23:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:23:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1033591590, now seen corresponding path program 27 times [2021-12-22 08:23:18,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:23:18,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558061020] [2021-12-22 08:23:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:23:18,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:23:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:23:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:23:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:23:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:23:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:23:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:23:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:23:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:23:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:23:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 08:23:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 08:23:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 30 proven. 305 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-22 08:23:18,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:23:18,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558061020] [2021-12-22 08:23:18,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558061020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:23:18,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645786656] [2021-12-22 08:23:18,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:23:18,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:18,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:23:18,457 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:23:18,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-22 08:23:18,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-22 08:23:18,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:23:18,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-22 08:23:18,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:23:19,157 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 08:23:19,789 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-22 08:23:19,789 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2021-12-22 08:23:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 150 proven. 185 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-22 08:23:19,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:23:20,536 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 20 treesize of output 18 [2021-12-22 08:23:20,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 42 treesize of output 36 [2021-12-22 08:23:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 142 proven. 193 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-22 08:23:21,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645786656] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:23:21,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:23:21,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 74 [2021-12-22 08:23:21,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443829640] [2021-12-22 08:23:21,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:23:21,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-22 08:23:21,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:23:21,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-22 08:23:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=4824, Unknown=0, NotChecked=0, Total=5402 [2021-12-22 08:23:21,221 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 74 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 69 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2021-12-22 08:23:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:23:23,025 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2021-12-22 08:23:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-22 08:23:23,026 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 69 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) Word has length 123 [2021-12-22 08:23:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:23:23,030 INFO L225 Difference]: With dead ends: 160 [2021-12-22 08:23:23,030 INFO L226 Difference]: Without dead ends: 120 [2021-12-22 08:23:23,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3985 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1511, Invalid=13251, Unknown=0, NotChecked=0, Total=14762 [2021-12-22 08:23:23,040 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 85 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:23:23,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 813 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 730 Invalid, 0 Unknown, 209 Unchecked, 0.3s Time] [2021-12-22 08:23:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-22 08:23:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-22 08:23:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-22 08:23:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2021-12-22 08:23:23,056 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 123 [2021-12-22 08:23:23,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:23:23,056 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2021-12-22 08:23:23,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 69 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2021-12-22 08:23:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2021-12-22 08:23:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-22 08:23:23,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:23:23,057 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:23:23,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-22 08:23:23,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-22 08:23:23,263 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:23:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:23:23,264 INFO L85 PathProgramCache]: Analyzing trace with hash -160177113, now seen corresponding path program 28 times [2021-12-22 08:23:23,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:23:23,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956101482] [2021-12-22 08:23:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:23:23,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:23:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:23:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 08:23:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:23:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:23:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:23:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:23:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:23:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 08:23:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 08:23:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 08:23:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 08:23:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 08:23:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:23:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 27 proven. 321 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-12-22 08:23:23,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:23:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956101482] [2021-12-22 08:23:23,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956101482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:23:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506980836] [2021-12-22 08:23:23,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:23:23,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:23:23,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:23:23,608 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:23:23,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-22 08:23:23,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:23:23,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:23:23,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-22 08:23:23,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:23:24,128 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 08:23:24,209 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:23:24,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 08:23:24,314 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-22 08:23:24,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24