./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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_min_and_copy_shift_sum_add.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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 10:18:17,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 10:18:17,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 10:18:17,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 10:18:17,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 10:18:17,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 10:18:17,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 10:18:17,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 10:18:17,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 10:18:17,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 10:18:17,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 10:18:17,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 10:18:17,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 10:18:17,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 10:18:17,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 10:18:17,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 10:18:17,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 10:18:17,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 10:18:17,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 10:18:17,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 10:18:17,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 10:18:17,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 10:18:17,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 10:18:17,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 10:18:17,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 10:18:17,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 10:18:17,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 10:18:17,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 10:18:17,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 10:18:17,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 10:18:17,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 10:18:17,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 10:18:17,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 10:18:17,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 10:18:17,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 10:18:17,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 10:18:17,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 10:18:17,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 10:18:17,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 10:18:17,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 10:18:17,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 10:18:17,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 10:18:17,380 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 10:18:17,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 10:18:17,385 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 10:18:17,385 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 10:18:17,386 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 10:18:17,386 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 10:18:17,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 10:18:17,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 10:18:17,387 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 10:18:17,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 10:18:17,388 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 10:18:17,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 10:18:17,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 10:18:17,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 10:18:17,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 10:18:17,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 10:18:17,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 10:18:17,389 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 10:18:17,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 10:18:17,389 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 10:18:17,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 10:18:17,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 10:18:17,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 10:18:17,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 10:18:17,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:18:17,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 10:18:17,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 10:18:17,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 10:18:17,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 10:18:17,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 10:18:17,391 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 10:18:17,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 10:18:17,391 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 10:18:17,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 10:18:17,392 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 10:18:17,392 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2023-02-14 10:18:17,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 10:18:17,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 10:18:17,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 10:18:17,629 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 10:18:17,629 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 10:18:17,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-02-14 10:18:18,656 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 10:18:18,820 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 10:18:18,821 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-02-14 10:18:18,825 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f940194b/3792ed60c74f4720b7b2e35af9008ee8/FLAG81c965fcc [2023-02-14 10:18:18,839 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f940194b/3792ed60c74f4720b7b2e35af9008ee8 [2023-02-14 10:18:18,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 10:18:18,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 10:18:18,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 10:18:18,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 10:18:18,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 10:18:18,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:18:18" (1/1) ... [2023-02-14 10:18:18,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216f203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:18, skipping insertion in model container [2023-02-14 10:18:18,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:18:18" (1/1) ... [2023-02-14 10:18:18,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 10:18:18,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 10:18:19,004 WARN L237 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_min_and_copy_shift_sum_add.c[423,436] [2023-02-14 10:18:19,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:18:19,034 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 10:18:19,042 WARN L237 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_min_and_copy_shift_sum_add.c[423,436] [2023-02-14 10:18:19,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:18:19,062 INFO L208 MainTranslator]: Completed translation [2023-02-14 10:18:19,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19 WrapperNode [2023-02-14 10:18:19,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 10:18:19,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 10:18:19,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 10:18:19,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 10:18:19,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (1/1) ... [2023-02-14 10:18:19,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (1/1) ... [2023-02-14 10:18:19,091 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-02-14 10:18:19,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 10:18:19,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 10:18:19,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 10:18:19,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 10:18:19,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (1/1) ... [2023-02-14 10:18:19,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (1/1) ... [2023-02-14 10:18:19,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (1/1) ... [2023-02-14 10:18:19,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (1/1) ... [2023-02-14 10:18:19,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (1/1) ... [2023-02-14 10:18:19,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (1/1) ... [2023-02-14 10:18:19,125 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (1/1) ... [2023-02-14 10:18:19,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (1/1) ... [2023-02-14 10:18:19,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 10:18:19,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 10:18:19,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 10:18:19,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 10:18:19,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (1/1) ... [2023-02-14 10:18:19,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:18:19,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:19,155 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) [2023-02-14 10:18:19,159 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 [2023-02-14 10:18:19,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 10:18:19,181 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 10:18:19,182 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 10:18:19,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 10:18:19,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 10:18:19,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 10:18:19,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 10:18:19,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 10:18:19,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 10:18:19,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 10:18:19,226 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 10:18:19,228 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 10:18:19,350 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 10:18:19,354 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 10:18:19,355 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 10:18:19,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:18:19 BoogieIcfgContainer [2023-02-14 10:18:19,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 10:18:19,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 10:18:19,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 10:18:19,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 10:18:19,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:18:18" (1/3) ... [2023-02-14 10:18:19,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2a29e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:18:19, skipping insertion in model container [2023-02-14 10:18:19,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:18:19" (2/3) ... [2023-02-14 10:18:19,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2a29e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:18:19, skipping insertion in model container [2023-02-14 10:18:19,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:18:19" (3/3) ... [2023-02-14 10:18:19,363 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2023-02-14 10:18:19,396 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 10:18:19,396 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 10:18:19,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 10:18:19,457 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1342dde3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 10:18:19,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 10:18:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 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) [2023-02-14 10:18:19,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 10:18:19,468 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:19,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:19,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2023-02-14 10:18:19,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:19,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368320043] [2023-02-14 10:18:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:19,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:19,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:19,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:18:19,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:19,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368320043] [2023-02-14 10:18:19,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368320043] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:18:19,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:18:19,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:18:19,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831399909] [2023-02-14 10:18:19,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:18:19,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:18:19,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:18:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:18:19,785 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 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 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:18:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:19,824 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2023-02-14 10:18:19,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 10:18:19,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-14 10:18:19,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:19,831 INFO L225 Difference]: With dead ends: 64 [2023-02-14 10:18:19,831 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 10:18:19,833 INFO L412 NwaCegarLoop]: 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 [2023-02-14 10:18:19,836 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:19,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:18:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 10:18:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-14 10:18:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2023-02-14 10:18:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-14 10:18:19,860 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2023-02-14 10:18:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:19,861 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-14 10:18:19,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:18:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-14 10:18:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 10:18:19,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:19,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:19,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 10:18:19,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:19,865 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2023-02-14 10:18:19,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:19,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504577983] [2023-02-14 10:18:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:19,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:19,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:19,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:18:19,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:19,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504577983] [2023-02-14 10:18:19,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504577983] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:18:19,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:18:19,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 10:18:19,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171058181] [2023-02-14 10:18:19,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:18:19,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 10:18:19,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:19,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 10:18:19,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:18:19,992 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-02-14 10:18:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:20,054 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2023-02-14 10:18:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:18:20,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 24 [2023-02-14 10:18:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:20,056 INFO L225 Difference]: With dead ends: 50 [2023-02-14 10:18:20,056 INFO L226 Difference]: Without dead ends: 36 [2023-02-14 10:18:20,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:18:20,059 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:20,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:18:20,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-14 10:18:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2023-02-14 10:18:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2023-02-14 10:18:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-02-14 10:18:20,069 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2023-02-14 10:18:20,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:20,072 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-14 10:18:20,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-02-14 10:18:20,072 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-02-14 10:18:20,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 10:18:20,073 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:20,074 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:20,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 10:18:20,074 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2023-02-14 10:18:20,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:20,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518090892] [2023-02-14 10:18:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:20,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:20,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:20,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:20,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:18:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:18:20,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:20,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518090892] [2023-02-14 10:18:20,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518090892] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:20,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402517240] [2023-02-14 10:18:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:20,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:20,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:20,718 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) [2023-02-14 10:18:20,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 10:18:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 10:18:20,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:21,006 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-02-14 10:18:21,057 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2023-02-14 10:18:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:18:21,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:25,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:18:25,190 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 17 [2023-02-14 10:18:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:18:25,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402517240] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:18:25,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:18:25,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-02-14 10:18:25,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026121536] [2023-02-14 10:18:25,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:25,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 10:18:25,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:25,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 10:18:25,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=329, Unknown=2, NotChecked=0, Total=420 [2023-02-14 10:18:25,228 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:18:25,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:25,411 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-02-14 10:18:25,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 10:18:25,412 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-02-14 10:18:25,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:25,412 INFO L225 Difference]: With dead ends: 54 [2023-02-14 10:18:25,413 INFO L226 Difference]: Without dead ends: 50 [2023-02-14 10:18:25,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=118, Invalid=432, Unknown=2, NotChecked=0, Total=552 [2023-02-14 10:18:25,414 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:25,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 159 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:18:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-14 10:18:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-02-14 10:18:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 10:18:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-14 10:18:25,420 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2023-02-14 10:18:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:25,420 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-14 10:18:25,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:18:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-14 10:18:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 10:18:25,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:25,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:25,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 10:18:25,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:25,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:25,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:25,629 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2023-02-14 10:18:25,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:25,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350688394] [2023-02-14 10:18:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:25,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:25,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:25,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:25,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:18:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:18:25,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:25,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350688394] [2023-02-14 10:18:25,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350688394] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:25,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654426830] [2023-02-14 10:18:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:25,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:25,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:25,984 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) [2023-02-14 10:18:25,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 10:18:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:26,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 10:18:26,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:26,130 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-02-14 10:18:26,169 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2023-02-14 10:18:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:18:26,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:26,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:18:26,265 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 17 [2023-02-14 10:18:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:18:26,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654426830] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:18:26,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:18:26,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2023-02-14 10:18:26,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002539323] [2023-02-14 10:18:26,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:26,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 10:18:26,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:26,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 10:18:26,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-02-14 10:18:26,294 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:18:26,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:26,493 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2023-02-14 10:18:26,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 10:18:26,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-02-14 10:18:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:26,495 INFO L225 Difference]: With dead ends: 68 [2023-02-14 10:18:26,496 INFO L226 Difference]: Without dead ends: 64 [2023-02-14 10:18:26,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-02-14 10:18:26,497 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:26,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 208 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:18:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-14 10:18:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2023-02-14 10:18:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 10:18:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-14 10:18:26,503 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2023-02-14 10:18:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:26,503 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-14 10:18:26,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:18:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-14 10:18:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 10:18:26,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:26,504 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:26,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 10:18:26,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-14 10:18:26,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:26,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2023-02-14 10:18:26,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:26,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366048704] [2023-02-14 10:18:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:26,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:26,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:26,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:26,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:18:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 10:18:26,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:26,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366048704] [2023-02-14 10:18:26,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366048704] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:26,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637020265] [2023-02-14 10:18:26,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:18:26,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:26,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:26,803 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) [2023-02-14 10:18:26,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 10:18:26,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:18:26,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:18:26,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 10:18:26,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 10:18:26,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 10:18:26,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637020265] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:18:26,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:18:26,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-14 10:18:26,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039679653] [2023-02-14 10:18:26,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:26,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 10:18:26,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 10:18:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-14 10:18:26,919 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 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) [2023-02-14 10:18:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:27,011 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2023-02-14 10:18:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 10:18:27,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 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 38 [2023-02-14 10:18:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:27,016 INFO L225 Difference]: With dead ends: 88 [2023-02-14 10:18:27,016 INFO L226 Difference]: Without dead ends: 69 [2023-02-14 10:18:27,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-14 10:18:27,018 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:27,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 83 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:18:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-14 10:18:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2023-02-14 10:18:27,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 10:18:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-14 10:18:27,033 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2023-02-14 10:18:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:27,033 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-14 10:18:27,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 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) [2023-02-14 10:18:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-14 10:18:27,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 10:18:27,037 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:27,038 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:27,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 10:18:27,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:27,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:27,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2023-02-14 10:18:27,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:27,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663139113] [2023-02-14 10:18:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:27,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:27,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:27,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:27,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:18:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:27,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:18:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 10:18:27,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:27,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663139113] [2023-02-14 10:18:27,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663139113] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:27,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770384293] [2023-02-14 10:18:27,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:18:27,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:27,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:27,335 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) [2023-02-14 10:18:27,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 10:18:27,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 10:18:27,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:18:27,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 10:18:27,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 10:18:27,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 10:18:27,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770384293] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:18:27,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:18:27,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-14 10:18:27,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678582907] [2023-02-14 10:18:27,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:27,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 10:18:27,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:27,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 10:18:27,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-14 10:18:27,481 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 10:18:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:27,603 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2023-02-14 10:18:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 10:18:27,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2023-02-14 10:18:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:27,606 INFO L225 Difference]: With dead ends: 59 [2023-02-14 10:18:27,606 INFO L226 Difference]: Without dead ends: 51 [2023-02-14 10:18:27,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-14 10:18:27,608 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:27,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 140 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:18:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-14 10:18:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2023-02-14 10:18:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 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) [2023-02-14 10:18:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-02-14 10:18:27,617 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2023-02-14 10:18:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:27,618 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-02-14 10:18:27,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 10:18:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-02-14 10:18:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 10:18:27,618 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:27,618 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:27,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 10:18:27,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:27,823 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2023-02-14 10:18:27,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:27,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933958619] [2023-02-14 10:18:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:27,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:28,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:28,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:28,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:18:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:28,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:18:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 10:18:28,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:28,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933958619] [2023-02-14 10:18:28,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933958619] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:28,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753335512] [2023-02-14 10:18:28,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 10:18:28,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:28,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:28,692 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) [2023-02-14 10:18:28,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 10:18:28,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 10:18:28,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:18:28,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-14 10:18:28,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:28,764 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:18:29,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:29,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:29,147 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:18:29,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2023-02-14 10:18:29,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:29,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2023-02-14 10:18:29,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2023-02-14 10:18:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 10:18:29,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:30,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753335512] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:30,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:18:30,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2023-02-14 10:18:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579184812] [2023-02-14 10:18:30,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:30,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-14 10:18:30,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-14 10:18:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2023-02-14 10:18:30,475 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 10:18:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:33,111 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2023-02-14 10:18:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-14 10:18:33,112 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-14 10:18:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:33,113 INFO L225 Difference]: With dead ends: 96 [2023-02-14 10:18:33,113 INFO L226 Difference]: Without dead ends: 92 [2023-02-14 10:18:33,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=841, Invalid=5479, Unknown=0, NotChecked=0, Total=6320 [2023-02-14 10:18:33,115 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:33,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 335 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 10:18:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-14 10:18:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2023-02-14 10:18:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:18:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2023-02-14 10:18:33,121 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 50 [2023-02-14 10:18:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:33,121 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2023-02-14 10:18:33,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 10:18:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2023-02-14 10:18:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 10:18:33,132 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:33,132 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:33,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 10:18:33,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:33,341 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:33,342 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2023-02-14 10:18:33,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:33,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954281311] [2023-02-14 10:18:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:33,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:34,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:34,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:34,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:18:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:34,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:18:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 10:18:34,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:34,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954281311] [2023-02-14 10:18:34,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954281311] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:34,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114529566] [2023-02-14 10:18:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:34,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:34,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:34,228 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) [2023-02-14 10:18:34,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 10:18:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:34,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-14 10:18:34,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:34,288 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:18:34,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:34,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:34,566 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:18:34,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2023-02-14 10:18:34,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:34,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-02-14 10:18:34,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-02-14 10:18:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 10:18:34,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114529566] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:37,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:18:37,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2023-02-14 10:18:37,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218371336] [2023-02-14 10:18:37,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:37,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-14 10:18:37,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-14 10:18:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1943, Unknown=1, NotChecked=0, Total=2162 [2023-02-14 10:18:37,510 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 10:18:40,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:18:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:41,067 INFO L93 Difference]: Finished difference Result 100 states and 125 transitions. [2023-02-14 10:18:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 10:18:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-14 10:18:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:41,068 INFO L225 Difference]: With dead ends: 100 [2023-02-14 10:18:41,068 INFO L226 Difference]: Without dead ends: 94 [2023-02-14 10:18:41,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=583, Invalid=3972, Unknown=1, NotChecked=0, Total=4556 [2023-02-14 10:18:41,070 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:41,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 290 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 896 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-02-14 10:18:41,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-14 10:18:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2023-02-14 10:18:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 65 states have internal predecessors, (83), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 10:18:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2023-02-14 10:18:41,079 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 50 [2023-02-14 10:18:41,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:41,080 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2023-02-14 10:18:41,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 10:18:41,080 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2023-02-14 10:18:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 10:18:41,080 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:41,080 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:41,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 10:18:41,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:41,286 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:41,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:41,286 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2023-02-14 10:18:41,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:41,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790042139] [2023-02-14 10:18:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:41,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:42,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:42,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:42,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:18:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:42,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:18:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 10:18:42,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:42,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790042139] [2023-02-14 10:18:42,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790042139] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:42,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469780888] [2023-02-14 10:18:42,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:18:42,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:42,179 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) [2023-02-14 10:18:42,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 10:18:42,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:18:42,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:18:42,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-14 10:18:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:42,322 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:18:42,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,901 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:18:42,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2023-02-14 10:18:43,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2023-02-14 10:18:43,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2023-02-14 10:18:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 10:18:43,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:44,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469780888] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:44,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:18:44,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2023-02-14 10:18:44,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121345105] [2023-02-14 10:18:44,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:44,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-14 10:18:44,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:44,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-14 10:18:44,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2698, Unknown=0, NotChecked=0, Total=2970 [2023-02-14 10:18:44,070 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 10:18:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:46,192 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2023-02-14 10:18:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 10:18:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-14 10:18:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:46,194 INFO L225 Difference]: With dead ends: 135 [2023-02-14 10:18:46,194 INFO L226 Difference]: Without dead ends: 131 [2023-02-14 10:18:46,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=813, Invalid=5829, Unknown=0, NotChecked=0, Total=6642 [2023-02-14 10:18:46,195 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 139 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:46,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 200 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 10:18:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-14 10:18:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2023-02-14 10:18:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 68 states have internal predecessors, (88), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:18:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2023-02-14 10:18:46,205 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 50 [2023-02-14 10:18:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:46,205 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2023-02-14 10:18:46,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 10:18:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2023-02-14 10:18:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 10:18:46,205 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:46,205 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:46,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 10:18:46,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:46,406 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:46,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:46,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2023-02-14 10:18:46,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:46,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462821494] [2023-02-14 10:18:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:46,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:47,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:47,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:47,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:18:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:47,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:18:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 10:18:47,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462821494] [2023-02-14 10:18:47,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462821494] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586576355] [2023-02-14 10:18:47,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:18:47,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:47,231 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) [2023-02-14 10:18:47,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 10:18:47,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:18:47,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:18:47,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-14 10:18:47,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:47,294 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:18:47,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:47,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:47,587 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:18:47,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2023-02-14 10:18:47,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:47,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-02-14 10:18:47,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-02-14 10:18:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 10:18:47,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:48,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586576355] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:48,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:18:48,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2023-02-14 10:18:48,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873850189] [2023-02-14 10:18:48,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:48,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-14 10:18:48,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:48,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-14 10:18:48,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 10:18:48,281 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 10:18:51,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:18:54,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:18:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:54,293 INFO L93 Difference]: Finished difference Result 163 states and 209 transitions. [2023-02-14 10:18:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-14 10:18:54,293 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-14 10:18:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:54,294 INFO L225 Difference]: With dead ends: 163 [2023-02-14 10:18:54,296 INFO L226 Difference]: Without dead ends: 157 [2023-02-14 10:18:54,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=794, Invalid=5526, Unknown=0, NotChecked=0, Total=6320 [2023-02-14 10:18:54,298 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 79 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 115 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:54,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 337 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1232 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2023-02-14 10:18:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-14 10:18:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 90. [2023-02-14 10:18:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 states have internal predecessors, (103), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:18:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2023-02-14 10:18:54,320 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 50 [2023-02-14 10:18:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:54,321 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2023-02-14 10:18:54,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 10:18:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2023-02-14 10:18:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 10:18:54,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:54,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:54,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 10:18:54,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 10:18:54,528 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2023-02-14 10:18:54,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:54,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176654774] [2023-02-14 10:18:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:54,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:54,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:54,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:54,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:18:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:54,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:18:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 10:18:54,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:54,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176654774] [2023-02-14 10:18:54,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176654774] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:54,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719070688] [2023-02-14 10:18:54,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 10:18:54,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:54,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:54,626 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) [2023-02-14 10:18:54,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 10:18:54,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-14 10:18:54,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:18:54,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 10:18:54,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 10:18:54,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 10:18:54,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719070688] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:18:54,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:18:54,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-14 10:18:54,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501785077] [2023-02-14 10:18:54,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:54,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 10:18:54,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:54,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 10:18:54,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-14 10:18:54,838 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 10:18:54,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:54,953 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2023-02-14 10:18:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 10:18:54,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2023-02-14 10:18:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:54,954 INFO L225 Difference]: With dead ends: 176 [2023-02-14 10:18:54,954 INFO L226 Difference]: Without dead ends: 138 [2023-02-14 10:18:54,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-14 10:18:54,955 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:54,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 87 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:18:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-14 10:18:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 106. [2023-02-14 10:18:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:18:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 136 transitions. [2023-02-14 10:18:54,970 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 136 transitions. Word has length 52 [2023-02-14 10:18:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:54,970 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 136 transitions. [2023-02-14 10:18:54,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 10:18:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 136 transitions. [2023-02-14 10:18:54,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-14 10:18:54,972 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:54,972 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:54,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 10:18:55,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:55,177 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2023-02-14 10:18:55,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:55,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760186064] [2023-02-14 10:18:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:55,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:55,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:55,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:55,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:18:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:55,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:18:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:55,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:18:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-14 10:18:55,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:55,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760186064] [2023-02-14 10:18:55,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760186064] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:55,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100234037] [2023-02-14 10:18:55,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 10:18:55,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:55,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:55,265 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) [2023-02-14 10:18:55,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 10:18:55,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-14 10:18:55,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:18:55,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 10:18:55,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-14 10:18:55,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-14 10:18:55,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100234037] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:18:55,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:18:55,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-14 10:18:55,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706930768] [2023-02-14 10:18:55,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:55,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 10:18:55,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 10:18:55,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-14 10:18:55,467 INFO L87 Difference]: Start difference. First operand 106 states and 136 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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) [2023-02-14 10:18:55,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:55,591 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2023-02-14 10:18:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 10:18:55,592 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 60 [2023-02-14 10:18:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:55,593 INFO L225 Difference]: With dead ends: 118 [2023-02-14 10:18:55,593 INFO L226 Difference]: Without dead ends: 108 [2023-02-14 10:18:55,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-14 10:18:55,594 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:55,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 127 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:18:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-14 10:18:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 49. [2023-02-14 10:18:55,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 10:18:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-02-14 10:18:55,606 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2023-02-14 10:18:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:55,606 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-02-14 10:18:55,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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) [2023-02-14 10:18:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-02-14 10:18:55,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-14 10:18:55,608 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:55,608 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:18:55,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 10:18:55,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 10:18:55,813 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:55,813 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2023-02-14 10:18:55,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:55,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601025899] [2023-02-14 10:18:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:55,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:57,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:18:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:57,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:18:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:57,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:18:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:57,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:18:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:57,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:18:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:18:57,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:57,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601025899] [2023-02-14 10:18:57,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601025899] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:57,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204462361] [2023-02-14 10:18:57,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 10:18:57,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:57,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:57,401 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) [2023-02-14 10:18:57,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 10:18:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:57,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-14 10:18:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:57,469 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:18:58,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:58,140 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:18:58,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2023-02-14 10:18:58,286 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:18:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:58,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 79 [2023-02-14 10:18:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:58,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2023-02-14 10:18:58,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-02-14 10:18:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 10:18:58,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:00,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204462361] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:00,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:19:00,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2023-02-14 10:19:00,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359861801] [2023-02-14 10:19:00,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:00,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-14 10:19:00,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:00,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-14 10:19:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=3972, Unknown=0, NotChecked=0, Total=4290 [2023-02-14 10:19:00,614 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:19:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:06,400 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2023-02-14 10:19:06,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-14 10:19:06,402 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-14 10:19:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:06,404 INFO L225 Difference]: With dead ends: 164 [2023-02-14 10:19:06,404 INFO L226 Difference]: Without dead ends: 158 [2023-02-14 10:19:06,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4822 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1557, Invalid=14955, Unknown=0, NotChecked=0, Total=16512 [2023-02-14 10:19:06,410 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 205 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:06,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 485 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 10:19:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-14 10:19:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 114. [2023-02-14 10:19:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 99 states have (on average 1.303030303030303) internal successors, (129), 99 states have internal predecessors, (129), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 10:19:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2023-02-14 10:19:06,450 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 64 [2023-02-14 10:19:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:06,451 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2023-02-14 10:19:06,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:19:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2023-02-14 10:19:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-14 10:19:06,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:06,452 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:19:06,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-14 10:19:06,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 10:19:06,657 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:06,658 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2023-02-14 10:19:06,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:06,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918226812] [2023-02-14 10:19:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:06,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:07,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:19:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:07,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:19:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:07,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:19:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:07,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:19:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:07,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:19:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:19:07,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:07,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918226812] [2023-02-14 10:19:07,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918226812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:07,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659545756] [2023-02-14 10:19:07,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:19:07,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:07,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:07,955 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) [2023-02-14 10:19:07,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 10:19:08,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 10:19:08,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:19:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-14 10:19:08,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:08,067 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:19:08,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:08,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:08,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:08,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:08,868 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:08,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 59 [2023-02-14 10:19:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:09,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:09,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:09,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2023-02-14 10:19:09,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:09,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:09,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:09,188 INFO L321 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2023-02-14 10:19:09,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 127 treesize of output 105 [2023-02-14 10:19:10,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:10,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:10,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:10,229 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:10,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:19:10,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 72 [2023-02-14 10:19:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 10:19:10,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:19,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659545756] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:19,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:19:19,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 56 [2023-02-14 10:19:19,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162540281] [2023-02-14 10:19:19,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:19,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-14 10:19:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-14 10:19:19,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4950, Unknown=2, NotChecked=0, Total=5402 [2023-02-14 10:19:19,683 INFO L87 Difference]: Start difference. First operand 114 states and 153 transitions. Second operand has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:19:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:26,962 INFO L93 Difference]: Finished difference Result 182 states and 232 transitions. [2023-02-14 10:19:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-14 10:19:26,962 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-14 10:19:26,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:26,963 INFO L225 Difference]: With dead ends: 182 [2023-02-14 10:19:26,963 INFO L226 Difference]: Without dead ends: 156 [2023-02-14 10:19:26,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4492 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=1936, Invalid=14574, Unknown=2, NotChecked=0, Total=16512 [2023-02-14 10:19:26,965 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 183 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:26,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 512 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-14 10:19:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-14 10:19:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2023-02-14 10:19:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 101 states have (on average 1.297029702970297) internal successors, (131), 101 states have internal predecessors, (131), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 10:19:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2023-02-14 10:19:26,990 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 64 [2023-02-14 10:19:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:26,990 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2023-02-14 10:19:26,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:19:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2023-02-14 10:19:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-14 10:19:26,991 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:26,991 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:19:27,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 10:19:27,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 10:19:27,201 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash -230931721, now seen corresponding path program 4 times [2023-02-14 10:19:27,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:27,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454198241] [2023-02-14 10:19:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:27,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:28,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:19:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:28,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:19:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:28,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:19:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:28,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:19:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:28,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:19:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:19:28,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:28,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454198241] [2023-02-14 10:19:28,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454198241] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:28,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7369982] [2023-02-14 10:19:28,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 10:19:28,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:28,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:28,450 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) [2023-02-14 10:19:28,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 10:19:28,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 10:19:28,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:19:28,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-14 10:19:28,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:28,541 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:19:29,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:29,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:29,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:29,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:29,267 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:29,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2023-02-14 10:19:29,394 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:29,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:29,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2023-02-14 10:19:29,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:29,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:29,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2023-02-14 10:19:29,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-02-14 10:19:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 10:19:30,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:32,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7369982] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:32,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:19:32,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 52 [2023-02-14 10:19:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205331326] [2023-02-14 10:19:32,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:32,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-14 10:19:32,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-14 10:19:32,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=4109, Unknown=0, NotChecked=0, Total=4556 [2023-02-14 10:19:32,177 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:19:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:36,404 INFO L93 Difference]: Finished difference Result 175 states and 227 transitions. [2023-02-14 10:19:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-14 10:19:36,404 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-14 10:19:36,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:36,405 INFO L225 Difference]: With dead ends: 175 [2023-02-14 10:19:36,405 INFO L226 Difference]: Without dead ends: 148 [2023-02-14 10:19:36,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3305 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1230, Invalid=9482, Unknown=0, NotChecked=0, Total=10712 [2023-02-14 10:19:36,406 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:36,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 481 Invalid, 2280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-14 10:19:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-14 10:19:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 131. [2023-02-14 10:19:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 115 states have internal predecessors, (148), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 10:19:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 174 transitions. [2023-02-14 10:19:36,437 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 174 transitions. Word has length 64 [2023-02-14 10:19:36,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:36,437 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 174 transitions. [2023-02-14 10:19:36,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:19:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 174 transitions. [2023-02-14 10:19:36,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-14 10:19:36,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:36,438 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:19:36,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-14 10:19:36,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 10:19:36,644 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash -12077003, now seen corresponding path program 5 times [2023-02-14 10:19:36,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:36,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289747265] [2023-02-14 10:19:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:36,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:37,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:19:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:37,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:19:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:37,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:19:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:37,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:19:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:37,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:19:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:19:37,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:37,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289747265] [2023-02-14 10:19:37,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289747265] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:37,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12494857] [2023-02-14 10:19:37,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 10:19:37,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:37,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:37,936 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) [2023-02-14 10:19:37,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 10:19:38,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-14 10:19:38,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:19:38,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-14 10:19:38,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:38,036 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2023-02-14 10:19:38,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:38,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:38,658 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:38,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2023-02-14 10:19:38,764 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:38,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:38,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2023-02-14 10:19:38,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:38,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:38,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2023-02-14 10:19:39,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2023-02-14 10:19:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 10:19:39,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:41,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12494857] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:41,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:19:41,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2023-02-14 10:19:41,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435943628] [2023-02-14 10:19:41,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:41,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-14 10:19:41,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:41,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-14 10:19:41,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=3745, Unknown=0, NotChecked=0, Total=4032 [2023-02-14 10:19:41,770 INFO L87 Difference]: Start difference. First operand 131 states and 174 transitions. Second operand has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:19:45,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:19:50,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:19:50,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:50,500 INFO L93 Difference]: Finished difference Result 196 states and 253 transitions. [2023-02-14 10:19:50,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-14 10:19:50,500 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-14 10:19:50,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:50,501 INFO L225 Difference]: With dead ends: 196 [2023-02-14 10:19:50,501 INFO L226 Difference]: Without dead ends: 160 [2023-02-14 10:19:50,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1129, Invalid=10001, Unknown=0, NotChecked=0, Total=11130 [2023-02-14 10:19:50,502 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 117 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 163 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:50,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 438 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2185 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2023-02-14 10:19:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-02-14 10:19:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2023-02-14 10:19:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 123 states have (on average 1.2926829268292683) internal successors, (159), 123 states have internal predecessors, (159), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-14 10:19:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 187 transitions. [2023-02-14 10:19:50,552 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 187 transitions. Word has length 64 [2023-02-14 10:19:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:50,552 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 187 transitions. [2023-02-14 10:19:50,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:19:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 187 transitions. [2023-02-14 10:19:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-14 10:19:50,558 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:50,559 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:19:50,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-14 10:19:50,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:50,764 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:50,764 INFO L85 PathProgramCache]: Analyzing trace with hash -257544841, now seen corresponding path program 6 times [2023-02-14 10:19:50,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:50,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233832533] [2023-02-14 10:19:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:50,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:52,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:19:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:52,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:19:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:52,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:19:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:52,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:19:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:52,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:19:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:19:52,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:52,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233832533] [2023-02-14 10:19:52,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233832533] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:52,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258651819] [2023-02-14 10:19:52,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 10:19:52,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:52,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:52,265 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) [2023-02-14 10:19:52,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 10:19:52,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-14 10:19:52,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:19:52,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-14 10:19:52,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:52,353 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:19:58,561 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:58,566 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2023-02-14 10:19:58,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 64 [2023-02-14 10:19:58,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:58,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:58,753 INFO L321 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2023-02-14 10:19:58,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 83 [2023-02-14 10:19:58,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:58,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:58,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:58,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:58,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:58,952 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-02-14 10:19:58,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 96 [2023-02-14 10:19:59,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:59,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:59,768 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:59,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:59,769 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:59,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:19:59,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 85 [2023-02-14 10:20:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 10:20:00,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:20:04,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258651819] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:20:04,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:20:04,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34] total 60 [2023-02-14 10:20:04,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867959946] [2023-02-14 10:20:04,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:20:04,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-14 10:20:04,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:20:04,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-14 10:20:04,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=5619, Unknown=4, NotChecked=0, Total=6320 [2023-02-14 10:20:04,451 INFO L87 Difference]: Start difference. First operand 140 states and 187 transitions. Second operand has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:20:05,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:20:07,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:20:09,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:20:22,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:20:30,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:20:57,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:21:00,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:21:02,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:21:04,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:21:06,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:21:12,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:21:14,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:21:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:21:29,482 INFO L93 Difference]: Finished difference Result 416 states and 548 transitions. [2023-02-14 10:21:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-02-14 10:21:29,482 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-14 10:21:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:21:29,487 INFO L225 Difference]: With dead ends: 416 [2023-02-14 10:21:29,487 INFO L226 Difference]: Without dead ends: 410 [2023-02-14 10:21:29,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7487 ImplicationChecksByTransitivity, 73.2s TimeCoverageRelationStatistics Valid=2968, Invalid=22769, Unknown=23, NotChecked=0, Total=25760 [2023-02-14 10:21:29,500 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 188 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 167 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:21:29,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 599 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2305 Invalid, 12 Unknown, 0 Unchecked, 23.0s Time] [2023-02-14 10:21:29,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-02-14 10:21:29,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 184. [2023-02-14 10:21:29,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 160 states have (on average 1.34375) internal successors, (215), 160 states have internal predecessors, (215), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-14 10:21:29,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 255 transitions. [2023-02-14 10:21:29,553 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 255 transitions. Word has length 64 [2023-02-14 10:21:29,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:21:29,553 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 255 transitions. [2023-02-14 10:21:29,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:21:29,554 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 255 transitions. [2023-02-14 10:21:29,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-14 10:21:29,554 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:21:29,555 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:21:29,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 10:21:29,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 10:21:29,760 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:21:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:21:29,760 INFO L85 PathProgramCache]: Analyzing trace with hash -38690123, now seen corresponding path program 7 times [2023-02-14 10:21:29,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:21:29,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298181073] [2023-02-14 10:21:29,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:21:29,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:21:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:30,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:21:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:30,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:21:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:30,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:21:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:30,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:21:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:30,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:21:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:21:30,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:21:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298181073] [2023-02-14 10:21:30,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298181073] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:21:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751896802] [2023-02-14 10:21:30,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 10:21:30,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:21:30,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:21:30,924 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) [2023-02-14 10:21:30,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 10:21:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:30,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-14 10:21:31,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:21:31,016 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:21:31,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:31,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:31,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:31,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:31,511 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:21:31,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2023-02-14 10:21:31,617 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:21:31,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:31,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2023-02-14 10:21:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:31,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 75 [2023-02-14 10:21:32,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 39 [2023-02-14 10:21:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 10:21:32,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:21:36,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751896802] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:21:36,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:21:36,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2023-02-14 10:21:36,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240254825] [2023-02-14 10:21:36,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:21:36,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-14 10:21:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:21:36,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-14 10:21:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=4106, Unknown=1, NotChecked=0, Total=4422 [2023-02-14 10:21:36,396 INFO L87 Difference]: Start difference. First operand 184 states and 255 transitions. Second operand has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:21:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:21:41,291 INFO L93 Difference]: Finished difference Result 316 states and 417 transitions. [2023-02-14 10:21:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-14 10:21:41,292 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-14 10:21:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:21:41,296 INFO L225 Difference]: With dead ends: 316 [2023-02-14 10:21:41,296 INFO L226 Difference]: Without dead ends: 284 [2023-02-14 10:21:41,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1287, Invalid=11594, Unknown=1, NotChecked=0, Total=12882 [2023-02-14 10:21:41,302 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 176 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:21:41,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 507 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-14 10:21:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-02-14 10:21:41,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 214. [2023-02-14 10:21:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 186 states have (on average 1.3548387096774193) internal successors, (252), 186 states have internal predecessors, (252), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-14 10:21:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 298 transitions. [2023-02-14 10:21:41,379 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 298 transitions. Word has length 64 [2023-02-14 10:21:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:21:41,379 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 298 transitions. [2023-02-14 10:21:41,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:21:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 298 transitions. [2023-02-14 10:21:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-14 10:21:41,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:21:41,380 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:21:41,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 10:21:41,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 10:21:41,589 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:21:41,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:21:41,590 INFO L85 PathProgramCache]: Analyzing trace with hash 17214773, now seen corresponding path program 8 times [2023-02-14 10:21:41,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:21:41,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783639896] [2023-02-14 10:21:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:21:41,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:21:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:42,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:21:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:42,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:21:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:42,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:21:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:42,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:21:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:42,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:21:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:21:42,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:21:42,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783639896] [2023-02-14 10:21:42,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783639896] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:21:42,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878893147] [2023-02-14 10:21:42,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:21:42,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:21:42,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:21:42,866 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) [2023-02-14 10:21:42,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 10:21:42,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:21:42,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:21:42,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-14 10:21:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:21:43,038 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:21:43,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:43,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:43,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:43,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:43,934 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:21:43,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2023-02-14 10:21:44,065 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:21:44,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:44,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:44,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:44,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2023-02-14 10:21:44,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:44,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:44,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2023-02-14 10:21:44,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-02-14 10:21:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 10:21:44,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:21:46,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878893147] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:21:46,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:21:46,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 57 [2023-02-14 10:21:46,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91889915] [2023-02-14 10:21:46,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:21:46,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-14 10:21:46,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:21:46,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-14 10:21:46,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=4886, Unknown=0, NotChecked=0, Total=5256 [2023-02-14 10:21:46,929 INFO L87 Difference]: Start difference. First operand 214 states and 298 transitions. Second operand has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:21:54,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:21:54,111 INFO L93 Difference]: Finished difference Result 323 states and 424 transitions. [2023-02-14 10:21:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-14 10:21:54,112 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-14 10:21:54,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:21:54,113 INFO L225 Difference]: With dead ends: 323 [2023-02-14 10:21:54,113 INFO L226 Difference]: Without dead ends: 317 [2023-02-14 10:21:54,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1665, Invalid=16695, Unknown=0, NotChecked=0, Total=18360 [2023-02-14 10:21:54,115 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 174 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-14 10:21:54,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 457 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2685 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-14 10:21:54,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-02-14 10:21:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 218. [2023-02-14 10:21:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 189 states have (on average 1.3544973544973544) internal successors, (256), 189 states have internal predecessors, (256), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-14 10:21:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 304 transitions. [2023-02-14 10:21:54,180 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 304 transitions. Word has length 64 [2023-02-14 10:21:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:21:54,180 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 304 transitions. [2023-02-14 10:21:54,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:21:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 304 transitions. [2023-02-14 10:21:54,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-14 10:21:54,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:21:54,182 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:21:54,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-14 10:21:54,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:21:54,383 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:21:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:21:54,384 INFO L85 PathProgramCache]: Analyzing trace with hash 236069491, now seen corresponding path program 3 times [2023-02-14 10:21:54,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:21:54,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826454622] [2023-02-14 10:21:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:21:54,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:21:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:55,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:21:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:55,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:21:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:55,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:21:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:55,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:21:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:55,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:21:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:21:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:21:55,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:21:55,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826454622] [2023-02-14 10:21:55,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826454622] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:21:55,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091755209] [2023-02-14 10:21:55,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:21:55,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:21:55,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:21:55,633 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) [2023-02-14 10:21:55,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 10:21:55,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 10:21:55,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:21:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-14 10:21:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:21:55,737 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:21:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,475 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:21:56,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 57 [2023-02-14 10:21:56,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2023-02-14 10:21:56,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:56,786 INFO L321 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2023-02-14 10:21:56,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 155 treesize of output 113 [2023-02-14 10:21:57,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:57,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:21:57,847 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:21:57,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:21:57,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 80 [2023-02-14 10:21:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 10:21:58,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:22:16,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091755209] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:22:16,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:22:16,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2023-02-14 10:22:16,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616453989] [2023-02-14 10:22:16,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:22:16,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-14 10:22:16,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:22:16,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-14 10:22:16,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=4794, Unknown=4, NotChecked=0, Total=5256 [2023-02-14 10:22:16,004 INFO L87 Difference]: Start difference. First operand 218 states and 304 transitions. Second operand has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:22:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:22:23,832 INFO L93 Difference]: Finished difference Result 280 states and 376 transitions. [2023-02-14 10:22:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-14 10:22:23,833 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-14 10:22:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:22:23,834 INFO L225 Difference]: With dead ends: 280 [2023-02-14 10:22:23,834 INFO L226 Difference]: Without dead ends: 257 [2023-02-14 10:22:23,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4239 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=1726, Invalid=12790, Unknown=4, NotChecked=0, Total=14520 [2023-02-14 10:22:23,836 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 123 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-14 10:22:23,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 362 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-14 10:22:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-02-14 10:22:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 220. [2023-02-14 10:22:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 191 states have (on average 1.350785340314136) internal successors, (258), 191 states have internal predecessors, (258), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-14 10:22:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 306 transitions. [2023-02-14 10:22:23,916 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 306 transitions. Word has length 64 [2023-02-14 10:22:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:22:23,916 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 306 transitions. [2023-02-14 10:22:23,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:22:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 306 transitions. [2023-02-14 10:22:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-14 10:22:23,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:22:23,917 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:22:23,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 10:22:24,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:22:24,122 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:22:24,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:22:24,122 INFO L85 PathProgramCache]: Analyzing trace with hash -584834725, now seen corresponding path program 8 times [2023-02-14 10:22:24,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:22:24,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418682605] [2023-02-14 10:22:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:22:24,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:22:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:24,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:22:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:24,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:22:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:24,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:22:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:24,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:22:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:24,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:22:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-14 10:22:24,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:22:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418682605] [2023-02-14 10:22:24,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418682605] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:22:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548197604] [2023-02-14 10:22:24,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:22:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:22:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:22:24,264 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) [2023-02-14 10:22:24,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 10:22:24,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:22:24,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:22:24,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 10:22:24,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:22:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-14 10:22:24,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:22:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-14 10:22:24,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548197604] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:22:24,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:22:24,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-14 10:22:24,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124938283] [2023-02-14 10:22:24,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:22:24,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 10:22:24,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:22:24,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 10:22:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-14 10:22:24,490 INFO L87 Difference]: Start difference. First operand 220 states and 306 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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) [2023-02-14 10:22:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:22:24,774 INFO L93 Difference]: Finished difference Result 363 states and 479 transitions. [2023-02-14 10:22:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 10:22:24,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 66 [2023-02-14 10:22:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:22:24,776 INFO L225 Difference]: With dead ends: 363 [2023-02-14 10:22:24,776 INFO L226 Difference]: Without dead ends: 297 [2023-02-14 10:22:24,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-02-14 10:22:24,777 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:22:24,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 141 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:22:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-02-14 10:22:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 208. [2023-02-14 10:22:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 181 states have (on average 1.3314917127071824) internal successors, (241), 181 states have internal predecessors, (241), 22 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-14 10:22:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 285 transitions. [2023-02-14 10:22:24,853 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 285 transitions. Word has length 66 [2023-02-14 10:22:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:22:24,853 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 285 transitions. [2023-02-14 10:22:24,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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) [2023-02-14 10:22:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 285 transitions. [2023-02-14 10:22:24,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-14 10:22:24,855 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:22:24,855 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:22:24,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-14 10:22:25,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:22:25,061 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:22:25,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:22:25,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1051375952, now seen corresponding path program 9 times [2023-02-14 10:22:25,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:22:25,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646434700] [2023-02-14 10:22:25,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:22:25,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:22:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:25,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:22:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:25,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:22:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:25,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:22:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:25,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:22:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:25,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:22:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:25,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-14 10:22:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-14 10:22:25,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:22:25,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646434700] [2023-02-14 10:22:25,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646434700] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:22:25,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740481230] [2023-02-14 10:22:25,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:22:25,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:22:25,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:22:25,180 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) [2023-02-14 10:22:25,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 10:22:25,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-14 10:22:25,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:22:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 10:22:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:22:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-14 10:22:25,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:22:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-14 10:22:25,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740481230] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:22:25,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:22:25,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-14 10:22:25,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312231616] [2023-02-14 10:22:25,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:22:25,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 10:22:25,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:22:25,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 10:22:25,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-14 10:22:25,455 INFO L87 Difference]: Start difference. First operand 208 states and 285 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-14 10:22:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:22:25,713 INFO L93 Difference]: Finished difference Result 222 states and 299 transitions. [2023-02-14 10:22:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 10:22:25,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 74 [2023-02-14 10:22:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:22:25,714 INFO L225 Difference]: With dead ends: 222 [2023-02-14 10:22:25,715 INFO L226 Difference]: Without dead ends: 210 [2023-02-14 10:22:25,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-02-14 10:22:25,716 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 67 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:22:25,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 138 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:22:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-14 10:22:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 89. [2023-02-14 10:22:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 76 states have (on average 1.25) internal successors, (95), 76 states have internal predecessors, (95), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:22:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2023-02-14 10:22:25,759 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 74 [2023-02-14 10:22:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:22:25,761 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2023-02-14 10:22:25,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-14 10:22:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2023-02-14 10:22:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-14 10:22:25,763 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:22:25,763 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:22:25,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-14 10:22:25,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-14 10:22:25,969 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:22:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:22:25,970 INFO L85 PathProgramCache]: Analyzing trace with hash -517304264, now seen corresponding path program 9 times [2023-02-14 10:22:25,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:22:25,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285038384] [2023-02-14 10:22:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:22:25,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:22:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:28,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:22:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:28,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 10:22:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:28,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:22:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:28,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:22:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:28,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 10:22:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:28,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-14 10:22:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:22:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 10:22:28,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:22:28,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285038384] [2023-02-14 10:22:28,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285038384] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:22:28,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515211685] [2023-02-14 10:22:28,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:22:28,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:22:28,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:22:28,212 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) [2023-02-14 10:22:28,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 10:22:28,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-14 10:22:28,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:22:28,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-14 10:22:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:22:28,313 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8