./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_m2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-crafted/zero_sum_m2.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 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:10:58,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:10:58,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:10:58,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:10:58,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:10:58,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:10:58,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:10:58,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:10:58,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:10:58,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:10:58,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:10:58,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:10:58,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:10:58,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:10:58,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:10:58,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:10:58,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:10:58,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:10:58,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:10:58,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:10:58,980 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:10:58,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:10:58,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:10:58,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:10:58,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:10:58,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:10:58,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:10:58,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:10:58,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:10:58,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:10:58,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:10:58,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:10:58,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:10:58,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:10:58,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:10:58,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:10:58,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:10:58,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:10:58,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:10:58,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:10:58,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:10:58,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:10:58,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:10:59,020 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:10:59,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:10:59,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:10:59,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:10:59,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:10:59,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:10:59,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:10:59,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:10:59,022 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:10:59,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:10:59,023 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:10:59,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:10:59,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:10:59,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:10:59,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:10:59,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:10:59,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:10:59,024 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:10:59,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:10:59,024 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:10:59,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:10:59,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:10:59,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:10:59,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:10:59,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:10:59,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:10:59,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:10:59,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:10:59,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:10:59,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:10:59,027 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:10:59,027 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:10:59,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:10:59,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f [2022-07-22 10:10:59,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:10:59,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:10:59,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:10:59,226 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:10:59,226 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:10:59,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m2.c [2022-07-22 10:10:59,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e788dfef8/2622881875ca4844b8985fba2ebbb9a7/FLAG3269cd4ba [2022-07-22 10:10:59,572 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:10:59,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c [2022-07-22 10:10:59,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e788dfef8/2622881875ca4844b8985fba2ebbb9a7/FLAG3269cd4ba [2022-07-22 10:11:00,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e788dfef8/2622881875ca4844b8985fba2ebbb9a7 [2022-07-22 10:11:00,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:11:00,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:11:00,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:11:00,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:11:00,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:11:00,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ccc310b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00, skipping insertion in model container [2022-07-22 10:11:00,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:11:00,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:11:00,152 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2022-07-22 10:11:00,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:11:00,167 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:11:00,179 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2022-07-22 10:11:00,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:11:00,205 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:11:00,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00 WrapperNode [2022-07-22 10:11:00,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:11:00,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:11:00,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:11:00,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:11:00,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,231 INFO L137 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-07-22 10:11:00,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:11:00,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:11:00,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:11:00,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:11:00,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:11:00,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:11:00,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:11:00,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:11:00,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00" (1/1) ... [2022-07-22 10:11:00,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:11:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:00,278 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) [2022-07-22 10:11:00,283 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 [2022-07-22 10:11:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:11:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:11:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 10:11:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:11:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:11:00,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:11:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:11:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 10:11:00,378 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:11:00,380 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:11:00,557 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:11:00,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:11:00,561 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-22 10:11:00,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:11:00 BoogieIcfgContainer [2022-07-22 10:11:00,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:11:00,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:11:00,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:11:00,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:11:00,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:11:00" (1/3) ... [2022-07-22 10:11:00,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692daf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:11:00, skipping insertion in model container [2022-07-22 10:11:00,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:11:00" (2/3) ... [2022-07-22 10:11:00,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692daf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:11:00, skipping insertion in model container [2022-07-22 10:11:00,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:11:00" (3/3) ... [2022-07-22 10:11:00,568 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2022-07-22 10:11:00,592 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:11:00,592 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:11:00,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:11:00,656 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@248cff0e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@509a1878 [2022-07-22 10:11:00,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:11:00,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:00,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 10:11:00,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:00,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:00,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2022-07-22 10:11:00,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:00,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779212651] [2022-07-22 10:11:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:11:00,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779212651] [2022-07-22 10:11:00,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779212651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:11:00,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:11:00,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:11:00,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966397120] [2022-07-22 10:11:00,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:11:00,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:11:00,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:00,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:11:00,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:11:00,880 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:00,892 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-07-22 10:11:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:11:00,894 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-22 10:11:00,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:00,899 INFO L225 Difference]: With dead ends: 47 [2022-07-22 10:11:00,899 INFO L226 Difference]: Without dead ends: 21 [2022-07-22 10:11:00,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:11:00,914 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:00,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:11:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-22 10:11:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-22 10:11:00,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-22 10:11:00,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-07-22 10:11:00,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:00,941 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-22 10:11:00,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-22 10:11:00,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 10:11:00,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:00,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:00,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 10:11:00,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:00,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:00,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2022-07-22 10:11:00,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:00,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665131104] [2022-07-22 10:11:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:00,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:11:00,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:00,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665131104] [2022-07-22 10:11:00,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665131104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:11:00,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:11:00,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 10:11:00,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022092452] [2022-07-22 10:11:00,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:11:00,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 10:11:00,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:00,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 10:11:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 10:11:00,983 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:01,003 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-07-22 10:11:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 10:11:01,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-22 10:11:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:01,004 INFO L225 Difference]: With dead ends: 39 [2022-07-22 10:11:01,004 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 10:11:01,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 10:11:01,005 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:01,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:11:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 10:11:01,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-22 10:11:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-22 10:11:01,009 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-07-22 10:11:01,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:01,009 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-22 10:11:01,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,010 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-22 10:11:01,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 10:11:01,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:01,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:01,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 10:11:01,011 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:01,011 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2022-07-22 10:11:01,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:01,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316583216] [2022-07-22 10:11:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:01,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:11:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316583216] [2022-07-22 10:11:01,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316583216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:11:01,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:11:01,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:11:01,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819553188] [2022-07-22 10:11:01,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:11:01,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:11:01,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:01,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:11:01,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:11:01,052 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:01,110 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-07-22 10:11:01,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:11:01,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-22 10:11:01,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:01,112 INFO L225 Difference]: With dead ends: 43 [2022-07-22 10:11:01,112 INFO L226 Difference]: Without dead ends: 30 [2022-07-22 10:11:01,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:11:01,117 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:01,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:11:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-22 10:11:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-07-22 10:11:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-22 10:11:01,128 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-07-22 10:11:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:01,129 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-22 10:11:01,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-22 10:11:01,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 10:11:01,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:01,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:01,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 10:11:01,131 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:01,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2022-07-22 10:11:01,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:01,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014914429] [2022-07-22 10:11:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:01,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:11:01,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:01,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014914429] [2022-07-22 10:11:01,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014914429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:01,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479283603] [2022-07-22 10:11:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:01,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:01,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:01,202 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) [2022-07-22 10:11:01,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:11:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:01,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:11:01,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:11:01,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:11:01,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479283603] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:01,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:01,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 10:11:01,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10577678] [2022-07-22 10:11:01,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:01,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 10:11:01,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:01,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 10:11:01,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:11:01,322 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:01,350 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-22 10:11:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 10:11:01,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 10:11:01,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:01,351 INFO L225 Difference]: With dead ends: 49 [2022-07-22 10:11:01,351 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 10:11:01,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:11:01,352 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:01,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:11:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 10:11:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-22 10:11:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-07-22 10:11:01,356 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2022-07-22 10:11:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:01,356 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-07-22 10:11:01,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-07-22 10:11:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 10:11:01,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:01,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:01,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 10:11:01,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:01,574 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:01,575 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2022-07-22 10:11:01,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:01,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826869638] [2022-07-22 10:11:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:01,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:11:01,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:01,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826869638] [2022-07-22 10:11:01,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826869638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:01,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448733516] [2022-07-22 10:11:01,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:11:01,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:01,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:01,665 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) [2022-07-22 10:11:01,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:11:01,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:11:01,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:11:01,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:11:01,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:11:01,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:11:01,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448733516] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:01,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:01,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-22 10:11:01,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888508270] [2022-07-22 10:11:01,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:01,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 10:11:01,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:01,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 10:11:01,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-22 10:11:01,789 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:01,858 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-07-22 10:11:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 10:11:01,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-22 10:11:01,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:01,859 INFO L225 Difference]: With dead ends: 56 [2022-07-22 10:11:01,859 INFO L226 Difference]: Without dead ends: 40 [2022-07-22 10:11:01,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:11:01,860 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:01,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:11:01,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-22 10:11:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-07-22 10:11:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-07-22 10:11:01,870 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2022-07-22 10:11:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:01,870 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-07-22 10:11:01,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-07-22 10:11:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 10:11:01,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:01,872 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:11:01,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:11:02,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:02,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:02,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:02,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2022-07-22 10:11:02,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:02,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693222544] [2022-07-22 10:11:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:02,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:11:02,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:02,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693222544] [2022-07-22 10:11:02,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693222544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:02,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993710145] [2022-07-22 10:11:02,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:11:02,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:02,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:03,011 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) [2022-07-22 10:11:03,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:11:03,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 10:11:03,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:11:03,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-22 10:11:03,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:03,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:11:04,308 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:11:04,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2022-07-22 10:11:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:11:04,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:07,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-07-22 10:11:07,609 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:11:07,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-07-22 10:11:07,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-22 10:11:07,705 INFO L356 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2022-07-22 10:11:07,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 101 [2022-07-22 10:11:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:11:07,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993710145] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:07,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:07,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 29] total 71 [2022-07-22 10:11:07,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285352241] [2022-07-22 10:11:07,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:07,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-22 10:11:07,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:07,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-22 10:11:07,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=4589, Unknown=0, NotChecked=0, Total=4970 [2022-07-22 10:11:07,963 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:11,577 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2022-07-22 10:11:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-22 10:11:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-22 10:11:11,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:11,579 INFO L225 Difference]: With dead ends: 101 [2022-07-22 10:11:11,579 INFO L226 Difference]: Without dead ends: 95 [2022-07-22 10:11:11,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=869, Invalid=10687, Unknown=0, NotChecked=0, Total=11556 [2022-07-22 10:11:11,583 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:11,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 163 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 660 Invalid, 0 Unknown, 1204 Unchecked, 0.3s Time] [2022-07-22 10:11:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-22 10:11:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2022-07-22 10:11:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-07-22 10:11:11,601 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 35 [2022-07-22 10:11:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:11,601 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-07-22 10:11:11,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-07-22 10:11:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 10:11:11,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:11,603 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:11,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 10:11:11,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:11,820 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2022-07-22 10:11:11,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:11,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045574835] [2022-07-22 10:11:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:11,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:11:11,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:11,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045574835] [2022-07-22 10:11:11,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045574835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:11,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889341350] [2022-07-22 10:11:11,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:11:11,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:11,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:11,895 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) [2022-07-22 10:11:11,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:11:11,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:11:11,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:11:11,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:11:11,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:11:11,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:11:12,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889341350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:12,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:12,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-22 10:11:12,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962449032] [2022-07-22 10:11:12,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:12,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 10:11:12,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 10:11:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:11:12,037 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:12,157 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-07-22 10:11:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 10:11:12,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-22 10:11:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:12,158 INFO L225 Difference]: With dead ends: 113 [2022-07-22 10:11:12,158 INFO L226 Difference]: Without dead ends: 65 [2022-07-22 10:11:12,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-22 10:11:12,159 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:12,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 50 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:11:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-22 10:11:12,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-22 10:11:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-07-22 10:11:12,166 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 37 [2022-07-22 10:11:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:12,166 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-07-22 10:11:12,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-07-22 10:11:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 10:11:12,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:12,167 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:12,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 10:11:12,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:12,384 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1270817660, now seen corresponding path program 5 times [2022-07-22 10:11:12,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:12,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59032563] [2022-07-22 10:11:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:12,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 10:11:12,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:12,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59032563] [2022-07-22 10:11:12,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59032563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:12,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372094487] [2022-07-22 10:11:12,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:11:12,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:12,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:12,457 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) [2022-07-22 10:11:12,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 10:11:12,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 10:11:12,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:11:12,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:11:12,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 10:11:12,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 10:11:12,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372094487] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:12,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:12,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-22 10:11:12,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471411660] [2022-07-22 10:11:12,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:12,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 10:11:12,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:12,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 10:11:12,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:11:12,583 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:12,711 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2022-07-22 10:11:12,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 10:11:12,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 10:11:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:12,712 INFO L225 Difference]: With dead ends: 99 [2022-07-22 10:11:12,712 INFO L226 Difference]: Without dead ends: 62 [2022-07-22 10:11:12,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-22 10:11:12,713 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:12,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 29 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:11:12,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-22 10:11:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-07-22 10:11:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-22 10:11:12,719 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-07-22 10:11:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:12,719 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-22 10:11:12,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-22 10:11:12,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 10:11:12,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:12,721 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:11:12,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 10:11:12,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:12,939 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:12,940 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2022-07-22 10:11:12,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:12,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489500568] [2022-07-22 10:11:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:12,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:11:14,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:14,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489500568] [2022-07-22 10:11:14,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489500568] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:14,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788405673] [2022-07-22 10:11:14,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:11:14,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:14,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:14,180 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) [2022-07-22 10:11:14,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 10:11:14,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-22 10:11:14,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:11:14,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-22 10:11:14,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:11:15,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:48,985 INFO L356 Elim1Store]: treesize reduction 72, result has 68.8 percent of original size [2022-07-22 10:11:48,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 169 [2022-07-22 10:11:50,722 INFO L356 Elim1Store]: treesize reduction 218, result has 5.6 percent of original size [2022-07-22 10:11:50,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 24 [2022-07-22 10:11:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:11:51,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788405673] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:51,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:51,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 93 [2022-07-22 10:11:51,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679997079] [2022-07-22 10:11:51,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:51,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-07-22 10:11:51,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:51,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-07-22 10:11:51,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=7863, Unknown=7, NotChecked=0, Total=8556 [2022-07-22 10:11:51,136 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:52,491 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-07-22 10:11:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 10:11:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-22 10:11:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:52,492 INFO L225 Difference]: With dead ends: 79 [2022-07-22 10:11:52,492 INFO L226 Difference]: Without dead ends: 75 [2022-07-22 10:11:52,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4432 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=967, Invalid=10798, Unknown=7, NotChecked=0, Total=11772 [2022-07-22 10:11:52,495 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 543 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:52,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 130 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 665 Invalid, 0 Unknown, 543 Unchecked, 0.3s Time] [2022-07-22 10:11:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-22 10:11:52,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-07-22 10:11:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2022-07-22 10:11:52,500 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2022-07-22 10:11:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:52,500 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2022-07-22 10:11:52,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2022-07-22 10:11:52,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 10:11:52,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:52,501 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:52,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 10:11:52,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:52,708 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:52,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2022-07-22 10:11:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:52,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052403270] [2022-07-22 10:11:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:52,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 10:11:52,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:52,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052403270] [2022-07-22 10:11:52,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052403270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:52,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048081713] [2022-07-22 10:11:52,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:11:52,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:52,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:52,782 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) [2022-07-22 10:11:52,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 10:11:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:52,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:11:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 10:11:52,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 10:11:52,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048081713] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:52,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:52,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-22 10:11:52,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551349327] [2022-07-22 10:11:52,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:52,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 10:11:52,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:52,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 10:11:52,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:11:52,994 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:53,170 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2022-07-22 10:11:53,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 10:11:53,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-22 10:11:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:53,172 INFO L225 Difference]: With dead ends: 132 [2022-07-22 10:11:53,172 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 10:11:53,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-07-22 10:11:53,174 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:53,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 60 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:11:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 10:11:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-07-22 10:11:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2022-07-22 10:11:53,189 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2022-07-22 10:11:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:53,189 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2022-07-22 10:11:53,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2022-07-22 10:11:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 10:11:53,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:53,191 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:53,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 10:11:53,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:53,407 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1331298990, now seen corresponding path program 8 times [2022-07-22 10:11:53,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:53,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680758681] [2022-07-22 10:11:53,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:53,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 10:11:53,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:53,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680758681] [2022-07-22 10:11:53,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680758681] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:53,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263210561] [2022-07-22 10:11:53,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:11:53,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:53,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:53,485 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) [2022-07-22 10:11:53,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 10:11:53,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:11:53,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:11:53,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:11:53,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 10:11:53,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 10:11:53,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263210561] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:53,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:53,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-22 10:11:53,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007889072] [2022-07-22 10:11:53,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:53,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 10:11:53,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 10:11:53,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:11:53,656 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:53,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:53,837 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-07-22 10:11:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 10:11:53,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-22 10:11:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:53,838 INFO L225 Difference]: With dead ends: 101 [2022-07-22 10:11:53,838 INFO L226 Difference]: Without dead ends: 60 [2022-07-22 10:11:53,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:11:53,838 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:53,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 38 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:11:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-22 10:11:53,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-07-22 10:11:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-07-22 10:11:53,842 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2022-07-22 10:11:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:53,842 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-07-22 10:11:53,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-07-22 10:11:53,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 10:11:53,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:53,846 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:11:53,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 10:11:54,055 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,SelfDestructingSolverStorable10 [2022-07-22 10:11:54,055 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:54,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2022-07-22 10:11:54,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:54,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222177357] [2022-07-22 10:11:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:54,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:11:56,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222177357] [2022-07-22 10:11:56,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222177357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606997095] [2022-07-22 10:11:56,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:11:56,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:56,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:56,009 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) [2022-07-22 10:11:56,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 10:11:56,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 10:11:56,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:11:56,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-22 10:11:56,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:56,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:12:00,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:00,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:00,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:00,717 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:12:00,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 53 [2022-07-22 10:12:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:12:00,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:12:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:12:13,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606997095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:12:13,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:12:13,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 40, 38] total 116 [2022-07-22 10:12:13,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677961993] [2022-07-22 10:12:13,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:12:13,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-22 10:12:13,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:12:13,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-22 10:12:13,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=12695, Unknown=1, NotChecked=0, Total=13340 [2022-07-22 10:12:13,840 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:12:21,046 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-07-22 10:12:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 10:12:21,047 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-22 10:12:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:12:21,047 INFO L225 Difference]: With dead ends: 92 [2022-07-22 10:12:21,047 INFO L226 Difference]: Without dead ends: 88 [2022-07-22 10:12:21,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6667 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=1343, Invalid=26046, Unknown=1, NotChecked=0, Total=27390 [2022-07-22 10:12:21,053 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 740 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:12:21,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 191 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 548 Invalid, 0 Unknown, 740 Unchecked, 0.3s Time] [2022-07-22 10:12:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-22 10:12:21,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2022-07-22 10:12:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2022-07-22 10:12:21,062 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2022-07-22 10:12:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:12:21,063 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2022-07-22 10:12:21,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:21,063 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2022-07-22 10:12:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 10:12:21,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:12:21,064 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:12:21,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 10:12:21,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:12:21,277 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:12:21,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:12:21,277 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2022-07-22 10:12:21,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:12:21,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676816279] [2022-07-22 10:12:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:12:21,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:12:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:12:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 10:12:21,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:12:21,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676816279] [2022-07-22 10:12:21,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676816279] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:12:21,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805883872] [2022-07-22 10:12:21,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:12:21,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:12:21,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:12:21,408 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) [2022-07-22 10:12:21,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 10:12:21,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:12:21,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:12:21,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 10:12:21,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:12:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 10:12:21,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:12:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 10:12:21,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805883872] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:12:21,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:12:21,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-22 10:12:21,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636845788] [2022-07-22 10:12:21,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:12:21,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 10:12:21,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:12:21,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 10:12:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-07-22 10:12:21,633 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:21,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:12:21,799 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2022-07-22 10:12:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 10:12:21,800 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-22 10:12:21,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:12:21,800 INFO L225 Difference]: With dead ends: 160 [2022-07-22 10:12:21,800 INFO L226 Difference]: Without dead ends: 84 [2022-07-22 10:12:21,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:12:21,801 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:12:21,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 51 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:12:21,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-22 10:12:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-07-22 10:12:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-07-22 10:12:21,810 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 57 [2022-07-22 10:12:21,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:12:21,810 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-07-22 10:12:21,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-07-22 10:12:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 10:12:21,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:12:21,814 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:12:21,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-22 10:12:22,023 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,SelfDestructingSolverStorable12 [2022-07-22 10:12:22,023 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:12:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:12:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash -801227688, now seen corresponding path program 11 times [2022-07-22 10:12:22,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:12:22,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206710887] [2022-07-22 10:12:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:12:22,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:12:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:12:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 10:12:22,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:12:22,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206710887] [2022-07-22 10:12:22,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206710887] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:12:22,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637128147] [2022-07-22 10:12:22,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:12:22,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:12:22,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:12:22,107 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) [2022-07-22 10:12:22,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 10:12:22,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 10:12:22,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:12:22,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 10:12:22,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:12:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 10:12:22,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:12:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 10:12:22,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637128147] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:12:22,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:12:22,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-22 10:12:22,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526504371] [2022-07-22 10:12:22,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:12:22,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 10:12:22,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:12:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 10:12:22,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-07-22 10:12:22,342 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:12:22,540 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2022-07-22 10:12:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 10:12:22,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-22 10:12:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:12:22,541 INFO L225 Difference]: With dead ends: 119 [2022-07-22 10:12:22,541 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 10:12:22,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2022-07-22 10:12:22,542 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 182 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:12:22,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 36 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:12:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 10:12:22,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2022-07-22 10:12:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-07-22 10:12:22,553 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2022-07-22 10:12:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:12:22,553 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-07-22 10:12:22,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-07-22 10:12:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 10:12:22,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:12:22,554 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:12:22,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 10:12:22,767 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,SelfDestructingSolverStorable13 [2022-07-22 10:12:22,768 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:12:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:12:22,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2022-07-22 10:12:22,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:12:22,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030594723] [2022-07-22 10:12:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:12:22,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:12:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:12:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:12:24,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:12:24,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030594723] [2022-07-22 10:12:24,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030594723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:12:24,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127804425] [2022-07-22 10:12:24,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:12:24,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:12:24,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:12:24,994 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) [2022-07-22 10:12:24,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 10:12:25,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 10:12:25,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:12:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 102 conjunts are in the unsatisfiable core [2022-07-22 10:12:25,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:12:29,566 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:12:29,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 41 [2022-07-22 10:12:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:12:29,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:12:50,463 INFO L356 Elim1Store]: treesize reduction 387, result has 41.2 percent of original size [2022-07-22 10:12:50,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 285 [2022-07-22 10:12:51,283 INFO L356 Elim1Store]: treesize reduction 589, result has 10.5 percent of original size [2022-07-22 10:12:51,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 88 treesize of output 84 [2022-07-22 10:12:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 10:12:51,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127804425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:12:51,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:12:51,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 46] total 141 [2022-07-22 10:12:51,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493187912] [2022-07-22 10:12:51,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:12:51,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-07-22 10:12:51,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:12:51,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-07-22 10:12:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=18981, Unknown=0, NotChecked=0, Total=19740 [2022-07-22 10:12:51,701 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 141 states, 141 states have (on average 1.2411347517730495) internal successors, (175), 141 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:03,168 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2022-07-22 10:13:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 10:13:03,168 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.2411347517730495) internal successors, (175), 141 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-22 10:13:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:03,169 INFO L225 Difference]: With dead ends: 109 [2022-07-22 10:13:03,169 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 10:13:03,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9238 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=1531, Invalid=37870, Unknown=1, NotChecked=0, Total=39402 [2022-07-22 10:13:03,190 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1274 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:03,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 247 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1062 Invalid, 0 Unknown, 1274 Unchecked, 0.6s Time] [2022-07-22 10:13:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 10:13:03,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2022-07-22 10:13:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 94 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2022-07-22 10:13:03,211 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 65 [2022-07-22 10:13:03,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:03,211 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2022-07-22 10:13:03,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.2411347517730495) internal successors, (175), 141 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2022-07-22 10:13:03,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 10:13:03,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:03,212 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:03,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-22 10:13:03,432 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,SelfDestructingSolverStorable14 [2022-07-22 10:13:03,432 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2022-07-22 10:13:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:03,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158536934] [2022-07-22 10:13:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 10:13:03,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:13:03,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158536934] [2022-07-22 10:13:03,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158536934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:13:03,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751887550] [2022-07-22 10:13:03,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:13:03,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:03,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:03,563 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) [2022-07-22 10:13:03,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 10:13:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 10:13:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:13:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 10:13:03,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:13:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 10:13:03,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751887550] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:13:03,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:13:03,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-22 10:13:03,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703770262] [2022-07-22 10:13:03,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:13:03,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 10:13:03,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:13:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 10:13:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:13:03,823 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:04,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:04,049 INFO L93 Difference]: Finished difference Result 188 states and 202 transitions. [2022-07-22 10:13:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 10:13:04,050 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-22 10:13:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:04,050 INFO L225 Difference]: With dead ends: 188 [2022-07-22 10:13:04,050 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 10:13:04,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-07-22 10:13:04,051 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:04,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 66 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:13:04,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 10:13:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-07-22 10:13:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2022-07-22 10:13:04,062 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 67 [2022-07-22 10:13:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:04,062 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2022-07-22 10:13:04,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2022-07-22 10:13:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 10:13:04,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:04,063 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:04,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 10:13:04,279 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,SelfDestructingSolverStorable15 [2022-07-22 10:13:04,279 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash 721627522, now seen corresponding path program 14 times [2022-07-22 10:13:04,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:04,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825988949] [2022-07-22 10:13:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:04,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 10:13:04,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:13:04,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825988949] [2022-07-22 10:13:04,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825988949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:13:04,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30462667] [2022-07-22 10:13:04,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:13:04,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:04,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:04,400 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) [2022-07-22 10:13:04,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 10:13:04,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:13:04,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:13:04,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 10:13:04,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:13:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 10:13:04,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:13:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 10:13:04,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30462667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:13:04,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:13:04,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-22 10:13:04,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288874101] [2022-07-22 10:13:04,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:13:04,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 10:13:04,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:13:04,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 10:13:04,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:13:04,639 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:04,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:04,877 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2022-07-22 10:13:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 10:13:04,877 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 10:13:04,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:04,878 INFO L225 Difference]: With dead ends: 137 [2022-07-22 10:13:04,878 INFO L226 Difference]: Without dead ends: 80 [2022-07-22 10:13:04,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2022-07-22 10:13:04,878 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 253 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:04,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 32 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:13:04,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-22 10:13:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-07-22 10:13:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-07-22 10:13:04,886 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2022-07-22 10:13:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:04,887 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-07-22 10:13:04,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-07-22 10:13:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 10:13:04,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:04,888 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:04,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 10:13:05,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:05,089 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:05,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:05,089 INFO L85 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2022-07-22 10:13:05,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:05,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109119456] [2022-07-22 10:13:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:05,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 1 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:13:08,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:13:08,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109119456] [2022-07-22 10:13:08,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109119456] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:13:08,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991470153] [2022-07-22 10:13:08,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:13:08,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:08,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:08,885 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) [2022-07-22 10:13:08,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 10:13:08,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-22 10:13:08,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:13:08,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 122 conjunts are in the unsatisfiable core [2022-07-22 10:13:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:13:09,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:13:18,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:13:18,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:13:18,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:13:18,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:13:18,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:13:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:13:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:13:18,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:13:18,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:13:18,422 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:13:18,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 103 [2022-07-22 10:13:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 164 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:13:18,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:13:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 10:13:59,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991470153] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:13:59,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:13:59,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 58, 54] total 166 [2022-07-22 10:13:59,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883589409] [2022-07-22 10:13:59,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:13:59,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-07-22 10:13:59,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:13:59,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-07-22 10:13:59,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=26518, Unknown=0, NotChecked=0, Total=27390 [2022-07-22 10:13:59,432 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 166 states, 166 states have (on average 1.2108433734939759) internal successors, (201), 166 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:14:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:14:21,711 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-07-22 10:14:21,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-22 10:14:21,712 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.2108433734939759) internal successors, (201), 166 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-22 10:14:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:14:21,712 INFO L225 Difference]: With dead ends: 124 [2022-07-22 10:14:21,712 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 10:14:21,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11264 ImplicationChecksByTransitivity, 72.5s TimeCoverageRelationStatistics Valid=2097, Invalid=53363, Unknown=0, NotChecked=0, Total=55460 [2022-07-22 10:14:21,715 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1898 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 10:14:21,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 279 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1249 Invalid, 0 Unknown, 1898 Unchecked, 0.7s Time] [2022-07-22 10:14:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 10:14:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2022-07-22 10:14:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 108 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:14:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2022-07-22 10:14:21,730 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 75 [2022-07-22 10:14:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:14:21,730 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2022-07-22 10:14:21,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.2108433734939759) internal successors, (201), 166 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:14:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2022-07-22 10:14:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 10:14:21,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:14:21,731 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:14:21,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 10:14:21,935 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,SelfDestructingSolverStorable17 [2022-07-22 10:14:21,936 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:14:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:14:21,936 INFO L85 PathProgramCache]: Analyzing trace with hash -932406390, now seen corresponding path program 16 times [2022-07-22 10:14:21,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:14:21,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377963185] [2022-07-22 10:14:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:14:21,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:14:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:14:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 10:14:22,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:14:22,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377963185] [2022-07-22 10:14:22,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377963185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:14:22,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372040351] [2022-07-22 10:14:22,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:14:22,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:22,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:14:22,112 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) [2022-07-22 10:14:22,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 10:14:22,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:14:22,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:14:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 10:14:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:14:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 10:14:22,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:14:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 10:14:22,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372040351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:14:22,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:14:22,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-22 10:14:22,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298965735] [2022-07-22 10:14:22,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:14:22,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 10:14:22,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:14:22,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 10:14:22,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:14:22,514 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:14:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:14:22,831 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2022-07-22 10:14:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 10:14:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-22 10:14:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:14:22,832 INFO L225 Difference]: With dead ends: 216 [2022-07-22 10:14:22,832 INFO L226 Difference]: Without dead ends: 112 [2022-07-22 10:14:22,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 10:14:22,832 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:14:22,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 72 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:14:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-22 10:14:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-07-22 10:14:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 110 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:14:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2022-07-22 10:14:22,867 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 77 [2022-07-22 10:14:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:14:22,867 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2022-07-22 10:14:22,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:14:22,868 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2022-07-22 10:14:22,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 10:14:22,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:14:22,868 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:14:22,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-22 10:14:23,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:23,083 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:14:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:14:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1623823828, now seen corresponding path program 17 times [2022-07-22 10:14:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:14:23,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338274107] [2022-07-22 10:14:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:14:23,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:14:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:14:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:14:23,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:14:23,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338274107] [2022-07-22 10:14:23,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338274107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:14:23,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406153447] [2022-07-22 10:14:23,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:14:23,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:23,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:14:23,220 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) [2022-07-22 10:14:23,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 10:14:23,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-22 10:14:23,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:14:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 10:14:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:14:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:14:23,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:14:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:14:23,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406153447] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:14:23,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:14:23,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-07-22 10:14:23,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618296108] [2022-07-22 10:14:23,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:14:23,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 10:14:23,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:14:23,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 10:14:23,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 10:14:23,764 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:14:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:14:24,160 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-07-22 10:14:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 10:14:24,160 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-22 10:14:24,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:14:24,160 INFO L225 Difference]: With dead ends: 155 [2022-07-22 10:14:24,160 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 10:14:24,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 10:14:24,161 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 223 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:14:24,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 49 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:14:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 10:14:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-07-22 10:14:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:14:24,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-07-22 10:14:24,173 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 79 [2022-07-22 10:14:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:14:24,173 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-07-22 10:14:24,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:14:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-07-22 10:14:24,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 10:14:24,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:14:24,174 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:14:24,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-22 10:14:24,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:24,392 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:14:24,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:14:24,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1053375342, now seen corresponding path program 18 times [2022-07-22 10:14:24,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:14:24,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413351485] [2022-07-22 10:14:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:14:24,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:14:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:14:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 4 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:14:29,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:14:29,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413351485] [2022-07-22 10:14:29,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413351485] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:14:29,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778129289] [2022-07-22 10:14:29,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:14:29,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:29,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:14:29,540 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) [2022-07-22 10:14:29,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 10:14:29,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-22 10:14:29,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:14:29,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 134 conjunts are in the unsatisfiable core [2022-07-22 10:14:29,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:14:50,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:14:50,324 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:14:50,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 251 [2022-07-22 10:14:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 13 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 10:14:50,907 INFO L328 TraceCheckSpWp]: Computing backward predicates...