./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/nsqm.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-fpi/nsqm.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 b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:10:57,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:10:57,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:10:57,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:10:57,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:10:57,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:10:57,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:10:57,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:10:57,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:10:57,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:10:57,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:10:57,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:10:57,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:10:57,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:10:57,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:10:57,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:10:57,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:10:57,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:10:57,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:10:57,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:10:57,994 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:10:57,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:10:57,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:10:57,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:10:57,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:10:58,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:10:58,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:10:58,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:10:58,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:10:58,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:10:58,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:10:58,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:10:58,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:10:58,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:10:58,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:10:58,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:10:58,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:10:58,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:10:58,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:10:58,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:10:58,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:10:58,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:10:58,011 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:10:58,032 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:10:58,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:10:58,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:10:58,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:10:58,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:10:58,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:10:58,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:10:58,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:10:58,034 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:10:58,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:10:58,035 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:10:58,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:10:58,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:10:58,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:10:58,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:10:58,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:10:58,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:10:58,036 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:10:58,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:10:58,037 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:10:58,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:10:58,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:10:58,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:10:58,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:10:58,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:10:58,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:10:58,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:10:58,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:10:58,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:10:58,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:10:58,038 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:10:58,038 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:10:58,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:10:58,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 [2022-07-13 11:10:58,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:10:58,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:10:58,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:10:58,213 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:10:58,213 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:10:58,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm.c [2022-07-13 11:10:58,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c916db12e/2aa05743fc22442ca70d8ed3d395b869/FLAG120f3e263 [2022-07-13 11:10:58,575 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:10:58,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c [2022-07-13 11:10:58,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c916db12e/2aa05743fc22442ca70d8ed3d395b869/FLAG120f3e263 [2022-07-13 11:10:59,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c916db12e/2aa05743fc22442ca70d8ed3d395b869 [2022-07-13 11:10:59,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:10:59,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:10:59,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:10:59,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:10:59,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:10:59,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3476e3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59, skipping insertion in model container [2022-07-13 11:10:59,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:10:59,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:10:59,137 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-fpi/nsqm.c[587,600] [2022-07-13 11:10:59,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:10:59,161 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:10:59,177 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-fpi/nsqm.c[587,600] [2022-07-13 11:10:59,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:10:59,195 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:10:59,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59 WrapperNode [2022-07-13 11:10:59,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:10:59,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:10:59,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:10:59,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:10:59,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,223 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-07-13 11:10:59,224 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:10:59,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:10:59,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:10:59,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:10:59,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:10:59,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:10:59,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:10:59,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:10:59,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59" (1/1) ... [2022-07-13 11:10:59,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:10:59,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:59,264 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) [2022-07-13 11:10:59,271 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 [2022-07-13 11:10:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:10:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:10:59,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 11:10:59,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:10:59,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:10:59,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:10:59,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 11:10:59,332 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:10:59,333 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:10:59,418 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:10:59,422 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:10:59,422 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 11:10:59,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:10:59 BoogieIcfgContainer [2022-07-13 11:10:59,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:10:59,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:10:59,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:10:59,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:10:59,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:10:59" (1/3) ... [2022-07-13 11:10:59,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be80709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:10:59, skipping insertion in model container [2022-07-13 11:10:59,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:59" (2/3) ... [2022-07-13 11:10:59,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be80709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:10:59, skipping insertion in model container [2022-07-13 11:10:59,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:10:59" (3/3) ... [2022-07-13 11:10:59,435 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm.c [2022-07-13 11:10:59,444 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:10:59,444 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:10:59,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:10:59,501 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@28a9136a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@60bd7cbe [2022-07-13 11:10:59,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:10:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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) [2022-07-13 11:10:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 11:10:59,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:59,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:59,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2022-07-13 11:10:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:59,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064740685] [2022-07-13 11:10:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:59,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:59,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:59,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064740685] [2022-07-13 11:10:59,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064740685] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:10:59,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:10:59,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:10:59,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781932327] [2022-07-13 11:10:59,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:10:59,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 11:10:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:59,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 11:10:59,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:10:59,643 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-07-13 11:10:59,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:59,655 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-07-13 11:10:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 11:10:59,656 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2022-07-13 11:10:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:59,661 INFO L225 Difference]: With dead ends: 38 [2022-07-13 11:10:59,662 INFO L226 Difference]: Without dead ends: 17 [2022-07-13 11:10:59,664 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 [2022-07-13 11:10:59,670 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2022-07-13 11:10:59,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:10:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-13 11:10:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-13 11:10:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-07-13 11:10:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-13 11:10:59,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-07-13 11:10:59,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:59,696 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-13 11:10:59,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-07-13 11:10:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-13 11:10:59,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 11:10:59,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:59,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:59,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:10:59,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2022-07-13 11:10:59,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:59,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23162142] [2022-07-13 11:10:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:59,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:59,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:10:59,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739866127] [2022-07-13 11:10:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:59,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:59,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:59,745 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) [2022-07-13 11:10:59,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:10:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:59,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 11:10:59,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:59,903 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-07-13 11:10:59,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-07-13 11:10:59,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:10:59,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:11:00,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-13 11:11:00,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-13 11:11:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:00,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:11:00,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23162142] [2022-07-13 11:11:00,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739866127] [2022-07-13 11:11:00,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739866127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:11:00,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:11:00,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:11:00,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330146135] [2022-07-13 11:11:00,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:11:00,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:11:00,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:11:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:11:00,289 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-07-13 11:11:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:00,384 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-07-13 11:11:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:11:00,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2022-07-13 11:11:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:00,386 INFO L225 Difference]: With dead ends: 34 [2022-07-13 11:11:00,387 INFO L226 Difference]: Without dead ends: 32 [2022-07-13 11:11:00,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:11:00,389 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:00,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 48 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:11:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-13 11:11:00,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-13 11:11:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2022-07-13 11:11:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-13 11:11:00,404 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-07-13 11:11:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:00,404 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-13 11:11:00,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-07-13 11:11:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-13 11:11:00,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 11:11:00,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:00,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:00,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 11:11:00,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:00,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:00,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2022-07-13 11:11:00,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:00,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015671600] [2022-07-13 11:11:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:00,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:00,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:00,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785555101] [2022-07-13 11:11:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:00,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:00,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:00,675 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) [2022-07-13 11:11:00,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:11:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:00,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 11:11:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:00,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:11:00,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015671600] [2022-07-13 11:11:00,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785555101] [2022-07-13 11:11:00,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785555101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:11:00,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:11:00,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:11:00,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609086010] [2022-07-13 11:11:00,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:11:00,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:11:00,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:11:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:11:00,752 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-07-13 11:11:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:00,812 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-07-13 11:11:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:11:00,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2022-07-13 11:11:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:00,814 INFO L225 Difference]: With dead ends: 49 [2022-07-13 11:11:00,814 INFO L226 Difference]: Without dead ends: 40 [2022-07-13 11:11:00,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:11:00,817 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:00,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:11:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-13 11:11:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-07-13 11:11:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2022-07-13 11:11:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-13 11:11:00,822 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-07-13 11:11:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:00,823 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-13 11:11:00,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-07-13 11:11:00,823 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-13 11:11:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 11:11:00,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:00,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:00,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 11:11:01,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-13 11:11:01,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2022-07-13 11:11:01,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:01,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294964252] [2022-07-13 11:11:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:01,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:01,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:01,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160771221] [2022-07-13 11:11:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:01,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:01,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:01,067 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) [2022-07-13 11:11:01,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:11:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:01,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 11:11:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:01,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:01,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:01,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294964252] [2022-07-13 11:11:01,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:01,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160771221] [2022-07-13 11:11:01,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160771221] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:01,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:01,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-13 11:11:01,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012348149] [2022-07-13 11:11:01,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:01,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:11:01,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:01,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:11:01,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:11:01,142 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-07-13 11:11:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:01,217 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-07-13 11:11:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:11:01,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 14 [2022-07-13 11:11:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:01,218 INFO L225 Difference]: With dead ends: 44 [2022-07-13 11:11:01,218 INFO L226 Difference]: Without dead ends: 37 [2022-07-13 11:11:01,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:11:01,221 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:01,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:11:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-13 11:11:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-07-13 11:11:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2022-07-13 11:11:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-13 11:11:01,236 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2022-07-13 11:11:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:01,236 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-13 11:11:01,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-07-13 11:11:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-13 11:11:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 11:11:01,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:01,237 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:01,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:01,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:01,449 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:01,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2022-07-13 11:11:01,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:01,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76355143] [2022-07-13 11:11:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:01,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:01,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:01,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443756267] [2022-07-13 11:11:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:01,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:01,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:01,473 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) [2022-07-13 11:11:01,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:11:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:01,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 11:11:01,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:01,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:11:01,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:01,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76355143] [2022-07-13 11:11:01,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:01,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443756267] [2022-07-13 11:11:01,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443756267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:11:01,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:11:01,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:11:01,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892935689] [2022-07-13 11:11:01,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:11:01,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:11:01,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:11:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:11:01,553 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-07-13 11:11:01,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:01,616 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-07-13 11:11:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:11:01,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 16 [2022-07-13 11:11:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:01,617 INFO L225 Difference]: With dead ends: 41 [2022-07-13 11:11:01,617 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 11:11:01,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:11:01,618 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:01,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:11:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 11:11:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-07-13 11:11:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2022-07-13 11:11:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-13 11:11:01,620 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2022-07-13 11:11:01,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:01,620 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-13 11:11:01,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-07-13 11:11:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-13 11:11:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 11:11:01,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:01,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:01,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:01,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:01,830 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:01,831 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2022-07-13 11:11:01,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:01,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404024595] [2022-07-13 11:11:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:01,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:01,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:01,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651411908] [2022-07-13 11:11:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:01,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:01,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:01,849 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) [2022-07-13 11:11:01,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 11:11:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:01,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 11:11:01,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:01,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 11:11:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:01,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2022-07-13 11:11:01,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:11:01,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-13 11:11:01,982 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-13 11:11:01,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-13 11:11:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:02,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:02,164 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_147 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_147) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ c_~N~0 1))) is different from false [2022-07-13 11:11:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-13 11:11:02,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404024595] [2022-07-13 11:11:02,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651411908] [2022-07-13 11:11:02,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651411908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:02,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:02,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-13 11:11:02,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452503105] [2022-07-13 11:11:02,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:02,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:11:02,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:02,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:11:02,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=52, Unknown=1, NotChecked=14, Total=90 [2022-07-13 11:11:02,182 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-07-13 11:11:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:02,302 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-07-13 11:11:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:11:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 16 [2022-07-13 11:11:02,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:02,303 INFO L225 Difference]: With dead ends: 35 [2022-07-13 11:11:02,303 INFO L226 Difference]: Without dead ends: 33 [2022-07-13 11:11:02,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=110, Unknown=1, NotChecked=22, Total=182 [2022-07-13 11:11:02,303 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:02,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 57 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-07-13 11:11:02,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-13 11:11:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2022-07-13 11:11:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2022-07-13 11:11:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-13 11:11:02,306 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2022-07-13 11:11:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:02,306 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-13 11:11:02,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-07-13 11:11:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-13 11:11:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 11:11:02,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:02,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:02,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:02,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:02,515 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2022-07-13 11:11:02,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:02,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330146400] [2022-07-13 11:11:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:02,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:02,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:02,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281082344] [2022-07-13 11:11:02,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:11:02,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:02,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:02,540 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) [2022-07-13 11:11:02,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 11:11:02,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:11:02,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:11:02,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 11:11:02,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:02,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:02,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:02,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330146400] [2022-07-13 11:11:02,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:02,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281082344] [2022-07-13 11:11:02,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281082344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:02,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:02,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-13 11:11:02,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444759371] [2022-07-13 11:11:02,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:02,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:11:02,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:02,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:11:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:11:02,642 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-07-13 11:11:02,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:02,721 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-07-13 11:11:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:11:02,721 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 18 [2022-07-13 11:11:02,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:02,721 INFO L225 Difference]: With dead ends: 60 [2022-07-13 11:11:02,721 INFO L226 Difference]: Without dead ends: 51 [2022-07-13 11:11:02,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:11:02,722 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:02,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 37 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:11:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-13 11:11:02,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2022-07-13 11:11:02,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2022-07-13 11:11:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-13 11:11:02,725 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-07-13 11:11:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:02,725 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-13 11:11:02,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-07-13 11:11:02,725 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-13 11:11:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 11:11:02,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:02,726 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:02,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:02,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:02,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:02,927 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2022-07-13 11:11:02,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:02,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932390848] [2022-07-13 11:11:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:02,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:02,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:02,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308345566] [2022-07-13 11:11:02,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:02,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:02,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:02,943 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) [2022-07-13 11:11:02,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 11:11:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:03,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 11:11:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:03,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 11:11:03,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:03,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-13 11:11:03,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-07-13 11:11:03,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:11:03,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 11:11:03,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:03,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-13 11:11:03,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:03,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-07-13 11:11:03,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 30 [2022-07-13 11:11:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:03,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:03,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932390848] [2022-07-13 11:11:03,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:03,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308345566] [2022-07-13 11:11:03,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308345566] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:03,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:03,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-07-13 11:11:03,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328734046] [2022-07-13 11:11:03,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:03,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:11:03,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:11:03,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:11:03,627 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2022-07-13 11:11:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:03,748 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-07-13 11:11:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:11:03,749 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 20 [2022-07-13 11:11:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:03,749 INFO L225 Difference]: With dead ends: 39 [2022-07-13 11:11:03,749 INFO L226 Difference]: Without dead ends: 37 [2022-07-13 11:11:03,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:11:03,750 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:03,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-07-13 11:11:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-13 11:11:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-13 11:11:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 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) [2022-07-13 11:11:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-07-13 11:11:03,753 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2022-07-13 11:11:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:03,753 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-07-13 11:11:03,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2022-07-13 11:11:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-07-13 11:11:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 11:11:03,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:03,754 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:03,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:03,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:03,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:03,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2022-07-13 11:11:03,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:03,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63009331] [2022-07-13 11:11:03,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:03,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:03,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:03,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998618142] [2022-07-13 11:11:03,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:11:03,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:03,984 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) [2022-07-13 11:11:03,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 11:11:04,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 11:11:04,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:11:04,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 11:11:04,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:04,148 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-07-13 11:11:04,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-07-13 11:11:04,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:11:04,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:11:04,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2022-07-13 11:11:04,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-13 11:11:04,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 11:11:04,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-13 11:11:04,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-13 11:11:04,351 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-07-13 11:11:04,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-13 11:11:04,389 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-07-13 11:11:04,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-13 11:11:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:04,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:04,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:04,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63009331] [2022-07-13 11:11:04,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:04,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998618142] [2022-07-13 11:11:04,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998618142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:04,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:04,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2022-07-13 11:11:04,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224402636] [2022-07-13 11:11:04,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:04,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 11:11:04,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:04,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 11:11:04,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-07-13 11:11:04,789 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 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) [2022-07-13 11:11:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:05,169 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-07-13 11:11:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 11:11:05,170 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 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 20 [2022-07-13 11:11:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:05,170 INFO L225 Difference]: With dead ends: 81 [2022-07-13 11:11:05,170 INFO L226 Difference]: Without dead ends: 79 [2022-07-13 11:11:05,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=888, Unknown=1, NotChecked=0, Total=1190 [2022-07-13 11:11:05,171 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 84 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:05,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 117 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 224 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-07-13 11:11:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-13 11:11:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 41. [2022-07-13 11:11:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 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) [2022-07-13 11:11:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-07-13 11:11:05,176 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 20 [2022-07-13 11:11:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:05,176 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-07-13 11:11:05,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 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) [2022-07-13 11:11:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-07-13 11:11:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 11:11:05,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:05,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:05,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:05,383 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,SelfDestructingSolverStorable8 [2022-07-13 11:11:05,384 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:05,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash 986773582, now seen corresponding path program 2 times [2022-07-13 11:11:05,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:05,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713617160] [2022-07-13 11:11:05,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:05,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:05,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599976890] [2022-07-13 11:11:05,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:11:05,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:05,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:05,399 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) [2022-07-13 11:11:05,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 11:11:05,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:11:05,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:11:05,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 11:11:05,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 11:11:05,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 11:11:05,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:05,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713617160] [2022-07-13 11:11:05,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:05,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599976890] [2022-07-13 11:11:05,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599976890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:05,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:05,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-13 11:11:05,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364863130] [2022-07-13 11:11:05,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:05,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:11:05,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:05,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:11:05,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:11:05,500 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-07-13 11:11:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:05,603 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-07-13 11:11:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:11:05,604 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) Word has length 22 [2022-07-13 11:11:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:05,604 INFO L225 Difference]: With dead ends: 70 [2022-07-13 11:11:05,604 INFO L226 Difference]: Without dead ends: 61 [2022-07-13 11:11:05,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:11:05,605 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:05,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 61 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:11:05,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-13 11:11:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2022-07-13 11:11:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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) [2022-07-13 11:11:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-13 11:11:05,609 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2022-07-13 11:11:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:05,609 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-13 11:11:05,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-07-13 11:11:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-13 11:11:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 11:11:05,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:05,610 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:05,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:05,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 11:11:05,817 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:05,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:05,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 3 times [2022-07-13 11:11:05,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:05,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956999810] [2022-07-13 11:11:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:05,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:05,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:05,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084318143] [2022-07-13 11:11:05,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:11:05,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:05,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:05,831 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) [2022-07-13 11:11:05,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 11:11:05,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 11:11:05,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:11:05,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:11:05,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:11:05,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:11:06,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:06,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956999810] [2022-07-13 11:11:06,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:06,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084318143] [2022-07-13 11:11:06,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084318143] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:06,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:06,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-13 11:11:06,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090422983] [2022-07-13 11:11:06,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:06,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:11:06,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:06,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:11:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:11:06,015 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2022-07-13 11:11:06,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:06,118 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-07-13 11:11:06,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:11:06,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 24 [2022-07-13 11:11:06,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:06,119 INFO L225 Difference]: With dead ends: 65 [2022-07-13 11:11:06,119 INFO L226 Difference]: Without dead ends: 45 [2022-07-13 11:11:06,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:11:06,120 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:06,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:11:06,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-13 11:11:06,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2022-07-13 11:11:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 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) [2022-07-13 11:11:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-07-13 11:11:06,123 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 24 [2022-07-13 11:11:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:06,123 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-07-13 11:11:06,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2022-07-13 11:11:06,123 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-07-13 11:11:06,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 11:11:06,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:06,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:06,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:06,339 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,SelfDestructingSolverStorable10 [2022-07-13 11:11:06,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 4 times [2022-07-13 11:11:06,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:06,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060439495] [2022-07-13 11:11:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:06,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:06,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:06,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003568877] [2022-07-13 11:11:06,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:11:06,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:06,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:06,363 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:11:06,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 11:11:06,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:11:06,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:11:06,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 11:11:06,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:06,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 11:11:06,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-13 11:11:06,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-07-13 11:11:06,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:11:06,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 11:11:06,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-07-13 11:11:06,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-13 11:11:06,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 131 [2022-07-13 11:11:06,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:06,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 198 [2022-07-13 11:11:06,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 50 [2022-07-13 11:11:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:06,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-07-13 11:11:06,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 30 [2022-07-13 11:11:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:06,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:09,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:09,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060439495] [2022-07-13 11:11:09,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:09,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003568877] [2022-07-13 11:11:09,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003568877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:09,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:09,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2022-07-13 11:11:09,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485322826] [2022-07-13 11:11:09,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:09,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 11:11:09,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:09,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 11:11:09,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-07-13 11:11:09,073 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2022-07-13 11:11:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:09,449 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-07-13 11:11:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 11:11:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 24 [2022-07-13 11:11:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:09,450 INFO L225 Difference]: With dead ends: 65 [2022-07-13 11:11:09,450 INFO L226 Difference]: Without dead ends: 63 [2022-07-13 11:11:09,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-07-13 11:11:09,451 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:09,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-07-13 11:11:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-13 11:11:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-07-13 11:11:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 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) [2022-07-13 11:11:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-07-13 11:11:09,459 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 24 [2022-07-13 11:11:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:09,459 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-07-13 11:11:09,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2022-07-13 11:11:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-07-13 11:11:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 11:11:09,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:09,461 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:09,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:09,661 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,SelfDestructingSolverStorable11 [2022-07-13 11:11:09,662 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:09,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:09,662 INFO L85 PathProgramCache]: Analyzing trace with hash -552182704, now seen corresponding path program 4 times [2022-07-13 11:11:09,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:09,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325378238] [2022-07-13 11:11:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:09,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:09,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:09,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556757444] [2022-07-13 11:11:09,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:11:09,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:09,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:09,680 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) [2022-07-13 11:11:09,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 11:11:09,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:11:09,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:11:09,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 11:11:09,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 11:11:09,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 11:11:09,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325378238] [2022-07-13 11:11:09,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556757444] [2022-07-13 11:11:09,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556757444] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:09,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:09,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-07-13 11:11:09,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108848214] [2022-07-13 11:11:09,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:09,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 11:11:09,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 11:11:09,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:11:09,848 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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) [2022-07-13 11:11:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:10,108 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2022-07-13 11:11:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 11:11:10,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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) Word has length 26 [2022-07-13 11:11:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:10,109 INFO L225 Difference]: With dead ends: 140 [2022-07-13 11:11:10,109 INFO L226 Difference]: Without dead ends: 116 [2022-07-13 11:11:10,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2022-07-13 11:11:10,110 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 182 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:10,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 97 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:11:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-13 11:11:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 68. [2022-07-13 11:11:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 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) [2022-07-13 11:11:10,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2022-07-13 11:11:10,116 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 26 [2022-07-13 11:11:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:10,116 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2022-07-13 11:11:10,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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) [2022-07-13 11:11:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2022-07-13 11:11:10,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 11:11:10,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:10,117 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:10,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:10,317 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,SelfDestructingSolverStorable12 [2022-07-13 11:11:10,317 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:10,318 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 5 times [2022-07-13 11:11:10,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:10,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816084103] [2022-07-13 11:11:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:10,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:10,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:10,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313017666] [2022-07-13 11:11:10,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 11:11:10,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:10,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:10,330 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) [2022-07-13 11:11:10,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 11:11:15,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 11:11:15,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:11:15,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-13 11:11:15,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:15,855 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-07-13 11:11:15,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 58 [2022-07-13 11:11:15,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 35 [2022-07-13 11:11:15,877 INFO L356 Elim1Store]: treesize reduction 34, result has 34.6 percent of original size [2022-07-13 11:11:15,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 70 [2022-07-13 11:11:15,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2022-07-13 11:11:15,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 11:11:15,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:11:15,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 11:11:15,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 111 [2022-07-13 11:11:15,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:15,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-13 11:11:16,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 74 [2022-07-13 11:11:16,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-07-13 11:11:16,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 153 [2022-07-13 11:11:16,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:16,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 201 [2022-07-13 11:11:16,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 52 [2022-07-13 11:11:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:16,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:16,301 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:11:16,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 66 treesize of output 60 [2022-07-13 11:11:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:16,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:24,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:24,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816084103] [2022-07-13 11:11:24,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:24,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313017666] [2022-07-13 11:11:24,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313017666] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:24,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:24,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-07-13 11:11:24,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980682195] [2022-07-13 11:11:24,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:24,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 11:11:24,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:11:24,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 11:11:24,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-07-13 11:11:24,440 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-07-13 11:11:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:29,094 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2022-07-13 11:11:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 11:11:29,095 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) Word has length 28 [2022-07-13 11:11:29,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:29,095 INFO L225 Difference]: With dead ends: 85 [2022-07-13 11:11:29,095 INFO L226 Difference]: Without dead ends: 55 [2022-07-13 11:11:29,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 11:11:29,096 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:29,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 111 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 185 Invalid, 0 Unknown, 102 Unchecked, 0.7s Time] [2022-07-13 11:11:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-13 11:11:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-13 11:11:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 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) [2022-07-13 11:11:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-07-13 11:11:29,101 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 28 [2022-07-13 11:11:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:29,101 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-07-13 11:11:29,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-07-13 11:11:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-07-13 11:11:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 11:11:29,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:29,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:29,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:29,309 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,SelfDestructingSolverStorable13 [2022-07-13 11:11:29,309 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:29,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:29,310 INFO L85 PathProgramCache]: Analyzing trace with hash 48972360, now seen corresponding path program 6 times [2022-07-13 11:11:29,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:11:29,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110913006] [2022-07-13 11:11:29,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:29,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:11:29,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:11:29,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336182777] [2022-07-13 11:11:29,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 11:11:29,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:29,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:29,335 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) [2022-07-13 11:11:29,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 11:11:30,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 11:11:30,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:11:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-13 11:11:30,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:30,087 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-07-13 11:11:30,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 58 [2022-07-13 11:11:30,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 35 [2022-07-13 11:11:30,111 INFO L356 Elim1Store]: treesize reduction 34, result has 34.6 percent of original size [2022-07-13 11:11:30,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 70 [2022-07-13 11:11:30,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 11:11:30,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:11:30,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-13 11:11:30,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-07-13 11:11:30,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-13 11:11:30,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 11:11:30,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-07-13 11:11:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-07-13 11:11:30,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-13 11:11:30,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,426 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 11:11:30,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-07-13 11:11:30,511 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-13 11:11:30,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 75 [2022-07-13 11:11:30,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,538 INFO L356 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2022-07-13 11:11:30,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 109 [2022-07-13 11:11:30,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,589 INFO L356 Elim1Store]: treesize reduction 66, result has 33.3 percent of original size [2022-07-13 11:11:30,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 43 [2022-07-13 11:11:30,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 91 [2022-07-13 11:11:30,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:30,770 INFO L356 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2022-07-13 11:11:30,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 140 [2022-07-13 11:11:30,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:30,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110913006] [2022-07-13 11:11:30,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:30,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336182777] [2022-07-13 11:11:30,775 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-13 11:11:30,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:30,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:11:30,975 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:164) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:764) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:725) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:643) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:335) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-13 11:11:30,978 INFO L158 Benchmark]: Toolchain (without parser) took 31975.13ms. Allocated memory was 138.4MB in the beginning and 201.3MB in the end (delta: 62.9MB). Free memory was 106.1MB in the beginning and 129.4MB in the end (delta: -23.2MB). Peak memory consumption was 40.4MB. Max. memory is 16.1GB. [2022-07-13 11:11:30,978 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 88.1MB. Free memory was 44.5MB in the beginning and 44.5MB in the end (delta: 40.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:11:30,979 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.06ms. Allocated memory is still 138.4MB. Free memory was 106.1MB in the beginning and 113.6MB in the end (delta: -7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 11:11:30,979 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.81ms. Allocated memory is still 138.4MB. Free memory was 113.6MB in the beginning and 112.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:11:30,979 INFO L158 Benchmark]: Boogie Preprocessor took 15.76ms. Allocated memory is still 138.4MB. Free memory was 112.3MB in the beginning and 110.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 11:11:30,979 INFO L158 Benchmark]: RCFGBuilder took 183.25ms. Allocated memory is still 138.4MB. Free memory was 110.7MB in the beginning and 99.7MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-13 11:11:30,979 INFO L158 Benchmark]: TraceAbstraction took 31553.56ms. Allocated memory was 138.4MB in the beginning and 201.3MB in the end (delta: 62.9MB). Free memory was 98.9MB in the beginning and 129.4MB in the end (delta: -30.5MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. [2022-07-13 11:11:30,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 88.1MB. Free memory was 44.5MB in the beginning and 44.5MB in the end (delta: 40.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.06ms. Allocated memory is still 138.4MB. Free memory was 106.1MB in the beginning and 113.6MB in the end (delta: -7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.81ms. Allocated memory is still 138.4MB. Free memory was 113.6MB in the beginning and 112.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.76ms. Allocated memory is still 138.4MB. Free memory was 112.3MB in the beginning and 110.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 183.25ms. Allocated memory is still 138.4MB. Free memory was 110.7MB in the beginning and 99.7MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 31553.56ms. Allocated memory was 138.4MB in the beginning and 201.3MB in the end (delta: 62.9MB). Free memory was 98.9MB in the beginning and 129.4MB in the end (delta: -30.5MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-13 11:11:31,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-fpi/nsqm.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:11:32,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:11:32,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:11:32,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:11:32,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:11:32,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:11:32,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:11:32,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:11:32,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:11:32,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:11:32,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:11:32,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:11:32,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:11:32,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:11:32,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:11:32,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:11:32,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:11:32,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:11:32,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:11:32,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:11:32,663 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:11:32,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:11:32,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:11:32,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:11:32,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:11:32,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:11:32,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:11:32,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:11:32,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:11:32,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:11:32,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:11:32,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:11:32,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:11:32,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:11:32,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:11:32,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:11:32,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:11:32,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:11:32,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:11:32,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:11:32,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:11:32,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:11:32,686 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-13 11:11:32,712 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:11:32,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:11:32,712 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:11:32,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:11:32,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:11:32,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:11:32,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:11:32,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:11:32,714 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:11:32,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:11:32,714 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:11:32,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:11:32,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:11:32,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:11:32,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:11:32,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:11:32,715 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 11:11:32,715 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 11:11:32,715 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 11:11:32,715 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:11:32,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:11:32,715 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:11:32,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:11:32,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:11:32,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:11:32,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:11:32,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:11:32,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:11:32,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:11:32,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:11:32,716 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 11:11:32,716 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 11:11:32,716 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:11:32,717 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:11:32,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:11:32,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 11:11:32,717 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 [2022-07-13 11:11:32,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:11:33,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:11:33,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:11:33,014 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:11:33,015 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:11:33,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm.c [2022-07-13 11:11:33,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ca5dfa00/5eeab57ee5e5430ba550feb7bc8d79ed/FLAG1571860f1 [2022-07-13 11:11:33,373 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:11:33,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c [2022-07-13 11:11:33,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ca5dfa00/5eeab57ee5e5430ba550feb7bc8d79ed/FLAG1571860f1 [2022-07-13 11:11:33,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ca5dfa00/5eeab57ee5e5430ba550feb7bc8d79ed [2022-07-13 11:11:33,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:11:33,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:11:33,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:11:33,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:11:33,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:11:33,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:33,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b5a03b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33, skipping insertion in model container [2022-07-13 11:11:33,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:33,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:11:33,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:11:33,907 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-fpi/nsqm.c[587,600] [2022-07-13 11:11:33,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:11:33,934 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:11:33,956 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-fpi/nsqm.c[587,600] [2022-07-13 11:11:33,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:11:33,982 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:11:33,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33 WrapperNode [2022-07-13 11:11:33,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:11:33,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:11:33,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:11:33,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:11:33,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:33,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:34,005 INFO L137 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-07-13 11:11:34,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:11:34,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:11:34,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:11:34,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:11:34,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:34,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:34,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:34,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:34,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:34,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:34,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:34,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:11:34,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:11:34,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:11:34,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:11:34,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33" (1/1) ... [2022-07-13 11:11:34,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:11:34,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:34,063 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) [2022-07-13 11:11:34,070 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 [2022-07-13 11:11:34,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:11:34,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 11:11:34,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-07-13 11:11:34,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:11:34,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:11:34,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:11:34,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-07-13 11:11:34,147 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:11:34,148 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:11:34,362 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:11:34,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:11:34,366 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 11:11:34,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:11:34 BoogieIcfgContainer [2022-07-13 11:11:34,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:11:34,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:11:34,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:11:34,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:11:34,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:11:33" (1/3) ... [2022-07-13 11:11:34,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f407f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:11:34, skipping insertion in model container [2022-07-13 11:11:34,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:33" (2/3) ... [2022-07-13 11:11:34,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f407f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:11:34, skipping insertion in model container [2022-07-13 11:11:34,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:11:34" (3/3) ... [2022-07-13 11:11:34,372 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm.c [2022-07-13 11:11:34,382 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:11:34,382 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:11:34,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:11:34,431 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@47a561b0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@25ec9280 [2022-07-13 11:11:34,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:11:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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) [2022-07-13 11:11:34,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 11:11:34,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:34,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:34,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2022-07-13 11:11:34,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:34,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506515088] [2022-07-13 11:11:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:34,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:34,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:34,460 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:34,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 11:11:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 11:11:34,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:34,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:11:34,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:34,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506515088] [2022-07-13 11:11:34,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506515088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:11:34,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:11:34,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:11:34,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218156169] [2022-07-13 11:11:34,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:11:34,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 11:11:34,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 11:11:34,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:11:34,590 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-07-13 11:11:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:34,602 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-07-13 11:11:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 11:11:34,603 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2022-07-13 11:11:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:34,608 INFO L225 Difference]: With dead ends: 38 [2022-07-13 11:11:34,609 INFO L226 Difference]: Without dead ends: 17 [2022-07-13 11:11:34,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:11:34,615 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2022-07-13 11:11:34,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:11:34,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-13 11:11:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-13 11:11:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-07-13 11:11:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-13 11:11:34,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-07-13 11:11:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:34,639 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-13 11:11:34,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-07-13 11:11:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-13 11:11:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 11:11:34,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:34,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:34,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:34,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:11:34,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2022-07-13 11:11:34,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:34,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020714884] [2022-07-13 11:11:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:34,853 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:34,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:34,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:34,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 11:11:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:34,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 11:11:35,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:35,194 INFO L356 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-07-13 11:11:35,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 100 [2022-07-13 11:11:35,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:35,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:35,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-13 11:11:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:35,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-13 11:11:35,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:35,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-07-13 11:11:35,576 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-13 11:11:35,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 34 [2022-07-13 11:11:35,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:35,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-07-13 11:11:35,840 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:11:35,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-07-13 11:11:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:35,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:11:35,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:35,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020714884] [2022-07-13 11:11:35,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020714884] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:11:35,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:11:35,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:11:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470215614] [2022-07-13 11:11:35,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:11:35,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:11:35,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:35,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:11:35,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:11:35,880 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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) [2022-07-13 11:11:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:36,538 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-07-13 11:11:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:11:36,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 12 [2022-07-13 11:11:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:36,539 INFO L225 Difference]: With dead ends: 35 [2022-07-13 11:11:36,539 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 11:11:36,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:11:36,540 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:36,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:11:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 11:11:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-13 11:11:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-07-13 11:11:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-07-13 11:11:36,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2022-07-13 11:11:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:36,544 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-07-13 11:11:36,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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) [2022-07-13 11:11:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-07-13 11:11:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 11:11:36,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:36,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:36,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:36,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:11:36,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:36,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:36,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2022-07-13 11:11:36,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:36,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353146496] [2022-07-13 11:11:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:36,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:36,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:36,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:36,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 11:11:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:11:36,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:37,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:37,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:37,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353146496] [2022-07-13 11:11:37,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353146496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:37,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:37,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2022-07-13 11:11:37,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206796294] [2022-07-13 11:11:37,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:37,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:11:37,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:37,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:11:37,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:11:37,154 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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) [2022-07-13 11:11:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:37,947 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-07-13 11:11:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:11:37,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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 14 [2022-07-13 11:11:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:37,956 INFO L225 Difference]: With dead ends: 47 [2022-07-13 11:11:37,956 INFO L226 Difference]: Without dead ends: 38 [2022-07-13 11:11:37,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2022-07-13 11:11:37,957 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 155 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:37,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 23 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:11:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-13 11:11:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2022-07-13 11:11:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2022-07-13 11:11:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-13 11:11:37,961 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-07-13 11:11:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:37,962 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-13 11:11:37,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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) [2022-07-13 11:11:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-13 11:11:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 11:11:37,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:37,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:37,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:38,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:11:38,170 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2022-07-13 11:11:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:38,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965842646] [2022-07-13 11:11:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:38,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:38,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:38,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:38,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 11:11:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:38,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 11:11:38,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:38,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-13 11:11:38,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:38,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-07-13 11:11:38,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:38,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:38,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-13 11:11:38,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-07-13 11:11:38,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:38,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:38,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:38,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:38,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:38,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:38,747 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:11:38,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 49 [2022-07-13 11:11:38,856 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:11:38,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-07-13 11:11:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:38,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:40,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:40,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965842646] [2022-07-13 11:11:40,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965842646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:40,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:40,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2022-07-13 11:11:40,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29485109] [2022-07-13 11:11:40,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:40,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 11:11:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 11:11:40,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-07-13 11:11:40,796 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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) [2022-07-13 11:11:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:42,932 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-07-13 11:11:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 11:11:42,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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 16 [2022-07-13 11:11:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:42,940 INFO L225 Difference]: With dead ends: 44 [2022-07-13 11:11:42,940 INFO L226 Difference]: Without dead ends: 35 [2022-07-13 11:11:42,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2022-07-13 11:11:42,942 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:42,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 65 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 146 Invalid, 0 Unknown, 26 Unchecked, 0.8s Time] [2022-07-13 11:11:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-13 11:11:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-07-13 11:11:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 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) [2022-07-13 11:11:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-07-13 11:11:42,947 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2022-07-13 11:11:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:42,947 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-07-13 11:11:42,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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) [2022-07-13 11:11:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-07-13 11:11:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 11:11:42,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:42,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:42,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:43,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:11:43,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 2 times [2022-07-13 11:11:43,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:43,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140922326] [2022-07-13 11:11:43,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:11:43,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:43,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:43,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:43,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 11:11:43,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:11:43,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:11:43,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 11:11:43,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:43,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:43,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:43,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140922326] [2022-07-13 11:11:43,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140922326] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:43,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:43,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2022-07-13 11:11:43,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182290225] [2022-07-13 11:11:43,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:43,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 11:11:43,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 11:11:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:11:43,802 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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) [2022-07-13 11:11:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:45,240 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-07-13 11:11:45,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 11:11:45,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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) Word has length 18 [2022-07-13 11:11:45,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:45,248 INFO L225 Difference]: With dead ends: 78 [2022-07-13 11:11:45,248 INFO L226 Difference]: Without dead ends: 69 [2022-07-13 11:11:45,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 11:11:45,249 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 167 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:45,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 61 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:11:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-13 11:11:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2022-07-13 11:11:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 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) [2022-07-13 11:11:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-07-13 11:11:45,256 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 18 [2022-07-13 11:11:45,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:45,256 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-07-13 11:11:45,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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) [2022-07-13 11:11:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-07-13 11:11:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 11:11:45,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:45,257 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:45,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:45,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:11:45,458 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:45,458 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2022-07-13 11:11:45,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:45,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477392679] [2022-07-13 11:11:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:45,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:45,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:45,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:45,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-13 11:11:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:45,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-13 11:11:45,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:45,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:45,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:45,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:45,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:45,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:45,867 INFO L356 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2022-07-13 11:11:45,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 45 [2022-07-13 11:11:45,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-13 11:11:46,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:46,020 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:11:46,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 78 [2022-07-13 11:11:46,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:46,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:46,369 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:11:46,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 85 [2022-07-13 11:11:46,973 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-13 11:11:46,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 89 [2022-07-13 11:11:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:47,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:52,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:52,412 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:52,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477392679] [2022-07-13 11:11:52,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477392679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:52,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:52,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2022-07-13 11:11:52,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829685905] [2022-07-13 11:11:52,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:52,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 11:11:52,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:52,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 11:11:52,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:11:52,414 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2022-07-13 11:11:58,201 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:11:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:59,080 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-07-13 11:11:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 11:11:59,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) Word has length 20 [2022-07-13 11:11:59,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:59,081 INFO L225 Difference]: With dead ends: 44 [2022-07-13 11:11:59,081 INFO L226 Difference]: Without dead ends: 31 [2022-07-13 11:11:59,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 11:11:59,082 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:59,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 61 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 108 Invalid, 0 Unknown, 43 Unchecked, 3.3s Time] [2022-07-13 11:11:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-13 11:11:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-13 11:11:59,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 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) [2022-07-13 11:11:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-13 11:11:59,087 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 20 [2022-07-13 11:11:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:59,087 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-13 11:11:59,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2022-07-13 11:11:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-13 11:11:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 11:11:59,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:59,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:59,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-13 11:11:59,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:11:59,291 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2022-07-13 11:11:59,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:59,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079978158] [2022-07-13 11:11:59,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:11:59,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:59,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:59,294 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:59,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-13 11:11:59,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 11:11:59,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:11:59,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 11:11:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:59,692 INFO L356 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-07-13 11:11:59,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 100 [2022-07-13 11:11:59,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:59,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:59,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-13 11:11:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:59,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:59,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-13 11:11:59,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 26 [2022-07-13 11:11:59,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:59,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-07-13 11:11:59,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-13 11:12:00,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-07-13 11:12:00,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-07-13 11:12:00,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,452 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:12:00,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 56 [2022-07-13 11:12:00,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:00,547 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:12:00,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 49 [2022-07-13 11:12:00,669 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:12:00,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-07-13 11:12:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:00,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:12:03,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:03,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:12:03,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079978158] [2022-07-13 11:12:03,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079978158] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:12:03,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:12:03,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2022-07-13 11:12:03,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871756299] [2022-07-13 11:12:03,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:12:03,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 11:12:03,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:12:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 11:12:03,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-07-13 11:12:03,715 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-07-13 11:12:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:10,012 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-07-13 11:12:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 11:12:10,021 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) Word has length 20 [2022-07-13 11:12:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:10,022 INFO L225 Difference]: With dead ends: 65 [2022-07-13 11:12:10,022 INFO L226 Difference]: Without dead ends: 63 [2022-07-13 11:12:10,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=353, Invalid=1287, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 11:12:10,024 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:12:10,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 92 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 171 Invalid, 0 Unknown, 113 Unchecked, 2.0s Time] [2022-07-13 11:12:10,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-13 11:12:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2022-07-13 11:12:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 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) [2022-07-13 11:12:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-07-13 11:12:10,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 20 [2022-07-13 11:12:10,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:10,030 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-07-13 11:12:10,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-07-13 11:12:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-07-13 11:12:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 11:12:10,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:10,031 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:10,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-13 11:12:10,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:10,241 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:10,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 2 times [2022-07-13 11:12:10,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:10,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706392548] [2022-07-13 11:12:10,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:12:10,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:10,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:10,242 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:12:10,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-13 11:12:10,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:12:10,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:12:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-13 11:12:10,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:10,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-13 11:12:10,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 43 [2022-07-13 11:12:10,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 40 [2022-07-13 11:12:10,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-13 11:12:10,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-07-13 11:12:10,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:10,760 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:12:10,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 78 [2022-07-13 11:12:10,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:10,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:10,868 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:12:10,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 78 [2022-07-13 11:12:11,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:11,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:11,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:11,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:11,194 INFO L356 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-07-13 11:12:11,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 166 treesize of output 147 [2022-07-13 11:12:11,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:11,503 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:12:11,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 127 treesize of output 109 [2022-07-13 11:12:12,116 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-13 11:12:12,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 73 [2022-07-13 11:12:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:12,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:12:21,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:21,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:21,941 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-07-13 11:12:21,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 508 treesize of output 1 [2022-07-13 11:12:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:21,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:12:21,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706392548] [2022-07-13 11:12:21,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706392548] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:12:21,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:12:21,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-07-13 11:12:21,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678645984] [2022-07-13 11:12:21,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:12:21,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 11:12:21,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:12:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 11:12:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-07-13 11:12:21,946 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 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) [2022-07-13 11:12:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:31,039 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2022-07-13 11:12:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 11:12:31,041 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 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 24 [2022-07-13 11:12:31,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:31,042 INFO L225 Difference]: With dead ends: 72 [2022-07-13 11:12:31,042 INFO L226 Difference]: Without dead ends: 70 [2022-07-13 11:12:31,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 11:12:31,044 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:12:31,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 110 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 128 Invalid, 0 Unknown, 125 Unchecked, 2.2s Time] [2022-07-13 11:12:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-13 11:12:31,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2022-07-13 11:12:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 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) [2022-07-13 11:12:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-07-13 11:12:31,059 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 24 [2022-07-13 11:12:31,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:31,059 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-07-13 11:12:31,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 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) [2022-07-13 11:12:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-07-13 11:12:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 11:12:31,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:31,060 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:31,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:12:31,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:31,265 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:31,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:31,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2022-07-13 11:12:31,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:31,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951755564] [2022-07-13 11:12:31,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:12:31,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:31,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:31,267 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:12:31,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-13 11:12:31,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:12:31,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:12:31,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 11:12:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:31,735 INFO L356 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-07-13 11:12:31,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 100 [2022-07-13 11:12:31,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:31,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-13 11:12:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:31,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-13 11:12:31,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:31,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2022-07-13 11:12:31,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:31,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-07-13 11:12:31,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-13 11:12:31,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-07-13 11:12:32,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-07-13 11:12:32,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-07-13 11:12:32,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,463 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:12:32,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 56 [2022-07-13 11:12:32,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,555 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:12:32,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 56 [2022-07-13 11:12:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:32,644 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:12:32,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 49 [2022-07-13 11:12:32,762 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:12:32,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-07-13 11:12:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:32,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:12:38,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:38,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:12:38,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951755564] [2022-07-13 11:12:38,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951755564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:12:38,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:12:38,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2022-07-13 11:12:38,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835052357] [2022-07-13 11:12:38,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:12:38,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 11:12:38,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:12:38,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 11:12:38,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-07-13 11:12:38,400 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 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) [2022-07-13 11:12:43,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:12:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:47,162 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2022-07-13 11:12:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 11:12:47,172 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 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 24 [2022-07-13 11:12:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:47,173 INFO L225 Difference]: With dead ends: 103 [2022-07-13 11:12:47,173 INFO L226 Difference]: Without dead ends: 101 [2022-07-13 11:12:47,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=498, Invalid=1951, Unknown=1, NotChecked=0, Total=2450 [2022-07-13 11:12:47,174 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:12:47,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 125 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 300 Invalid, 0 Unknown, 276 Unchecked, 3.9s Time] [2022-07-13 11:12:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-13 11:12:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2022-07-13 11:12:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 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) [2022-07-13 11:12:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-13 11:12:47,189 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 24 [2022-07-13 11:12:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:47,189 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-13 11:12:47,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 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) [2022-07-13 11:12:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-13 11:12:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 11:12:47,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:47,190 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:47,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-13 11:12:47,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:47,393 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:47,394 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 3 times [2022-07-13 11:12:47,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:47,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478584372] [2022-07-13 11:12:47,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:12:47,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:47,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:47,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:12:47,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-13 11:12:47,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 11:12:47,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:12:47,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-13 11:12:47,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:48,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-13 11:12:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-07-13 11:12:48,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,145 INFO L356 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-07-13 11:12:48,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 122 treesize of output 117 [2022-07-13 11:12:48,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,397 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:12:48,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 114 treesize of output 112 [2022-07-13 11:12:48,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:48,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:48,814 INFO L356 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2022-07-13 11:12:48,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 47 case distinctions, treesize of input 222 treesize of output 186 [2022-07-13 11:12:49,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:49,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:49,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:49,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:49,337 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-07-13 11:12:49,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 223 treesize of output 155 [2022-07-13 11:12:52,042 INFO L356 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-07-13 11:12:52,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 269 treesize of output 153 [2022-07-13 11:12:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:52,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:13:36,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:13:36,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:13:36,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478584372] [2022-07-13 11:13:36,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478584372] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:13:36,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:13:36,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-07-13 11:13:36,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448442540] [2022-07-13 11:13:36,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:13:36,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 11:13:36,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:13:36,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 11:13:36,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=916, Unknown=2, NotChecked=0, Total=1122 [2022-07-13 11:13:36,341 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 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) [2022-07-13 11:14:06,616 WARN L233 SmtUtils]: Spent 11.64s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 11:14:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:14:31,788 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2022-07-13 11:14:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 11:14:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 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 28 [2022-07-13 11:14:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:14:31,792 INFO L225 Difference]: With dead ends: 90 [2022-07-13 11:14:31,792 INFO L226 Difference]: Without dead ends: 88 [2022-07-13 11:14:31,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 97.1s TimeCoverageRelationStatistics Valid=449, Invalid=2197, Unknown=6, NotChecked=0, Total=2652 [2022-07-13 11:14:31,793 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:14:31,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 94 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 48 Invalid, 0 Unknown, 45 Unchecked, 1.1s Time] [2022-07-13 11:14:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-13 11:14:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2022-07-13 11:14:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 79 states have internal predecessors, (91), 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) [2022-07-13 11:14:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-07-13 11:14:31,810 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 28 [2022-07-13 11:14:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:14:31,810 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-07-13 11:14:31,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 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) [2022-07-13 11:14:31,811 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-07-13 11:14:31,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 11:14:31,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:14:31,811 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:14:31,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-13 11:14:32,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:14:32,016 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:14:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:14:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash 48972360, now seen corresponding path program 4 times [2022-07-13 11:14:32,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:14:32,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818763212] [2022-07-13 11:14:32,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:14:32,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:14:32,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:14:32,018 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:14:32,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-13 11:14:32,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:14:32,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:14:32,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-13 11:14:32,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:14:32,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:32,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:32,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:32,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:32,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:32,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:32,793 INFO L356 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2022-07-13 11:14:32,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 45 [2022-07-13 11:14:32,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-13 11:14:33,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:33,029 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:14:33,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 78 [2022-07-13 11:14:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:33,291 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:14:33,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 78 [2022-07-13 11:14:33,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:33,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:33,558 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:14:33,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 78 [2022-07-13 11:14:34,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:34,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:34,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:34,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:34,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:34,093 INFO L356 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-07-13 11:14:34,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 166 treesize of output 147 [2022-07-13 11:14:34,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:34,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:34,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:34,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:34,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:34,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,628 INFO L356 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-07-13 11:14:34,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 195 treesize of output 182 [2022-07-13 11:14:34,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:34,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:34,954 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:14:34,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 127 treesize of output 109 [2022-07-13 11:14:35,876 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-13 11:14:35,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 73 [2022-07-13 11:14:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:14:35,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:14:58,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:14:58,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:14:58,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818763212] [2022-07-13 11:14:58,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818763212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:14:58,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:14:58,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-07-13 11:14:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195722932] [2022-07-13 11:14:58,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:14:58,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-13 11:14:58,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:14:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-13 11:14:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1037, Unknown=2, NotChecked=0, Total=1260 [2022-07-13 11:14:58,349 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 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)