./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-patterns/array4_pattern.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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:49:51,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:49:51,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:49:51,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:49:51,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:49:51,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:49:51,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:49:51,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:49:51,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:49:51,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:49:51,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:49:51,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:49:51,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:49:51,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:49:51,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:49:51,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:49:51,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:49:51,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:49:51,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:49:51,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:49:51,219 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:49:51,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:49:51,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:49:51,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:49:51,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:49:51,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:49:51,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:49:51,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:49:51,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:49:51,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:49:51,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:49:51,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:49:51,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:49:51,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:49:51,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:49:51,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:49:51,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:49:51,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:49:51,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:49:51,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:49:51,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:49:51,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:49:51,236 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:49:51,262 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:49:51,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:49:51,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:49:51,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:49:51,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:49:51,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:49:51,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:49:51,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:49:51,270 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:49:51,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:49:51,271 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:49:51,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:49:51,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:49:51,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:49:51,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:49:51,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:49:51,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:49:51,273 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:49:51,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:49:51,273 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:49:51,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:49:51,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:49:51,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:49:51,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:49:51,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:49:51,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:49:51,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:49:51,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:49:51,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:49:51,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:49:51,276 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:49:51,276 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:49:51,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:49:51,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2022-07-20 21:49:51,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:49:51,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:49:51,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:49:51,553 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:49:51,555 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:49:51,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2022-07-20 21:49:51,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3cfece42/e2342650b7ab474088fd13f0c8681edf/FLAG2ace2120d [2022-07-20 21:49:52,004 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:49:52,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2022-07-20 21:49:52,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3cfece42/e2342650b7ab474088fd13f0c8681edf/FLAG2ace2120d [2022-07-20 21:49:52,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3cfece42/e2342650b7ab474088fd13f0c8681edf [2022-07-20 21:49:52,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:49:52,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:49:52,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:49:52,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:49:52,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:49:52,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ee9b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52, skipping insertion in model container [2022-07-20 21:49:52,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:49:52,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:49:52,620 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-patterns/array4_pattern.c[1835,1848] [2022-07-20 21:49:52,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:49:52,661 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:49:52,677 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-patterns/array4_pattern.c[1835,1848] [2022-07-20 21:49:52,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:49:52,702 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:49:52,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52 WrapperNode [2022-07-20 21:49:52,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:49:52,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:49:52,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:49:52,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:49:52,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,734 INFO L137 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2022-07-20 21:49:52,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:49:52,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:49:52,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:49:52,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:49:52,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:49:52,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:49:52,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:49:52,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:49:52,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52" (1/1) ... [2022-07-20 21:49:52,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:49:52,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:49:52,832 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) [2022-07-20 21:49:52,841 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 [2022-07-20 21:49:52,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:49:52,865 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-20 21:49:52,866 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-20 21:49:52,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:49:52,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:49:52,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:49:52,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:49:52,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:49:52,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:49:52,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:49:52,923 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:49:52,924 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:49:53,042 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:49:53,047 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:49:53,047 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 21:49:53,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:53 BoogieIcfgContainer [2022-07-20 21:49:53,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:49:53,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:49:53,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:49:53,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:49:53,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:49:52" (1/3) ... [2022-07-20 21:49:53,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd1d8a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:53, skipping insertion in model container [2022-07-20 21:49:53,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:52" (2/3) ... [2022-07-20 21:49:53,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd1d8a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:53, skipping insertion in model container [2022-07-20 21:49:53,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:53" (3/3) ... [2022-07-20 21:49:53,057 INFO L111 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2022-07-20 21:49:53,069 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:49:53,070 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:49:53,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:49:53,126 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@51016fb1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5eeb2fff [2022-07-20 21:49:53,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:49:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:49:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 21:49:53,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:49:53,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:49:53,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:49:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:49:53,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2022-07-20 21:49:53,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:49:53,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658108519] [2022-07-20 21:49:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:49:53,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:49:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:49:53,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:49:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:49:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:49:53,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:49:53,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658108519] [2022-07-20 21:49:53,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658108519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:49:53,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:49:53,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:49:53,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388618864] [2022-07-20 21:49:53,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:49:53,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:49:53,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:49:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:49:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:49:53,379 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 21:49:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:49:53,405 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2022-07-20 21:49:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:49:53,407 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-20 21:49:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:49:53,412 INFO L225 Difference]: With dead ends: 63 [2022-07-20 21:49:53,413 INFO L226 Difference]: Without dead ends: 29 [2022-07-20 21:49:53,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:49:53,423 INFO L413 NwaCegarLoop]: 40 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, 40 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 [2022-07-20 21:49:53,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:49:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-20 21:49:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-20 21:49:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:49:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-07-20 21:49:53,462 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2022-07-20 21:49:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:49:53,463 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-07-20 21:49:53,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 21:49:53,464 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-07-20 21:49:53,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:49:53,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:49:53,468 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:49:53,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:49:53,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:49:53,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:49:53,470 INFO L85 PathProgramCache]: Analyzing trace with hash -852430543, now seen corresponding path program 1 times [2022-07-20 21:49:53,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:49:53,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287403105] [2022-07-20 21:49:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:49:53,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:49:53,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:49:53,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684103803] [2022-07-20 21:49:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:49:53,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:49:53,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:49:53,563 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) [2022-07-20 21:49:53,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:49:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:49:53,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:49:53,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:49:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:49:53,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:49:53,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:49:53,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287403105] [2022-07-20 21:49:53,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:49:53,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684103803] [2022-07-20 21:49:53,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684103803] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:49:53,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:49:53,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:49:53,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230726639] [2022-07-20 21:49:53,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:49:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:49:53,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:49:53,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:49:53,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:49:53,783 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:49:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:49:53,852 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2022-07-20 21:49:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:49:53,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-07-20 21:49:53,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:49:53,858 INFO L225 Difference]: With dead ends: 70 [2022-07-20 21:49:53,859 INFO L226 Difference]: Without dead ends: 48 [2022-07-20 21:49:53,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:49:53,862 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:49:53,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:49:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-20 21:49:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-07-20 21:49:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 21:49:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-07-20 21:49:53,881 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2022-07-20 21:49:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:49:53,883 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-07-20 21:49:53,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:49:53,884 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-07-20 21:49:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:49:53,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:49:53,886 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:49:53,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 21:49:54,099 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 [2022-07-20 21:49:54,100 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:49:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:49:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1661777169, now seen corresponding path program 1 times [2022-07-20 21:49:54,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:49:54,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731933853] [2022-07-20 21:49:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:49:54,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:49:54,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:49:54,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716464440] [2022-07-20 21:49:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:49:54,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:49:54,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:49:54,146 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) [2022-07-20 21:49:54,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:49:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:49:54,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 21:49:54,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:49:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:49:54,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:49:54,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:49:54,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731933853] [2022-07-20 21:49:54,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:49:54,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716464440] [2022-07-20 21:49:54,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716464440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:49:54,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:49:54,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:49:54,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570774724] [2022-07-20 21:49:54,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:49:54,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:49:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:49:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:49:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:49:54,289 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:49:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:49:54,307 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-07-20 21:49:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:49:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-07-20 21:49:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:49:54,309 INFO L225 Difference]: With dead ends: 43 [2022-07-20 21:49:54,309 INFO L226 Difference]: Without dead ends: 39 [2022-07-20 21:49:54,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:49:54,310 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:49:54,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:49:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-20 21:49:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-20 21:49:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 21:49:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-07-20 21:49:54,319 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2022-07-20 21:49:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:49:54,319 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-07-20 21:49:54,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:49:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-07-20 21:49:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 21:49:54,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:49:54,321 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:49:54,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:49:54,527 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 [2022-07-20 21:49:54,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:49:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:49:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash 813208561, now seen corresponding path program 1 times [2022-07-20 21:49:54,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:49:54,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635496503] [2022-07-20 21:49:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:49:54,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:49:54,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:49:54,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264507485] [2022-07-20 21:49:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:49:54,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:49:54,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:49:54,569 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) [2022-07-20 21:49:54,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:49:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:49:54,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:49:54,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:49:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:49:54,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:49:54,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:49:54,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635496503] [2022-07-20 21:49:54,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:49:54,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264507485] [2022-07-20 21:49:54,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264507485] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:49:54,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:49:54,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 21:49:54,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893692767] [2022-07-20 21:49:54,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:49:54,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 21:49:54,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:49:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 21:49:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:49:54,764 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:49:54,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:49:54,875 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-07-20 21:49:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:49:54,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-07-20 21:49:54,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:49:54,877 INFO L225 Difference]: With dead ends: 77 [2022-07-20 21:49:54,877 INFO L226 Difference]: Without dead ends: 43 [2022-07-20 21:49:54,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:49:54,878 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:49:54,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:49:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-20 21:49:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-07-20 21:49:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 21:49:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-07-20 21:49:54,885 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2022-07-20 21:49:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:49:54,886 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-07-20 21:49:54,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:49:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-07-20 21:49:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 21:49:54,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:49:54,887 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:49:54,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:49:55,103 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 [2022-07-20 21:49:55,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:49:55,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:49:55,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1843316237, now seen corresponding path program 1 times [2022-07-20 21:49:55,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:49:55,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212470545] [2022-07-20 21:49:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:49:55,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:49:55,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:49:55,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401771127] [2022-07-20 21:49:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:49:55,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:49:55,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:49:55,150 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) [2022-07-20 21:49:55,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:49:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:49:55,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 21:49:55,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:49:55,254 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 [2022-07-20 21:49:55,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:49:55,301 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 18 treesize of output 18 [2022-07-20 21:49:55,306 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 12 treesize of output 11 [2022-07-20 21:49:56,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:49:56,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 26 [2022-07-20 21:49:56,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:49:56,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:49:56,328 INFO L356 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-07-20 21:49:56,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 24 [2022-07-20 21:49:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:49:56,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:01,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:01,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212470545] [2022-07-20 21:50:01,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:01,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401771127] [2022-07-20 21:50:01,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401771127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:50:01,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:50:01,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-20 21:50:01,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768226984] [2022-07-20 21:50:01,793 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:01,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:50:01,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:01,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:50:01,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=453, Unknown=4, NotChecked=0, Total=552 [2022-07-20 21:50:01,795 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 21:50:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:02,037 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-07-20 21:50:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 21:50:02,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2022-07-20 21:50:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:02,039 INFO L225 Difference]: With dead ends: 79 [2022-07-20 21:50:02,039 INFO L226 Difference]: Without dead ends: 75 [2022-07-20 21:50:02,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=124, Invalid=628, Unknown=4, NotChecked=0, Total=756 [2022-07-20 21:50:02,040 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:02,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 254 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 157 Unchecked, 0.1s Time] [2022-07-20 21:50:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-20 21:50:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2022-07-20 21:50:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 21:50:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2022-07-20 21:50:02,062 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 46 [2022-07-20 21:50:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:02,063 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2022-07-20 21:50:02,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 21:50:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2022-07-20 21:50:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:50:02,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:02,068 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:02,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:50:02,284 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 [2022-07-20 21:50:02,284 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:02,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1847143947, now seen corresponding path program 2 times [2022-07-20 21:50:02,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:02,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459149581] [2022-07-20 21:50:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:02,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:02,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:02,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156720373] [2022-07-20 21:50:02,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:50:02,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:02,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:02,325 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) [2022-07-20 21:50:02,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:50:02,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:50:02,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:50:02,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:50:02,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:50:02,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:50:02,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:02,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459149581] [2022-07-20 21:50:02,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:02,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156720373] [2022-07-20 21:50:02,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156720373] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:50:02,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:50:02,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-20 21:50:02,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696374447] [2022-07-20 21:50:02,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:02,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 21:50:02,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 21:50:02,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:50:02,547 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:02,757 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2022-07-20 21:50:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 21:50:02,757 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2022-07-20 21:50:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:02,759 INFO L225 Difference]: With dead ends: 150 [2022-07-20 21:50:02,759 INFO L226 Difference]: Without dead ends: 123 [2022-07-20 21:50:02,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:50:02,760 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 79 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:02,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 185 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:50:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-20 21:50:02,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2022-07-20 21:50:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-20 21:50:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2022-07-20 21:50:02,779 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 48 [2022-07-20 21:50:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:02,780 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2022-07-20 21:50:02,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2022-07-20 21:50:02,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:50:02,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:02,787 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:02,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:50:03,010 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 [2022-07-20 21:50:03,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:03,011 INFO L85 PathProgramCache]: Analyzing trace with hash 741894005, now seen corresponding path program 3 times [2022-07-20 21:50:03,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:03,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132763472] [2022-07-20 21:50:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:03,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:03,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:03,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281964033] [2022-07-20 21:50:03,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:50:03,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:03,054 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) [2022-07-20 21:50:03,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:50:03,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 21:50:03,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:50:03,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 21:50:03,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:03,150 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 [2022-07-20 21:50:03,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:03,629 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 40 [2022-07-20 21:50:03,639 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 12 treesize of output 11 [2022-07-20 21:50:03,645 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 38 treesize of output 29 [2022-07-20 21:50:03,886 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:50:03,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 41 [2022-07-20 21:50:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 21:50:04,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:04,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132763472] [2022-07-20 21:50:04,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281964033] [2022-07-20 21:50:04,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281964033] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:50:04,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:50:04,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-20 21:50:04,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832457219] [2022-07-20 21:50:04,402 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:04,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 21:50:04,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:04,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 21:50:04,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=478, Unknown=1, NotChecked=0, Total=600 [2022-07-20 21:50:04,404 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:50:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:04,810 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2022-07-20 21:50:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 21:50:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2022-07-20 21:50:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:04,814 INFO L225 Difference]: With dead ends: 136 [2022-07-20 21:50:04,814 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 21:50:04,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=894, Unknown=1, NotChecked=0, Total=1122 [2022-07-20 21:50:04,815 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:04,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 124 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 204 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2022-07-20 21:50:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 21:50:04,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-07-20 21:50:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 91 states have internal predecessors, (99), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-20 21:50:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 157 transitions. [2022-07-20 21:50:04,834 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 157 transitions. Word has length 48 [2022-07-20 21:50:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:04,834 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 157 transitions. [2022-07-20 21:50:04,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:50:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 157 transitions. [2022-07-20 21:50:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 21:50:04,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:04,836 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:04,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:50:05,059 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 [2022-07-20 21:50:05,060 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:05,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:05,060 INFO L85 PathProgramCache]: Analyzing trace with hash 48801527, now seen corresponding path program 4 times [2022-07-20 21:50:05,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:05,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431378075] [2022-07-20 21:50:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:05,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:05,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:05,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103939181] [2022-07-20 21:50:05,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:50:05,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:05,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:05,091 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) [2022-07-20 21:50:05,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:50:05,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:50:05,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:50:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-20 21:50:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:05,207 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 [2022-07-20 21:50:05,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:05,226 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 27 treesize of output 31 [2022-07-20 21:50:05,240 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 28 treesize of output 28 [2022-07-20 21:50:05,245 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 12 treesize of output 11 [2022-07-20 21:50:05,251 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 12 treesize of output 11 [2022-07-20 21:50:05,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:05,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:05,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 64 treesize of output 53 [2022-07-20 21:50:07,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:07,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:07,718 INFO L356 Elim1Store]: treesize reduction 114, result has 42.1 percent of original size [2022-07-20 21:50:07,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 117 [2022-07-20 21:50:09,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:09,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:50:09,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:09,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:50:09,405 INFO L356 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2022-07-20 21:50:09,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 140 treesize of output 72 [2022-07-20 21:50:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:50:09,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:14,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431378075] [2022-07-20 21:50:14,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103939181] [2022-07-20 21:50:14,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103939181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:50:14,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:50:14,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-20 21:50:14,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791806185] [2022-07-20 21:50:14,637 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:14,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 21:50:14,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 21:50:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1070, Unknown=1, NotChecked=0, Total=1260 [2022-07-20 21:50:14,638 INFO L87 Difference]: Start difference. First operand 126 states and 157 transitions. Second operand has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 21:50:14,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:14,786 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-07-20 21:50:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:50:14,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2022-07-20 21:50:14,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:14,788 INFO L225 Difference]: With dead ends: 160 [2022-07-20 21:50:14,788 INFO L226 Difference]: Without dead ends: 156 [2022-07-20 21:50:14,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=196, Invalid=1135, Unknown=1, NotChecked=0, Total=1332 [2022-07-20 21:50:14,790 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 32 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:14,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 392 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 312 Unchecked, 0.1s Time] [2022-07-20 21:50:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-20 21:50:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2022-07-20 21:50:14,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 110 states have internal predecessors, (120), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-20 21:50:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2022-07-20 21:50:14,808 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 50 [2022-07-20 21:50:14,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:14,808 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2022-07-20 21:50:14,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 21:50:14,809 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2022-07-20 21:50:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 21:50:14,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:14,810 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:14,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:50:15,027 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 [2022-07-20 21:50:15,028 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash -293138951, now seen corresponding path program 5 times [2022-07-20 21:50:15,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:15,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705882357] [2022-07-20 21:50:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:15,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:15,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:15,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836493215] [2022-07-20 21:50:15,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:50:15,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:15,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:15,069 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) [2022-07-20 21:50:15,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:50:15,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 21:50:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:50:15,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:50:15,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:50:15,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:50:15,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:15,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705882357] [2022-07-20 21:50:15,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:15,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836493215] [2022-07-20 21:50:15,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836493215] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:50:15,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:50:15,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-20 21:50:15,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135188245] [2022-07-20 21:50:15,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:15,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 21:50:15,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 21:50:15,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:50:15,307 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:15,823 INFO L93 Difference]: Finished difference Result 330 states and 412 transitions. [2022-07-20 21:50:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:50:15,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2022-07-20 21:50:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:15,825 INFO L225 Difference]: With dead ends: 330 [2022-07-20 21:50:15,825 INFO L226 Difference]: Without dead ends: 252 [2022-07-20 21:50:15,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:50:15,827 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 196 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:15,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 212 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 21:50:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-20 21:50:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 218. [2022-07-20 21:50:15,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 151 states have (on average 1.119205298013245) internal successors, (169), 154 states have internal predecessors, (169), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-20 21:50:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 279 transitions. [2022-07-20 21:50:15,850 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 279 transitions. Word has length 52 [2022-07-20 21:50:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:15,850 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 279 transitions. [2022-07-20 21:50:15,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 279 transitions. [2022-07-20 21:50:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 21:50:15,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:15,852 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:15,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:50:16,067 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 [2022-07-20 21:50:16,067 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:16,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:16,067 INFO L85 PathProgramCache]: Analyzing trace with hash 986268537, now seen corresponding path program 6 times [2022-07-20 21:50:16,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:16,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462300545] [2022-07-20 21:50:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:16,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:16,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:16,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450070848] [2022-07-20 21:50:16,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:50:16,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:16,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:16,108 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) [2022-07-20 21:50:16,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:50:16,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 21:50:16,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:50:16,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:50:16,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:50:16,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:50:16,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:16,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462300545] [2022-07-20 21:50:16,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:16,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450070848] [2022-07-20 21:50:16,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450070848] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:50:16,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:50:16,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-20 21:50:16,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836070618] [2022-07-20 21:50:16,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:16,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 21:50:16,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:16,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 21:50:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:50:16,411 INFO L87 Difference]: Start difference. First operand 218 states and 279 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:18,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-07-20 21:50:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:18,440 INFO L93 Difference]: Finished difference Result 247 states and 306 transitions. [2022-07-20 21:50:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:50:18,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2022-07-20 21:50:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:18,443 INFO L225 Difference]: With dead ends: 247 [2022-07-20 21:50:18,443 INFO L226 Difference]: Without dead ends: 243 [2022-07-20 21:50:18,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:50:18,444 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 78 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:18,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 301 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 21:50:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-20 21:50:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 223. [2022-07-20 21:50:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 158 states have internal predecessors, (173), 55 states have call successors, (55), 12 states have call predecessors, (55), 12 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-20 21:50:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 283 transitions. [2022-07-20 21:50:18,478 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 283 transitions. Word has length 52 [2022-07-20 21:50:18,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:18,478 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 283 transitions. [2022-07-20 21:50:18,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:18,479 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 283 transitions. [2022-07-20 21:50:18,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 21:50:18,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:18,480 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:18,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-20 21:50:18,707 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 [2022-07-20 21:50:18,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1330474501, now seen corresponding path program 7 times [2022-07-20 21:50:18,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:18,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775281622] [2022-07-20 21:50:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:18,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:18,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:18,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939646470] [2022-07-20 21:50:18,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:50:18,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:18,735 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) [2022-07-20 21:50:18,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:50:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:50:18,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-20 21:50:18,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:18,900 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 [2022-07-20 21:50:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:18,922 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 27 treesize of output 31 [2022-07-20 21:50:18,926 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 28 treesize of output 28 [2022-07-20 21:50:18,931 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 12 treesize of output 11 [2022-07-20 21:50:18,935 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 12 treesize of output 11 [2022-07-20 21:50:19,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:19,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:19,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 64 treesize of output 53 [2022-07-20 21:50:19,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:19,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:19,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:19,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:19,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:19,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:19,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-07-20 21:50:23,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:23,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:23,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:23,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:23,881 INFO L356 Elim1Store]: treesize reduction 132, result has 39.7 percent of original size [2022-07-20 21:50:23,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 127 [2022-07-20 21:50:24,795 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-07-20 21:50:24,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 169 treesize of output 85 [2022-07-20 21:50:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 21:50:24,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:27,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775281622] [2022-07-20 21:50:27,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:27,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939646470] [2022-07-20 21:50:27,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939646470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:50:27,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:50:27,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-20 21:50:27,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027237448] [2022-07-20 21:50:27,430 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:27,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-20 21:50:27,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:27,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-20 21:50:27,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1103, Unknown=5, NotChecked=0, Total=1260 [2022-07-20 21:50:27,431 INFO L87 Difference]: Start difference. First operand 223 states and 283 transitions. Second operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 21:50:28,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:28,420 INFO L93 Difference]: Finished difference Result 266 states and 334 transitions. [2022-07-20 21:50:28,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 21:50:28,421 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 54 [2022-07-20 21:50:28,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:28,426 INFO L225 Difference]: With dead ends: 266 [2022-07-20 21:50:28,427 INFO L226 Difference]: Without dead ends: 262 [2022-07-20 21:50:28,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=197, Invalid=1520, Unknown=5, NotChecked=0, Total=1722 [2022-07-20 21:50:28,429 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 40 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:28,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 367 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 851 Invalid, 0 Unknown, 83 Unchecked, 0.8s Time] [2022-07-20 21:50:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-20 21:50:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2022-07-20 21:50:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 174 states have (on average 1.1149425287356323) internal successors, (194), 177 states have internal predecessors, (194), 59 states have call successors, (59), 14 states have call predecessors, (59), 14 states have return successors, (59), 56 states have call predecessors, (59), 59 states have call successors, (59) [2022-07-20 21:50:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 312 transitions. [2022-07-20 21:50:28,466 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 312 transitions. Word has length 54 [2022-07-20 21:50:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:28,466 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 312 transitions. [2022-07-20 21:50:28,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 21:50:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 312 transitions. [2022-07-20 21:50:28,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 21:50:28,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:28,468 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:28,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:50:28,694 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 [2022-07-20 21:50:28,694 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:28,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:28,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1367492605, now seen corresponding path program 8 times [2022-07-20 21:50:28,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:28,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921136320] [2022-07-20 21:50:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:28,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:28,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:28,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711999196] [2022-07-20 21:50:28,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:50:28,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:28,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:28,724 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) [2022-07-20 21:50:28,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:50:28,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:50:28,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:50:28,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 21:50:28,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:50:28,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:50:28,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921136320] [2022-07-20 21:50:28,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711999196] [2022-07-20 21:50:28,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711999196] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:50:28,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:50:28,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-20 21:50:28,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958191093] [2022-07-20 21:50:28,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:28,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 21:50:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 21:50:28,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:50:28,970 INFO L87 Difference]: Start difference. First operand 248 states and 312 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:29,488 INFO L93 Difference]: Finished difference Result 544 states and 693 transitions. [2022-07-20 21:50:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:50:29,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-07-20 21:50:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:29,491 INFO L225 Difference]: With dead ends: 544 [2022-07-20 21:50:29,491 INFO L226 Difference]: Without dead ends: 393 [2022-07-20 21:50:29,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2022-07-20 21:50:29,493 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 292 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:29,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 306 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 21:50:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-20 21:50:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 338. [2022-07-20 21:50:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 232 states have (on average 1.1163793103448276) internal successors, (259), 236 states have internal predecessors, (259), 89 states have call successors, (89), 16 states have call predecessors, (89), 16 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2022-07-20 21:50:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 437 transitions. [2022-07-20 21:50:29,529 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 437 transitions. Word has length 56 [2022-07-20 21:50:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:29,529 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 437 transitions. [2022-07-20 21:50:29,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 437 transitions. [2022-07-20 21:50:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 21:50:29,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:29,531 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:29,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-20 21:50:29,747 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 [2022-07-20 21:50:29,747 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525379, now seen corresponding path program 9 times [2022-07-20 21:50:29,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:29,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484567964] [2022-07-20 21:50:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:29,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:29,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396937542] [2022-07-20 21:50:29,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:50:29,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:29,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:29,785 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) [2022-07-20 21:50:29,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:50:29,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-20 21:50:29,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:50:29,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 21:50:29,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:50:30,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:50:30,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:30,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484567964] [2022-07-20 21:50:30,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:30,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396937542] [2022-07-20 21:50:30,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396937542] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:50:30,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:50:30,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-20 21:50:30,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464729871] [2022-07-20 21:50:30,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:30,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 21:50:30,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:30,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 21:50:30,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:50:30,137 INFO L87 Difference]: Start difference. First operand 338 states and 437 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:30,802 INFO L93 Difference]: Finished difference Result 372 states and 468 transitions. [2022-07-20 21:50:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:50:30,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-07-20 21:50:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:30,804 INFO L225 Difference]: With dead ends: 372 [2022-07-20 21:50:30,804 INFO L226 Difference]: Without dead ends: 368 [2022-07-20 21:50:30,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:50:30,805 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 125 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:30,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 310 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 21:50:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-20 21:50:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 340. [2022-07-20 21:50:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 234 states have (on average 1.1153846153846154) internal successors, (261), 238 states have internal predecessors, (261), 89 states have call successors, (89), 16 states have call predecessors, (89), 16 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2022-07-20 21:50:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 439 transitions. [2022-07-20 21:50:30,841 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 439 transitions. Word has length 56 [2022-07-20 21:50:30,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:30,841 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 439 transitions. [2022-07-20 21:50:30,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:30,842 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 439 transitions. [2022-07-20 21:50:30,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 21:50:30,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:30,843 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:30,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:50:31,056 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 [2022-07-20 21:50:31,056 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1248328447, now seen corresponding path program 10 times [2022-07-20 21:50:31,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:31,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000831812] [2022-07-20 21:50:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:31,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:31,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:31,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372288803] [2022-07-20 21:50:31,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:50:31,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:31,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:31,072 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) [2022-07-20 21:50:31,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:50:31,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:50:31,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:50:31,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 118 conjunts are in the unsatisfiable core [2022-07-20 21:50:31,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:31,261 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 [2022-07-20 21:50:31,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,284 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 27 treesize of output 31 [2022-07-20 21:50:31,288 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 12 treesize of output 11 [2022-07-20 21:50:31,292 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 26 [2022-07-20 21:50:31,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 64 treesize of output 53 [2022-07-20 21:50:31,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-07-20 21:50:31,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:31,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2022-07-20 21:50:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:32,999 INFO L356 Elim1Store]: treesize reduction 180, result has 39.4 percent of original size [2022-07-20 21:50:32,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 163 [2022-07-20 21:50:34,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:34,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:34,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:50:34,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:34,718 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-07-20 21:50:34,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 269 treesize of output 139 [2022-07-20 21:50:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:50:34,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:38,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:38,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000831812] [2022-07-20 21:50:38,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:38,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372288803] [2022-07-20 21:50:38,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372288803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:50:38,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:50:38,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-07-20 21:50:38,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360640031] [2022-07-20 21:50:38,041 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:38,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:50:38,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:50:38,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=2286, Unknown=0, NotChecked=0, Total=2652 [2022-07-20 21:50:38,042 INFO L87 Difference]: Start difference. First operand 340 states and 439 transitions. Second operand has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:50:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:39,960 INFO L93 Difference]: Finished difference Result 382 states and 490 transitions. [2022-07-20 21:50:39,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 21:50:39,961 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 58 [2022-07-20 21:50:39,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:39,966 INFO L225 Difference]: With dead ends: 382 [2022-07-20 21:50:39,966 INFO L226 Difference]: Without dead ends: 378 [2022-07-20 21:50:39,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=434, Invalid=2758, Unknown=0, NotChecked=0, Total=3192 [2022-07-20 21:50:39,968 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 53 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:39,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 408 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1169 Invalid, 0 Unknown, 95 Unchecked, 1.3s Time] [2022-07-20 21:50:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-20 21:50:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 361. [2022-07-20 21:50:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 250 states have (on average 1.116) internal successors, (279), 254 states have internal predecessors, (279), 93 states have call successors, (93), 17 states have call predecessors, (93), 17 states have return successors, (93), 89 states have call predecessors, (93), 93 states have call successors, (93) [2022-07-20 21:50:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 465 transitions. [2022-07-20 21:50:40,026 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 465 transitions. Word has length 58 [2022-07-20 21:50:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:40,027 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 465 transitions. [2022-07-20 21:50:40,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:50:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 465 transitions. [2022-07-20 21:50:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 21:50:40,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:40,031 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:40,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:50:40,258 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 [2022-07-20 21:50:40,258 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1400995841, now seen corresponding path program 11 times [2022-07-20 21:50:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:40,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682743106] [2022-07-20 21:50:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:40,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:40,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898731873] [2022-07-20 21:50:40,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:50:40,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:40,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:40,289 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) [2022-07-20 21:50:40,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:50:40,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-20 21:50:40,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:50:40,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:50:40,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:50:40,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:50:40,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:40,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682743106] [2022-07-20 21:50:40,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:40,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898731873] [2022-07-20 21:50:40,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898731873] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:50:40,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:50:40,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-07-20 21:50:40,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138826910] [2022-07-20 21:50:40,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:40,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 21:50:40,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 21:50:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:50:40,589 INFO L87 Difference]: Start difference. First operand 361 states and 465 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:41,481 INFO L93 Difference]: Finished difference Result 849 states and 1100 transitions. [2022-07-20 21:50:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 21:50:41,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2022-07-20 21:50:41,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:41,484 INFO L225 Difference]: With dead ends: 849 [2022-07-20 21:50:41,484 INFO L226 Difference]: Without dead ends: 604 [2022-07-20 21:50:41,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 21:50:41,488 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 520 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:41,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 400 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 21:50:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-07-20 21:50:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 471. [2022-07-20 21:50:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 320 states have (on average 1.11875) internal successors, (358), 325 states have internal predecessors, (358), 131 states have call successors, (131), 19 states have call predecessors, (131), 19 states have return successors, (131), 126 states have call predecessors, (131), 131 states have call successors, (131) [2022-07-20 21:50:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 620 transitions. [2022-07-20 21:50:41,542 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 620 transitions. Word has length 60 [2022-07-20 21:50:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:41,543 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 620 transitions. [2022-07-20 21:50:41,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 620 transitions. [2022-07-20 21:50:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 21:50:41,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:41,544 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:41,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 21:50:41,759 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 [2022-07-20 21:50:41,759 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:41,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1599277695, now seen corresponding path program 12 times [2022-07-20 21:50:41,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:41,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677578011] [2022-07-20 21:50:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:41,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:41,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:41,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775023347] [2022-07-20 21:50:41,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:50:41,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:41,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:41,793 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:50:41,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:50:42,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-20 21:50:42,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:50:42,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:50:42,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:50:42,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:50:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:50:42,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:50:42,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677578011] [2022-07-20 21:50:42,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:50:42,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775023347] [2022-07-20 21:50:42,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775023347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:50:42,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:50:42,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-07-20 21:50:42,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567783853] [2022-07-20 21:50:42,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:50:42,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 21:50:42,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:50:42,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 21:50:42,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:50:42,220 INFO L87 Difference]: Start difference. First operand 471 states and 620 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:42,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:50:42,890 INFO L93 Difference]: Finished difference Result 523 states and 668 transitions. [2022-07-20 21:50:42,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:50:42,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2022-07-20 21:50:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:50:42,893 INFO L225 Difference]: With dead ends: 523 [2022-07-20 21:50:42,893 INFO L226 Difference]: Without dead ends: 519 [2022-07-20 21:50:42,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:50:42,894 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 126 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:50:42,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 646 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 21:50:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-07-20 21:50:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 473. [2022-07-20 21:50:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 322 states have (on average 1.1180124223602483) internal successors, (360), 327 states have internal predecessors, (360), 131 states have call successors, (131), 19 states have call predecessors, (131), 19 states have return successors, (131), 126 states have call predecessors, (131), 131 states have call successors, (131) [2022-07-20 21:50:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 622 transitions. [2022-07-20 21:50:42,948 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 622 transitions. Word has length 60 [2022-07-20 21:50:42,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:50:42,949 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 622 transitions. [2022-07-20 21:50:42,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:50:42,949 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 622 transitions. [2022-07-20 21:50:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 21:50:42,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:50:42,951 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:50:42,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 21:50:43,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-20 21:50:43,165 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:50:43,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:50:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash 745660931, now seen corresponding path program 13 times [2022-07-20 21:50:43,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:50:43,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19196593] [2022-07-20 21:50:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:50:43,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:50:43,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:50:43,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960086773] [2022-07-20 21:50:43,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:50:43,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:50:43,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:50:43,188 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:50:43,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 21:50:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:50:43,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-20 21:50:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:50:43,492 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 [2022-07-20 21:50:43,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,519 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 27 treesize of output 31 [2022-07-20 21:50:43,533 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 28 treesize of output 28 [2022-07-20 21:50:43,537 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 12 treesize of output 11 [2022-07-20 21:50:43,543 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 12 treesize of output 11 [2022-07-20 21:50:43,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 43 [2022-07-20 21:50:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2022-07-20 21:50:43,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 103 [2022-07-20 21:50:43,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:43,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2022-07-20 21:50:53,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:50:53,957 INFO L356 Elim1Store]: treesize reduction 228, result has 39.2 percent of original size [2022-07-20 21:50:53,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 199 [2022-07-20 21:50:56,868 INFO L356 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2022-07-20 21:50:56,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2022-07-20 21:50:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 66 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 21:50:56,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:51:11,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:51:11,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19196593] [2022-07-20 21:51:11,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:51:11,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960086773] [2022-07-20 21:51:11,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960086773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:51:11,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:51:11,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-07-20 21:51:11,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13543009] [2022-07-20 21:51:11,803 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 21:51:11,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 21:51:11,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:51:11,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 21:51:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3448, Unknown=11, NotChecked=0, Total=3782 [2022-07-20 21:51:11,805 INFO L87 Difference]: Start difference. First operand 473 states and 622 transitions. Second operand has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 35 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:51:13,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:51:13,967 INFO L93 Difference]: Finished difference Result 522 states and 679 transitions. [2022-07-20 21:51:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-20 21:51:13,975 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 35 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 62 [2022-07-20 21:51:13,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:51:13,978 INFO L225 Difference]: With dead ends: 522 [2022-07-20 21:51:13,978 INFO L226 Difference]: Without dead ends: 518 [2022-07-20 21:51:13,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=341, Invalid=3680, Unknown=11, NotChecked=0, Total=4032 [2022-07-20 21:51:13,980 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 48 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:51:13,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 459 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1623 Invalid, 0 Unknown, 100 Unchecked, 1.8s Time] [2022-07-20 21:51:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-07-20 21:51:14,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 498. [2022-07-20 21:51:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 341 states have (on average 1.1173020527859236) internal successors, (381), 346 states have internal predecessors, (381), 135 states have call successors, (135), 21 states have call predecessors, (135), 21 states have return successors, (135), 130 states have call predecessors, (135), 135 states have call successors, (135) [2022-07-20 21:51:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 651 transitions. [2022-07-20 21:51:14,037 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 651 transitions. Word has length 62 [2022-07-20 21:51:14,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:51:14,038 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 651 transitions. [2022-07-20 21:51:14,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 35 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:51:14,038 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 651 transitions. [2022-07-20 21:51:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 21:51:14,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:51:14,040 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:51:14,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 21:51:14,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 21:51:14,268 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:51:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:51:14,268 INFO L85 PathProgramCache]: Analyzing trace with hash -626149883, now seen corresponding path program 14 times [2022-07-20 21:51:14,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:51:14,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127914819] [2022-07-20 21:51:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:51:14,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:51:14,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:51:14,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264720326] [2022-07-20 21:51:14,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:51:14,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:51:14,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:51:14,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:51:14,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 21:51:14,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:51:14,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:51:14,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:51:14,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:51:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 52 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:51:14,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:51:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:51:14,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:51:14,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127914819] [2022-07-20 21:51:14,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:51:14,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264720326] [2022-07-20 21:51:14,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264720326] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:51:14,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:51:14,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-07-20 21:51:14,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166407827] [2022-07-20 21:51:14,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:51:14,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 21:51:14,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:51:14,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 21:51:14,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-07-20 21:51:14,685 INFO L87 Difference]: Start difference. First operand 498 states and 651 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:51:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:51:15,741 INFO L93 Difference]: Finished difference Result 1237 states and 1619 transitions. [2022-07-20 21:51:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 21:51:15,742 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2022-07-20 21:51:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:51:15,746 INFO L225 Difference]: With dead ends: 1237 [2022-07-20 21:51:15,746 INFO L226 Difference]: Without dead ends: 878 [2022-07-20 21:51:15,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=475, Invalid=1417, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 21:51:15,748 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 760 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:51:15,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 491 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 21:51:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-07-20 21:51:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 630. [2022-07-20 21:51:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 425 states have (on average 1.12) internal successors, (476), 431 states have internal predecessors, (476), 181 states have call successors, (181), 23 states have call predecessors, (181), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2022-07-20 21:51:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 838 transitions. [2022-07-20 21:51:15,826 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 838 transitions. Word has length 64 [2022-07-20 21:51:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:51:15,827 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 838 transitions. [2022-07-20 21:51:15,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:51:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 838 transitions. [2022-07-20 21:51:15,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 21:51:15,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:51:15,828 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:51:15,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 21:51:16,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 21:51:16,052 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:51:16,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:51:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1965962363, now seen corresponding path program 15 times [2022-07-20 21:51:16,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:51:16,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182727025] [2022-07-20 21:51:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:51:16,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:51:16,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:51:16,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166985478] [2022-07-20 21:51:16,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:51:16,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:51:16,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:51:16,076 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:51:16,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 21:51:16,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-20 21:51:16,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:51:16,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:51:16,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:51:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:51:16,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:51:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:51:16,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:51:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182727025] [2022-07-20 21:51:16,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:51:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166985478] [2022-07-20 21:51:16,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166985478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:51:16,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:51:16,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-07-20 21:51:16,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446207902] [2022-07-20 21:51:16,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:51:16,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 21:51:16,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:51:16,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 21:51:16,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-07-20 21:51:16,481 INFO L87 Difference]: Start difference. First operand 630 states and 838 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:51:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:51:17,479 INFO L93 Difference]: Finished difference Result 704 states and 907 transitions. [2022-07-20 21:51:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:51:17,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2022-07-20 21:51:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:51:17,491 INFO L225 Difference]: With dead ends: 704 [2022-07-20 21:51:17,491 INFO L226 Difference]: Without dead ends: 700 [2022-07-20 21:51:17,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 21:51:17,492 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 163 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:51:17,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 781 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 21:51:17,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-07-20 21:51:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 632. [2022-07-20 21:51:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 427 states have (on average 1.1194379391100702) internal successors, (478), 433 states have internal predecessors, (478), 181 states have call successors, (181), 23 states have call predecessors, (181), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2022-07-20 21:51:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 840 transitions. [2022-07-20 21:51:17,569 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 840 transitions. Word has length 64 [2022-07-20 21:51:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:51:17,570 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 840 transitions. [2022-07-20 21:51:17,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:51:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 840 transitions. [2022-07-20 21:51:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 21:51:17,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:51:17,572 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:51:17,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-20 21:51:17,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:51:17,787 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:51:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:51:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash 549013255, now seen corresponding path program 16 times [2022-07-20 21:51:17,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:51:17,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142164922] [2022-07-20 21:51:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:51:17,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:51:17,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:51:17,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977766151] [2022-07-20 21:51:17,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:51:17,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:51:17,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:51:17,809 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:51:17,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 21:51:18,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:51:18,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:51:18,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 153 conjunts are in the unsatisfiable core [2022-07-20 21:51:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:51:18,089 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 [2022-07-20 21:51:18,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,112 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 27 treesize of output 31 [2022-07-20 21:51:18,114 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 28 treesize of output 28 [2022-07-20 21:51:18,118 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 12 treesize of output 11 [2022-07-20 21:51:18,120 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 12 treesize of output 11 [2022-07-20 21:51:18,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 64 treesize of output 53 [2022-07-20 21:51:18,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-07-20 21:51:18,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2022-07-20 21:51:18,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2022-07-20 21:51:18,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:18,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 145 [2022-07-20 21:51:20,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:20,767 INFO L356 Elim1Store]: treesize reduction 276, result has 39.1 percent of original size [2022-07-20 21:51:20,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 12 case distinctions, treesize of input 144 treesize of output 235 [2022-07-20 21:51:26,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:51:26,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:51:26,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:51:26,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:51:26,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:26,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:51:26,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:51:26,098 INFO L356 Elim1Store]: treesize reduction 188, result has 17.9 percent of original size [2022-07-20 21:51:26,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 15 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 514 treesize of output 254 [2022-07-20 21:51:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:51:26,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:51:36,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:51:36,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142164922] [2022-07-20 21:51:36,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:51:36,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977766151] [2022-07-20 21:51:36,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977766151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:51:36,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:51:36,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-07-20 21:51:36,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397650670] [2022-07-20 21:51:36,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 21:51:36,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 21:51:36,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:51:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 21:51:36,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=3759, Unknown=2, NotChecked=0, Total=4290 [2022-07-20 21:51:36,266 INFO L87 Difference]: Start difference. First operand 632 states and 840 transitions. Second operand has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:51:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:51:41,233 INFO L93 Difference]: Finished difference Result 680 states and 897 transitions. [2022-07-20 21:51:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-20 21:51:41,233 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 66 [2022-07-20 21:51:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:51:41,236 INFO L225 Difference]: With dead ends: 680 [2022-07-20 21:51:41,237 INFO L226 Difference]: Without dead ends: 676 [2022-07-20 21:51:41,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=597, Invalid=4231, Unknown=2, NotChecked=0, Total=4830 [2022-07-20 21:51:41,239 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 51 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:51:41,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 607 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2093 Invalid, 0 Unknown, 164 Unchecked, 3.1s Time] [2022-07-20 21:51:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-07-20 21:51:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 653. [2022-07-20 21:51:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 443 states have (on average 1.1196388261851016) internal successors, (496), 449 states have internal predecessors, (496), 185 states have call successors, (185), 24 states have call predecessors, (185), 24 states have return successors, (185), 179 states have call predecessors, (185), 185 states have call successors, (185) [2022-07-20 21:51:41,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 866 transitions. [2022-07-20 21:51:41,319 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 866 transitions. Word has length 66 [2022-07-20 21:51:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:51:41,320 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 866 transitions. [2022-07-20 21:51:41,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:51:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 866 transitions. [2022-07-20 21:51:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 21:51:41,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:51:41,322 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:51:41,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 21:51:41,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:51:41,548 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:51:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:51:41,548 INFO L85 PathProgramCache]: Analyzing trace with hash -626005495, now seen corresponding path program 17 times [2022-07-20 21:51:41,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:51:41,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942268960] [2022-07-20 21:51:41,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:51:41,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:51:41,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:51:41,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004213685] [2022-07-20 21:51:41,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:51:41,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:51:41,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:51:41,572 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:51:41,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 21:51:41,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-20 21:51:41,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:51:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:51:41,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:51:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 65 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:51:41,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:51:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:51:42,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:51:42,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942268960] [2022-07-20 21:51:42,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:51:42,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004213685] [2022-07-20 21:51:42,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004213685] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:51:42,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:51:42,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-07-20 21:51:42,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862012195] [2022-07-20 21:51:42,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:51:42,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:51:42,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:51:42,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:51:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:51:42,181 INFO L87 Difference]: Start difference. First operand 653 states and 866 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:51:44,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:51:44,275 INFO L93 Difference]: Finished difference Result 1704 states and 2248 transitions. [2022-07-20 21:51:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-20 21:51:44,276 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2022-07-20 21:51:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:51:44,282 INFO L225 Difference]: With dead ends: 1704 [2022-07-20 21:51:44,282 INFO L226 Difference]: Without dead ends: 1209 [2022-07-20 21:51:44,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2022-07-20 21:51:44,286 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 914 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:51:44,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 608 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 21:51:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-07-20 21:51:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 807. [2022-07-20 21:51:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 541 states have (on average 1.121996303142329) internal successors, (607), 548 states have internal predecessors, (607), 239 states have call successors, (239), 26 states have call predecessors, (239), 26 states have return successors, (239), 232 states have call predecessors, (239), 239 states have call successors, (239) [2022-07-20 21:51:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1085 transitions. [2022-07-20 21:51:44,402 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1085 transitions. Word has length 68 [2022-07-20 21:51:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:51:44,403 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1085 transitions. [2022-07-20 21:51:44,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:51:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1085 transitions. [2022-07-20 21:51:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 21:51:44,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:51:44,406 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:51:44,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 21:51:44,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-20 21:51:44,623 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:51:44,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:51:44,624 INFO L85 PathProgramCache]: Analyzing trace with hash 304390025, now seen corresponding path program 18 times [2022-07-20 21:51:44,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:51:44,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015794289] [2022-07-20 21:51:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:51:44,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:51:44,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:51:44,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360794009] [2022-07-20 21:51:44,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:51:44,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:51:44,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:51:44,649 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:51:44,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 21:51:45,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-20 21:51:45,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:51:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:51:45,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:51:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 52 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:51:45,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:51:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:51:45,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:51:45,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015794289] [2022-07-20 21:51:45,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:51:45,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360794009] [2022-07-20 21:51:45,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360794009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:51:45,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:51:45,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-07-20 21:51:45,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292374887] [2022-07-20 21:51:45,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:51:45,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:51:45,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:51:45,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:51:45,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:51:45,476 INFO L87 Difference]: Start difference. First operand 807 states and 1085 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:51:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:51:47,045 INFO L93 Difference]: Finished difference Result 907 states and 1179 transitions. [2022-07-20 21:51:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:51:47,047 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2022-07-20 21:51:47,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:51:47,050 INFO L225 Difference]: With dead ends: 907 [2022-07-20 21:51:47,051 INFO L226 Difference]: Without dead ends: 903 [2022-07-20 21:51:47,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=1123, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:51:47,052 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 201 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:51:47,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1084 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 21:51:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-07-20 21:51:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 809. [2022-07-20 21:51:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 543 states have (on average 1.1215469613259668) internal successors, (609), 550 states have internal predecessors, (609), 239 states have call successors, (239), 26 states have call predecessors, (239), 26 states have return successors, (239), 232 states have call predecessors, (239), 239 states have call successors, (239) [2022-07-20 21:51:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1087 transitions. [2022-07-20 21:51:47,167 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1087 transitions. Word has length 68 [2022-07-20 21:51:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:51:47,167 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 1087 transitions. [2022-07-20 21:51:47,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:51:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1087 transitions. [2022-07-20 21:51:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 21:51:47,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:51:47,169 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:51:47,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 21:51:47,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-20 21:51:47,392 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:51:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:51:47,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1906516020, now seen corresponding path program 1 times [2022-07-20 21:51:47,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:51:47,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412906502] [2022-07-20 21:51:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:51:47,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:51:47,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:51:47,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47564594] [2022-07-20 21:51:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:51:47,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:51:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:51:47,406 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:51:47,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 21:51:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:51:47,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 21:51:47,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:51:47,544 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 [2022-07-20 21:51:47,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:47,834 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 18 treesize of output 18 [2022-07-20 21:51:47,840 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 12 treesize of output 11 [2022-07-20 21:51:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 84 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 21:51:48,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:51:48,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:51:48,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412906502] [2022-07-20 21:51:48,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:51:48,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47564594] [2022-07-20 21:51:48,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47564594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:51:48,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:51:48,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-20 21:51:48,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085603694] [2022-07-20 21:51:48,840 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 21:51:48,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:51:48,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:51:48,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:51:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-07-20 21:51:48,841 INFO L87 Difference]: Start difference. First operand 809 states and 1087 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 21:51:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:51:49,153 INFO L93 Difference]: Finished difference Result 828 states and 1105 transitions. [2022-07-20 21:51:49,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:51:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 73 [2022-07-20 21:51:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:51:49,156 INFO L225 Difference]: With dead ends: 828 [2022-07-20 21:51:49,156 INFO L226 Difference]: Without dead ends: 696 [2022-07-20 21:51:49,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:51:49,158 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:51:49,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 298 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 107 Invalid, 0 Unknown, 115 Unchecked, 0.1s Time] [2022-07-20 21:51:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-07-20 21:51:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 696. [2022-07-20 21:51:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 469 states have (on average 1.1215351812366738) internal successors, (526), 475 states have internal predecessors, (526), 205 states have call successors, (205), 21 states have call predecessors, (205), 21 states have return successors, (205), 199 states have call predecessors, (205), 205 states have call successors, (205) [2022-07-20 21:51:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 936 transitions. [2022-07-20 21:51:49,263 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 936 transitions. Word has length 73 [2022-07-20 21:51:49,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:51:49,264 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 936 transitions. [2022-07-20 21:51:49,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 21:51:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 936 transitions. [2022-07-20 21:51:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 21:51:49,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:51:49,266 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:51:49,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 21:51:49,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:51:49,479 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:51:49,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:51:49,480 INFO L85 PathProgramCache]: Analyzing trace with hash 514271755, now seen corresponding path program 19 times [2022-07-20 21:51:49,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:51:49,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693831930] [2022-07-20 21:51:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:51:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:51:49,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:51:49,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767184708] [2022-07-20 21:51:49,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:51:49,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:51:49,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:51:49,501 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:51:49,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 21:51:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:51:49,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 174 conjunts are in the unsatisfiable core [2022-07-20 21:51:49,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:51:49,889 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 [2022-07-20 21:51:49,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:49,915 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 27 treesize of output 31 [2022-07-20 21:51:49,919 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 28 treesize of output 28 [2022-07-20 21:51:49,923 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 12 treesize of output 11 [2022-07-20 21:51:49,927 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 12 treesize of output 11 [2022-07-20 21:51:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 64 treesize of output 53 [2022-07-20 21:51:50,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2022-07-20 21:51:50,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 113 [2022-07-20 21:51:50,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 143 [2022-07-20 21:51:50,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:50,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 173 [2022-07-20 21:51:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:51:51,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 163 [2022-07-20 21:52:08,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:08,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:09,083 INFO L356 Elim1Store]: treesize reduction 324, result has 39.0 percent of original size [2022-07-20 21:52:09,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 44 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 14 case distinctions, treesize of input 162 treesize of output 271 [2022-07-20 21:52:17,916 INFO L356 Elim1Store]: treesize reduction 53, result has 7.0 percent of original size [2022-07-20 21:52:17,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 600 treesize of output 276 [2022-07-20 21:52:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 114 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 21:52:18,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:41,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:41,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693831930] [2022-07-20 21:52:41,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:52:41,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767184708] [2022-07-20 21:52:41,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767184708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:41,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:52:41,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2022-07-20 21:52:41,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142642674] [2022-07-20 21:52:41,698 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:41,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-20 21:52:41,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:41,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-20 21:52:41,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=5141, Unknown=18, NotChecked=0, Total=5550 [2022-07-20 21:52:41,701 INFO L87 Difference]: Start difference. First operand 696 states and 936 transitions. Second operand has 48 states, 45 states have (on average 1.2) internal successors, (54), 43 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:52:45,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:45,062 INFO L93 Difference]: Finished difference Result 740 states and 985 transitions. [2022-07-20 21:52:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-20 21:52:45,063 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.2) internal successors, (54), 43 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 70 [2022-07-20 21:52:45,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:45,065 INFO L225 Difference]: With dead ends: 740 [2022-07-20 21:52:45,065 INFO L226 Difference]: Without dead ends: 736 [2022-07-20 21:52:45,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=397, Invalid=5285, Unknown=18, NotChecked=0, Total=5700 [2022-07-20 21:52:45,067 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:45,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 457 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1050 Invalid, 0 Unknown, 72 Unchecked, 2.8s Time] [2022-07-20 21:52:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-07-20 21:52:45,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 721. [2022-07-20 21:52:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 488 states have (on average 1.1209016393442623) internal successors, (547), 494 states have internal predecessors, (547), 209 states have call successors, (209), 23 states have call predecessors, (209), 23 states have return successors, (209), 203 states have call predecessors, (209), 209 states have call successors, (209) [2022-07-20 21:52:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 965 transitions. [2022-07-20 21:52:45,166 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 965 transitions. Word has length 70 [2022-07-20 21:52:45,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:45,166 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 965 transitions. [2022-07-20 21:52:45,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.2) internal successors, (54), 43 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:52:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 965 transitions. [2022-07-20 21:52:45,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 21:52:45,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:45,169 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:45,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:45,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:45,387 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:45,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1716998410, now seen corresponding path program 2 times [2022-07-20 21:52:45,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:45,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796079321] [2022-07-20 21:52:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:45,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:45,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:52:45,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336411553] [2022-07-20 21:52:45,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:52:45,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:45,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:45,405 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:52:45,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 21:52:45,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:52:45,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:45,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:52:45,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-20 21:52:45,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-20 21:52:45,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:45,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796079321] [2022-07-20 21:52:45,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:52:45,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336411553] [2022-07-20 21:52:45,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336411553] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:45,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:52:45,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-20 21:52:45,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919044538] [2022-07-20 21:52:45,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:45,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 21:52:45,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 21:52:45,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:52:45,748 INFO L87 Difference]: Start difference. First operand 721 states and 965 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:52:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:46,018 INFO L93 Difference]: Finished difference Result 748 states and 991 transitions. [2022-07-20 21:52:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 21:52:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2022-07-20 21:52:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:46,022 INFO L225 Difference]: With dead ends: 748 [2022-07-20 21:52:46,023 INFO L226 Difference]: Without dead ends: 744 [2022-07-20 21:52:46,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:52:46,024 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:46,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 104 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:52:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-07-20 21:52:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 718. [2022-07-20 21:52:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 485 states have (on average 1.1195876288659794) internal successors, (543), 491 states have internal predecessors, (543), 209 states have call successors, (209), 23 states have call predecessors, (209), 23 states have return successors, (209), 203 states have call predecessors, (209), 209 states have call successors, (209) [2022-07-20 21:52:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 961 transitions. [2022-07-20 21:52:46,134 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 961 transitions. Word has length 75 [2022-07-20 21:52:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:46,134 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 961 transitions. [2022-07-20 21:52:46,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:52:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 961 transitions. [2022-07-20 21:52:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 21:52:46,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:46,136 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:46,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:46,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-20 21:52:46,351 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:46,352 INFO L85 PathProgramCache]: Analyzing trace with hash 347151373, now seen corresponding path program 20 times [2022-07-20 21:52:46,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:46,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468702186] [2022-07-20 21:52:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:46,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:46,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:52:46,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283269991] [2022-07-20 21:52:46,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:52:46,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:46,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:46,372 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:52:46,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 21:52:46,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:52:46,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:46,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:52:46,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 80 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:52:46,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:52:46,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:46,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468702186] [2022-07-20 21:52:46,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:52:46,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283269991] [2022-07-20 21:52:46,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283269991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:46,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:52:46,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2022-07-20 21:52:46,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107336241] [2022-07-20 21:52:46,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:46,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 21:52:46,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 21:52:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-07-20 21:52:46,983 INFO L87 Difference]: Start difference. First operand 718 states and 961 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:52:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:49,828 INFO L93 Difference]: Finished difference Result 1965 states and 2595 transitions. [2022-07-20 21:52:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-20 21:52:49,829 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-07-20 21:52:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:49,833 INFO L225 Difference]: With dead ends: 1965 [2022-07-20 21:52:49,833 INFO L226 Difference]: Without dead ends: 1401 [2022-07-20 21:52:49,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=921, Invalid=3239, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 21:52:49,835 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 1209 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 1079 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1079 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:49,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 686 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1079 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-20 21:52:49,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-07-20 21:52:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 883. [2022-07-20 21:52:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 590 states have (on average 1.1220338983050848) internal successors, (662), 597 states have internal predecessors, (662), 267 states have call successors, (267), 25 states have call predecessors, (267), 25 states have return successors, (267), 260 states have call predecessors, (267), 267 states have call successors, (267) [2022-07-20 21:52:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1196 transitions. [2022-07-20 21:52:49,953 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1196 transitions. Word has length 72 [2022-07-20 21:52:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:49,954 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1196 transitions. [2022-07-20 21:52:49,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:52:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1196 transitions. [2022-07-20 21:52:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 21:52:49,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:49,956 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:49,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:50,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-20 21:52:50,172 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1104048525, now seen corresponding path program 21 times [2022-07-20 21:52:50,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:50,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730563996] [2022-07-20 21:52:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:50,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:50,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:52:50,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436372846] [2022-07-20 21:52:50,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:52:50,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:50,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:50,193 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:52:50,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 21:52:50,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-20 21:52:50,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:50,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:52:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 65 proven. 64 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:52:50,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:52:51,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:51,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730563996] [2022-07-20 21:52:51,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:52:51,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436372846] [2022-07-20 21:52:51,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436372846] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:51,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:52:51,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2022-07-20 21:52:51,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982636120] [2022-07-20 21:52:51,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:51,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 21:52:51,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:51,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 21:52:51,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-07-20 21:52:51,046 INFO L87 Difference]: Start difference. First operand 883 states and 1196 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:52:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:52,721 INFO L93 Difference]: Finished difference Result 1003 states and 1310 transitions. [2022-07-20 21:52:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 21:52:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-07-20 21:52:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:52,725 INFO L225 Difference]: With dead ends: 1003 [2022-07-20 21:52:52,726 INFO L226 Difference]: Without dead ends: 999 [2022-07-20 21:52:52,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 21:52:52,727 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 357 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:52,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 759 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 21:52:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-07-20 21:52:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 885. [2022-07-20 21:52:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 592 states have (on average 1.1216216216216217) internal successors, (664), 599 states have internal predecessors, (664), 267 states have call successors, (267), 25 states have call predecessors, (267), 25 states have return successors, (267), 260 states have call predecessors, (267), 267 states have call successors, (267) [2022-07-20 21:52:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1198 transitions. [2022-07-20 21:52:52,863 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1198 transitions. Word has length 72 [2022-07-20 21:52:52,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:52,863 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1198 transitions. [2022-07-20 21:52:52,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 21:52:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1198 transitions. [2022-07-20 21:52:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 21:52:52,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:52,865 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:52,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:53,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-20 21:52:53,081 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash 821264204, now seen corresponding path program 3 times [2022-07-20 21:52:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:53,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96798384] [2022-07-20 21:52:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:53,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:53,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:52:53,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497383719] [2022-07-20 21:52:53,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:52:53,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:53,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:53,093 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:52:53,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 21:52:53,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-20 21:52:53,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-20 21:52:53,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:53,368 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 [2022-07-20 21:52:53,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-07-20 21:52:53,395 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 18 treesize of output 20 [2022-07-20 21:52:53,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:52:53,433 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 35 treesize of output 36 [2022-07-20 21:52:53,449 INFO L356 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-07-20 21:52:53,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 28 [2022-07-20 21:52:53,455 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 21:52:53,455 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 40 treesize of output 42 [2022-07-20 21:53:03,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:53:03,987 INFO L356 Elim1Store]: treesize reduction 58, result has 37.6 percent of original size [2022-07-20 21:53:03,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 115 [2022-07-20 21:53:04,079 INFO L356 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-07-20 21:53:04,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 91 [2022-07-20 21:53:04,124 INFO L356 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2022-07-20 21:53:04,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 36 [2022-07-20 21:53:05,453 INFO L356 Elim1Store]: treesize reduction 56, result has 43.4 percent of original size [2022-07-20 21:53:05,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 64 [2022-07-20 21:53:06,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-20 21:53:06,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:53:06,796 INFO L356 Elim1Store]: treesize reduction 268, result has 36.3 percent of original size [2022-07-20 21:53:06,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 200 treesize of output 365 [2022-07-20 21:53:10,240 INFO L356 Elim1Store]: treesize reduction 182, result has 33.8 percent of original size [2022-07-20 21:53:10,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 97 treesize of output 142 [2022-07-20 21:53:19,032 INFO L356 Elim1Store]: treesize reduction 94, result has 43.4 percent of original size [2022-07-20 21:53:19,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 189 [2022-07-20 21:53:29,371 INFO L356 Elim1Store]: treesize reduction 90, result has 45.8 percent of original size [2022-07-20 21:53:29,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 100 [2022-07-20 21:53:29,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:53:29,800 INFO L356 Elim1Store]: treesize reduction 109, result has 29.2 percent of original size [2022-07-20 21:53:29,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 69 [2022-07-20 21:53:30,297 INFO L356 Elim1Store]: treesize reduction 119, result has 28.3 percent of original size [2022-07-20 21:53:30,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 71 [2022-07-20 21:53:31,733 INFO L356 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2022-07-20 21:53:31,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 98 [2022-07-20 21:53:32,064 INFO L356 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2022-07-20 21:53:32,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 98