./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/eqn2.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 6c5e7a5b5183897e81f3d009c328161669eb0a8a3042b507053cc41bb75da51c --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 22:07:33,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:07:33,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:07:33,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:07:33,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:07:33,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:07:33,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:07:33,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:07:33,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:07:33,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:07:33,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:07:33,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:07:33,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:07:33,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:07:33,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:07:33,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:07:33,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:07:33,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:07:33,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:07:33,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:07:33,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:07:33,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:07:33,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:07:33,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:07:33,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:07:33,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:07:33,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:07:33,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:07:33,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:07:33,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:07:33,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:07:33,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:07:33,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:07:33,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:07:33,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:07:33,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:07:33,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:07:33,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:07:33,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:07:33,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:07:33,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:07:33,550 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 22:07:33,574 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:07:33,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:07:33,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:07:33,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:07:33,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:07:33,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:07:33,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:07:33,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:07:33,576 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:07:33,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:07:33,576 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:07:33,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 22:07:33,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:07:33,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:07:33,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:07:33,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:07:33,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:07:33,578 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:07:33,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:07:33,578 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:07:33,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:07:33,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:07:33,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:07:33,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:07:33,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:07:33,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:07:33,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:07:33,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:07:33,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 22:07:33,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 22:07:33,580 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:07:33,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:07:33,580 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:07:33,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:07:33,580 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:07:33,581 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c5e7a5b5183897e81f3d009c328161669eb0a8a3042b507053cc41bb75da51c [2023-02-14 22:07:33,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:07:33,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:07:33,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:07:33,782 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:07:33,783 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:07:33,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn2.c [2023-02-14 22:07:34,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:07:35,071 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:07:35,072 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2.c [2023-02-14 22:07:35,077 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e0118c5f/7b38e86aae8748acbf412de38fe43551/FLAG2d8ffd808 [2023-02-14 22:07:35,090 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e0118c5f/7b38e86aae8748acbf412de38fe43551 [2023-02-14 22:07:35,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:07:35,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:07:35,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:07:35,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:07:35,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:07:35,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d7832b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35, skipping insertion in model container [2023-02-14 22:07:35,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:07:35,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:07:35,254 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2.c[587,600] [2023-02-14 22:07:35,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:07:35,296 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:07:35,310 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2.c[587,600] [2023-02-14 22:07:35,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:07:35,326 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:07:35,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35 WrapperNode [2023-02-14 22:07:35,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:07:35,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:07:35,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:07:35,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:07:35,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,367 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-02-14 22:07:35,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:07:35,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:07:35,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:07:35,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:07:35,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,392 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:07:35,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:07:35,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:07:35,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:07:35,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (1/1) ... [2023-02-14 22:07:35,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:07:35,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:35,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 22:07:35,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 22:07:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:07:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 22:07:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 22:07:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 22:07:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:07:35,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:07:35,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 22:07:35,511 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:07:35,512 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:07:35,642 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:07:35,646 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:07:35,647 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 22:07:35,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:07:35 BoogieIcfgContainer [2023-02-14 22:07:35,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:07:35,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:07:35,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:07:35,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:07:35,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:07:35" (1/3) ... [2023-02-14 22:07:35,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300d8222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:07:35, skipping insertion in model container [2023-02-14 22:07:35,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:35" (2/3) ... [2023-02-14 22:07:35,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300d8222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:07:35, skipping insertion in model container [2023-02-14 22:07:35,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:07:35" (3/3) ... [2023-02-14 22:07:35,667 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn2.c [2023-02-14 22:07:35,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:07:35,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 22:07:35,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:07:35,733 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@56916fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:07:35,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 22:07:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 22:07:35,741 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:07:35,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:07:35,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:07:35,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:07:35,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2023-02-14 22:07:35,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:07:35,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294384091] [2023-02-14 22:07:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:35,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:07:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:07:35,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:07:35,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294384091] [2023-02-14 22:07:35,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 22:07:35,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222175740] [2023-02-14 22:07:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:35,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:35,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:35,904 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:07:35,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 22:07:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:07:35,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 22:07:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:07:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:36,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:07:36,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222175740] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:07:36,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:07:36,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 22:07:36,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895146910] [2023-02-14 22:07:36,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:07:36,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 22:07:36,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:07:36,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 22:07:36,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 22:07:36,041 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:07:36,057 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-02-14 22:07:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 22:07:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-14 22:07:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:07:36,063 INFO L225 Difference]: With dead ends: 38 [2023-02-14 22:07:36,063 INFO L226 Difference]: Without dead ends: 17 [2023-02-14 22:07:36,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 22:07:36,073 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:07:36,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:07:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-14 22:07:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-14 22:07:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-14 22:07:36,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-02-14 22:07:36,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:07:36,095 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-14 22:07:36,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-14 22:07:36,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 22:07:36,096 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:07:36,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:07:36,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 22:07:36,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 22:07:36,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:07:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:07:36,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2023-02-14 22:07:36,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:07:36,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341562888] [2023-02-14 22:07:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:36,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:07:36,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:07:36,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319070948] [2023-02-14 22:07:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:36,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:36,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:36,345 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:07:36,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 22:07:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:07:36,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 22:07:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:07:36,503 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 22:07:36,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 22:07:36,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:07:36,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:07:36,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:07:36,611 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 22:07:36,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-14 22:07:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:36,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:07:36,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:07:36,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341562888] [2023-02-14 22:07:36,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:07:36,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319070948] [2023-02-14 22:07:36,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319070948] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:07:36,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:07:36,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:07:36,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345559952] [2023-02-14 22:07:36,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:07:36,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:07:36,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:07:36,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:07:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:07:36,674 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:07:36,748 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-02-14 22:07:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:07:36,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-14 22:07:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:07:36,751 INFO L225 Difference]: With dead ends: 34 [2023-02-14 22:07:36,751 INFO L226 Difference]: Without dead ends: 32 [2023-02-14 22:07:36,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:07:36,753 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:07:36,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 56 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:07:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-14 22:07:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2023-02-14 22:07:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-14 22:07:36,768 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2023-02-14 22:07:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:07:36,768 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-14 22:07:36,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-14 22:07:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 22:07:36,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:07:36,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:07:36,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 22:07:36,974 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,SelfDestructingSolverStorable1 [2023-02-14 22:07:36,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:07:36,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:07:36,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2023-02-14 22:07:36,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:07:36,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983859933] [2023-02-14 22:07:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:36,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:07:37,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:07:37,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106712389] [2023-02-14 22:07:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:37,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:37,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:37,003 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:07:37,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 22:07:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:07:37,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 22:07:37,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:07:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:37,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:07:37,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:07:37,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983859933] [2023-02-14 22:07:37,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:07:37,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106712389] [2023-02-14 22:07:37,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106712389] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:07:37,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:07:37,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:07:37,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393209861] [2023-02-14 22:07:37,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:07:37,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:07:37,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:07:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:07:37,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:07:37,104 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:07:37,173 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-02-14 22:07:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:07:37,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-14 22:07:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:07:37,176 INFO L225 Difference]: With dead ends: 49 [2023-02-14 22:07:37,177 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 22:07:37,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:07:37,185 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:07:37,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:07:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 22:07:37,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2023-02-14 22:07:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-14 22:07:37,195 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2023-02-14 22:07:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:07:37,196 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-14 22:07:37,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-14 22:07:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 22:07:37,197 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:07:37,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:07:37,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 22:07:37,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:37,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:07:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:07:37,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2023-02-14 22:07:37,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:07:37,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262907100] [2023-02-14 22:07:37,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:37,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:07:37,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:07:37,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017833185] [2023-02-14 22:07:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:37,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:37,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:37,450 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:07:37,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 22:07:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:07:37,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 22:07:37,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:07:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:37,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:07:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:37,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:07:37,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262907100] [2023-02-14 22:07:37,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:07:37,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017833185] [2023-02-14 22:07:37,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017833185] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:07:37,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:07:37,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-02-14 22:07:37,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91657990] [2023-02-14 22:07:37,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:07:37,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:07:37,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:07:37,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:07:37,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:07:37,583 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:07:37,668 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-02-14 22:07:37,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 22:07:37,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-14 22:07:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:07:37,679 INFO L225 Difference]: With dead ends: 44 [2023-02-14 22:07:37,679 INFO L226 Difference]: Without dead ends: 37 [2023-02-14 22:07:37,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-14 22:07:37,684 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:07:37,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:07:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-14 22:07:37,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2023-02-14 22:07:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-14 22:07:37,694 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2023-02-14 22:07:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:07:37,695 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-14 22:07:37,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-14 22:07:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 22:07:37,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:07:37,696 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:07:37,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 22:07:37,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:37,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:07:37,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:07:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2023-02-14 22:07:37,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:07:37,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109323509] [2023-02-14 22:07:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:37,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:07:37,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:07:37,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837773881] [2023-02-14 22:07:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:37,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:37,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:37,940 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:07:37,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 22:07:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:07:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 22:07:38,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:07:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:38,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:07:38,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:07:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109323509] [2023-02-14 22:07:38,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:07:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837773881] [2023-02-14 22:07:38,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837773881] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:07:38,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:07:38,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:07:38,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485698627] [2023-02-14 22:07:38,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:07:38,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:07:38,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:07:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:07:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:07:38,058 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:38,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:07:38,111 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2023-02-14 22:07:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:07:38,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-14 22:07:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:07:38,112 INFO L225 Difference]: With dead ends: 41 [2023-02-14 22:07:38,112 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 22:07:38,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:07:38,113 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:07:38,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:07:38,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 22:07:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-14 22:07:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-14 22:07:38,120 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2023-02-14 22:07:38,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:07:38,121 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-14 22:07:38,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:38,121 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-14 22:07:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 22:07:38,122 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:07:38,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:07:38,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 22:07:38,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:38,327 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:07:38,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:07:38,328 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2023-02-14 22:07:38,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:07:38,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397519716] [2023-02-14 22:07:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:38,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:07:38,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:07:38,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162566217] [2023-02-14 22:07:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:38,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:38,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:38,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:07:38,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 22:07:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:07:38,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 22:07:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:07:38,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 22:07:38,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:38,455 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 14 [2023-02-14 22:07:38,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:07:38,475 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-14 22:07:38,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-14 22:07:38,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-14 22:07:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:38,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:07:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:38,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:07:38,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397519716] [2023-02-14 22:07:38,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:07:38,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162566217] [2023-02-14 22:07:38,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162566217] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:07:38,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:07:38,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-02-14 22:07:38,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156694308] [2023-02-14 22:07:38,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:07:38,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 22:07:38,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:07:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 22:07:38,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-14 22:07:38,643 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:07:38,872 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-02-14 22:07:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 22:07:38,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-14 22:07:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:07:38,873 INFO L225 Difference]: With dead ends: 54 [2023-02-14 22:07:38,873 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 22:07:38,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-02-14 22:07:38,874 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:07:38,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 59 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:07:38,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 22:07:38,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 26. [2023-02-14 22:07:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-14 22:07:38,879 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2023-02-14 22:07:38,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:07:38,879 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-14 22:07:38,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-14 22:07:38,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 22:07:38,880 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:07:38,880 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:07:38,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 22:07:39,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:39,081 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:07:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:07:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2023-02-14 22:07:39,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:07:39,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764470435] [2023-02-14 22:07:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:39,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:07:39,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:07:39,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301490828] [2023-02-14 22:07:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:39,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:39,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:39,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:07:39,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 22:07:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:07:39,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-14 22:07:39,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:07:39,257 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-02-14 22:07:39,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-02-14 22:07:39,290 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2023-02-14 22:07:39,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 71 [2023-02-14 22:07:39,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:07:39,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:07:39,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:07:39,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 51 [2023-02-14 22:07:39,375 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:07:39,377 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:07:39,378 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2023-02-14 22:07:39,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 64 [2023-02-14 22:07:39,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:07:39,446 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 22:07:39,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 22:07:39,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:39,508 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 22:07:39,509 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 35 [2023-02-14 22:07:39,581 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:07:39,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:39,589 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2023-02-14 22:07:39,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 4 case distinctions, treesize of input 51 treesize of output 44 [2023-02-14 22:07:39,755 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-02-14 22:07:39,755 INFO L350 Elim1Store]: Elim1 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 6 case distinctions, treesize of input 81 treesize of output 41 [2023-02-14 22:07:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:39,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:07:53,203 WARN L233 SmtUtils]: Spent 8.86s on a formula simplification. DAG size of input: 67 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:07:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:53,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:07:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764470435] [2023-02-14 22:07:53,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:07:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301490828] [2023-02-14 22:07:53,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301490828] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:07:53,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:07:53,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-14 22:07:53,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792445232] [2023-02-14 22:07:53,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:07:53,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 22:07:53,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:07:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 22:07:53,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=191, Unknown=1, NotChecked=0, Total=240 [2023-02-14 22:07:53,232 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:56,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:07:56,038 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-02-14 22:07:56,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 22:07:56,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-14 22:07:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:07:56,040 INFO L225 Difference]: With dead ends: 82 [2023-02-14 22:07:56,040 INFO L226 Difference]: Without dead ends: 80 [2023-02-14 22:07:56,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=240, Invalid=815, Unknown=1, NotChecked=0, Total=1056 [2023-02-14 22:07:56,041 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 162 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 22:07:56,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 105 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 22:07:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-14 22:07:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2023-02-14 22:07:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:56,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-02-14 22:07:56,055 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 20 [2023-02-14 22:07:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:07:56,055 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-02-14 22:07:56,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-02-14 22:07:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 22:07:56,056 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:07:56,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:07:56,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 22:07:56,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:56,257 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:07:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:07:56,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1334592554, now seen corresponding path program 2 times [2023-02-14 22:07:56,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:07:56,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717684492] [2023-02-14 22:07:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:56,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:07:56,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:07:56,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511255503] [2023-02-14 22:07:56,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:07:56,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:56,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:56,302 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:07:56,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 22:07:56,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:07:56,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:07:56,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 22:07:56,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:07:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:07:56,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:07:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:07:56,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:07:56,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717684492] [2023-02-14 22:07:56,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:07:56,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511255503] [2023-02-14 22:07:56,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511255503] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:07:56,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:07:56,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-14 22:07:56,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055245653] [2023-02-14 22:07:56,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:07:56,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:07:56,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:07:56,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:07:56,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:07:56,427 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:07:56,540 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2023-02-14 22:07:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 22:07:56,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-14 22:07:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:07:56,541 INFO L225 Difference]: With dead ends: 103 [2023-02-14 22:07:56,541 INFO L226 Difference]: Without dead ends: 80 [2023-02-14 22:07:56,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-14 22:07:56,542 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:07:56,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 38 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:07:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-14 22:07:56,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2023-02-14 22:07:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-02-14 22:07:56,552 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 20 [2023-02-14 22:07:56,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:07:56,552 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-02-14 22:07:56,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-02-14 22:07:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 22:07:56,554 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:07:56,554 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:07:56,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 22:07:56,759 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,SelfDestructingSolverStorable7 [2023-02-14 22:07:56,760 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:07:56,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:07:56,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 3 times [2023-02-14 22:07:56,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:07:56,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722864197] [2023-02-14 22:07:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:56,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:07:56,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:07:56,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644044587] [2023-02-14 22:07:56,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 22:07:56,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:56,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:56,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:07:56,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 22:07:56,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 22:07:56,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:07:56,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 22:07:56,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:07:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:57,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:07:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:57,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:07:57,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722864197] [2023-02-14 22:07:57,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:07:57,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644044587] [2023-02-14 22:07:57,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644044587] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:07:57,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:07:57,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-14 22:07:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284529006] [2023-02-14 22:07:57,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:07:57,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 22:07:57,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:07:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 22:07:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:07:57,111 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:07:57,361 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2023-02-14 22:07:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 22:07:57,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-14 22:07:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:07:57,362 INFO L225 Difference]: With dead ends: 113 [2023-02-14 22:07:57,362 INFO L226 Difference]: Without dead ends: 81 [2023-02-14 22:07:57,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2023-02-14 22:07:57,363 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 113 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:07:57,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 71 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:07:57,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-14 22:07:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2023-02-14 22:07:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-14 22:07:57,372 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 22 [2023-02-14 22:07:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:07:57,373 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-14 22:07:57,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-14 22:07:57,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 22:07:57,374 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:07:57,374 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:07:57,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 22:07:57,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:57,580 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:07:57,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:07:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1083970380, now seen corresponding path program 2 times [2023-02-14 22:07:57,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:07:57,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274039731] [2023-02-14 22:07:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:57,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:07:57,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:07:57,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456298264] [2023-02-14 22:07:57,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:07:57,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:57,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:57,611 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:07:57,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 22:07:57,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:07:57,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:07:57,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 22:07:57,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:07:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:07:57,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:07:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:07:57,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:07:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274039731] [2023-02-14 22:07:57,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:07:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456298264] [2023-02-14 22:07:57,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456298264] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:07:57,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:07:57,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-02-14 22:07:57,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072985247] [2023-02-14 22:07:57,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:07:57,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 22:07:57,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:07:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 22:07:57,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:07:57,786 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:07:58,015 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-02-14 22:07:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 22:07:58,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-14 22:07:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:07:58,017 INFO L225 Difference]: With dead ends: 83 [2023-02-14 22:07:58,017 INFO L226 Difference]: Without dead ends: 67 [2023-02-14 22:07:58,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2023-02-14 22:07:58,018 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 121 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:07:58,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 91 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:07:58,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-14 22:07:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2023-02-14 22:07:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-02-14 22:07:58,024 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2023-02-14 22:07:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:07:58,024 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-02-14 22:07:58,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:07:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-02-14 22:07:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 22:07:58,025 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:07:58,025 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:07:58,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 22:07:58,231 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,SelfDestructingSolverStorable9 [2023-02-14 22:07:58,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:07:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:07:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2023-02-14 22:07:58,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:07:58,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897036071] [2023-02-14 22:07:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:07:58,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:07:58,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:07:58,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308275907] [2023-02-14 22:07:58,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 22:07:58,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:07:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:07:58,252 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:07:58,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 22:07:58,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 22:07:58,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:07:58,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-14 22:07:58,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:07:58,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 22:07:58,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:58,628 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 14 [2023-02-14 22:07:58,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:07:58,650 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-14 22:07:58,672 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-14 22:07:58,698 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-14 22:07:58,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2023-02-14 22:07:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:58,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:58,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-14 22:07:58,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:58,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:58,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 17 [2023-02-14 22:07:58,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2023-02-14 22:07:58,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:58,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-14 22:07:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:58,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 17 [2023-02-14 22:07:58,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:07:58,835 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2023-02-14 22:07:58,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-14 22:07:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:07:58,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:07:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:07:59,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:07:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897036071] [2023-02-14 22:07:59,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:07:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308275907] [2023-02-14 22:07:59,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308275907] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:07:59,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:07:59,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-02-14 22:07:59,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308593327] [2023-02-14 22:07:59,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:07:59,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 22:07:59,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:07:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 22:07:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=276, Unknown=3, NotChecked=0, Total=380 [2023-02-14 22:07:59,372 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:00,107 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2023-02-14 22:08:00,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 22:08:00,108 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-14 22:08:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:00,109 INFO L225 Difference]: With dead ends: 111 [2023-02-14 22:08:00,109 INFO L226 Difference]: Without dead ends: 109 [2023-02-14 22:08:00,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=808, Unknown=3, NotChecked=0, Total=1122 [2023-02-14 22:08:00,111 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:00,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 158 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 22:08:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-14 22:08:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 49. [2023-02-14 22:08:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-02-14 22:08:00,120 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2023-02-14 22:08:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:00,121 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-02-14 22:08:00,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-02-14 22:08:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 22:08:00,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:00,122 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:00,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 22:08:00,328 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,SelfDestructingSolverStorable10 [2023-02-14 22:08:00,328 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 3 times [2023-02-14 22:08:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:00,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902465970] [2023-02-14 22:08:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:00,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:00,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:00,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831115990] [2023-02-14 22:08:00,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 22:08:00,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:00,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:00,345 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:08:00,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 22:08:00,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 22:08:00,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:08:00,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-14 22:08:00,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:00,555 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-02-14 22:08:00,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-02-14 22:08:00,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2023-02-14 22:08:00,587 INFO L321 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-02-14 22:08:00,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 68 [2023-02-14 22:08:00,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:08:00,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:08:00,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 51 [2023-02-14 22:08:00,654 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:08:00,656 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:08:00,657 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2023-02-14 22:08:00,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 64 [2023-02-14 22:08:00,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:08:00,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 22:08:00,779 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 22:08:00,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2023-02-14 22:08:00,786 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:08:00,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:00,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:00,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2023-02-14 22:08:00,813 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 22:08:00,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:00,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:00,887 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 22:08:00,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 42 [2023-02-14 22:08:00,970 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 22:08:00,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 137 [2023-02-14 22:08:00,978 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:08:00,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:00,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:00,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:00,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2023-02-14 22:08:01,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:01,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:01,095 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:08:01,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:01,099 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-02-14 22:08:01,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 56 [2023-02-14 22:08:01,373 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-02-14 22:08:01,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 40 [2023-02-14 22:08:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:01,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:08:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:09,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:09,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902465970] [2023-02-14 22:08:09,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:09,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831115990] [2023-02-14 22:08:09,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831115990] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:08:09,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:08:09,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-02-14 22:08:09,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525893527] [2023-02-14 22:08:09,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:08:09,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 22:08:09,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 22:08:09,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-02-14 22:08:09,305 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:22,351 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse68 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse67 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse69 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse8 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse18 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse30 (* 8 .cse67)) (.cse65 (* .cse68 8))) (let ((.cse63 (+ .cse65 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse64 (select .cse18 (+ .cse30 |c_ULTIMATE.start_main_~b~0#1.offset|))) (.cse56 (select .cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse30))) (.cse0 (<= .cse69 2147483647)) (.cse66 (* .cse69 8)) (.cse55 (<= .cse68 2147483647))) (let ((.cse23 (<= .cse67 2147483647)) (.cse10 (not .cse55)) (.cse37 (+ .cse66 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse31 (not .cse0)) (.cse9 (+ .cse66 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse4 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse6 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse29 (+ .cse65 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse62 (+ .cse66 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse22 (store .cse18 .cse63 (+ .cse64 .cse56))) (.cse16 (+ .cse65 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse21 (+ 16 |c_ULTIMATE.start_main_~b~0#1.offset|))) (and (or .cse0 (forall ((v_ArrVal_431 Int)) (= 13 (let ((.cse7 (store .cse8 .cse9 v_ArrVal_431))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse7))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse1 (select .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (select .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse3 .cse4 (+ .cse1 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse5)))))))) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 1) (or .cse10 (forall ((v_ArrVal_431 Int)) (= (let ((.cse15 (store .cse8 .cse16 v_ArrVal_431))) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse15))) (let ((.cse13 (select .cse12 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse11 (select .cse15 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse14 (select .cse13 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse11 (select (select (store .cse12 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse13 .cse4 (+ .cse11 .cse14))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse14))))) 13))) (exists ((|ULTIMATE.start_main_~a~0#1.base| Int)) (let ((.cse20 (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse17 (select .cse18 .cse21)) (.cse19 (select .cse20 8))) (and (= .cse17 (+ (select .cse18 .cse4) .cse19)) (= (select .cse20 0) 4) (= .cse17 (+ 5 .cse19)) (= 8 .cse19))))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select .cse22 .cse21) 13) (= (select .cse18 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (or .cse23 (and (forall ((v_ArrVal_431 Int)) (= (let ((.cse28 (store (store .cse8 .cse29 (+ (select .cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse30)) 4)) .cse9 v_ArrVal_431))) (let ((.cse25 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse28))) (let ((.cse26 (select .cse25 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse24 (select .cse26 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse27 (select .cse28 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse24 (select (select (store .cse25 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse26 .cse4 (+ .cse24 .cse27))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse27))))) 13)) .cse31)) (= (select .cse8 .cse6) 8) (or (forall ((v_ArrVal_431 Int)) (= (let ((.cse36 (store .cse8 .cse37 v_ArrVal_431))) (let ((.cse34 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse36))) (let ((.cse35 (select .cse34 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse32 (select .cse35 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse33 (select .cse36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse32 .cse33 (select (select (store .cse34 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse35 .cse4 (+ .cse32 .cse33))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6)))))) 13)) .cse31) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (or (not .cse23) (let ((.cse49 (+ 4 .cse56))) (and (or .cse10 (let ((.cse43 (store .cse8 .cse16 .cse49))) (and (or .cse0 (forall ((v_ArrVal_431 Int)) (= 13 (let ((.cse42 (store .cse43 .cse9 v_ArrVal_431))) (let ((.cse40 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse42))) (let ((.cse41 (select .cse40 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse38 (select .cse41 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse39 (select .cse42 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse38 .cse39 (select (select (store .cse40 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse41 .cse4 (+ .cse38 .cse39))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))))))))) (or (forall ((v_ArrVal_431 Int)) (= (let ((.cse48 (store .cse43 .cse37 v_ArrVal_431))) (let ((.cse46 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse48))) (let ((.cse47 (select .cse46 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse44 (select .cse47 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse45 (select .cse48 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse44 .cse45 (select (select (store .cse46 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse47 .cse4 (+ .cse44 .cse45))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6)))))) 13)) .cse31)))) (or (forall ((v_ArrVal_431 Int)) (= (let ((.cse54 (store (store .cse8 .cse29 .cse49) .cse9 v_ArrVal_431))) (let ((.cse51 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse54))) (let ((.cse52 (select .cse51 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse50 (select .cse52 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse53 (select .cse54 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse50 (select (select (store .cse51 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse52 .cse4 (+ .cse50 .cse53))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse53))))) 13)) .cse55)))) (or (forall ((v_ArrVal_431 Int)) (= (let ((.cse61 (store .cse8 .cse29 v_ArrVal_431))) (let ((.cse59 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse61))) (let ((.cse60 (select .cse59 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse57 (select .cse61 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse58 (select .cse60 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse57 .cse58 (select (select (store .cse59 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse60 .cse4 (+ .cse57 .cse58))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6)))))) 13)) .cse55) (= (select (store .cse18 .cse62 (+ (select .cse18 .cse63) (select .cse8 .cse16))) .cse21) 13) (= 4 (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (= 13 (select (store .cse22 .cse62 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse22) |c_ULTIMATE.start_main_~a~0#1.base|) .cse16) .cse64 .cse56)) .cse21))))))) is different from true [2023-02-14 22:08:24,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:08:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:27,093 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2023-02-14 22:08:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 22:08:27,094 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-14 22:08:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:27,094 INFO L225 Difference]: With dead ends: 111 [2023-02-14 22:08:27,094 INFO L226 Difference]: Without dead ends: 109 [2023-02-14 22:08:27,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=376, Invalid=1696, Unknown=2, NotChecked=88, Total=2162 [2023-02-14 22:08:27,096 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 124 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 65 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:27,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 182 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 360 Invalid, 1 Unknown, 16 Unchecked, 6.2s Time] [2023-02-14 22:08:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-14 22:08:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2023-02-14 22:08:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 77 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2023-02-14 22:08:27,115 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 28 [2023-02-14 22:08:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:27,115 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2023-02-14 22:08:27,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2023-02-14 22:08:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 22:08:27,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:27,116 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:27,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-14 22:08:27,323 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,SelfDestructingSolverStorable11 [2023-02-14 22:08:27,323 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:27,323 INFO L85 PathProgramCache]: Analyzing trace with hash -412561416, now seen corresponding path program 4 times [2023-02-14 22:08:27,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:27,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858769445] [2023-02-14 22:08:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:27,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:27,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:27,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876325661] [2023-02-14 22:08:27,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 22:08:27,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:27,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:27,341 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:08:27,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 22:08:27,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 22:08:27,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:08:27,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 22:08:27,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:08:27,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:08:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:08:27,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858769445] [2023-02-14 22:08:27,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876325661] [2023-02-14 22:08:27,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876325661] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:08:27,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:08:27,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-02-14 22:08:27,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425770585] [2023-02-14 22:08:27,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:08:27,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 22:08:27,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 22:08:27,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-02-14 22:08:27,591 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:27,797 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2023-02-14 22:08:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 22:08:27,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-14 22:08:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:27,799 INFO L225 Difference]: With dead ends: 118 [2023-02-14 22:08:27,799 INFO L226 Difference]: Without dead ends: 92 [2023-02-14 22:08:27,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2023-02-14 22:08:27,801 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:27,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 68 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:08:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-14 22:08:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2023-02-14 22:08:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 71 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2023-02-14 22:08:27,829 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 32 [2023-02-14 22:08:27,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:27,829 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2023-02-14 22:08:27,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2023-02-14 22:08:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 22:08:27,835 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:27,835 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:27,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 22:08:28,040 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,SelfDestructingSolverStorable12 [2023-02-14 22:08:28,040 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:28,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1680698556, now seen corresponding path program 5 times [2023-02-14 22:08:28,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:28,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880195516] [2023-02-14 22:08:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:28,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:28,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:28,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998581553] [2023-02-14 22:08:28,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 22:08:28,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:28,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:28,073 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:08:28,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process