./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/ifeqn2.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 cb71614531ba069deddebdade1f57f90be50d3de3732c63efbb92b9f6b8c62e1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:00:17,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:00:17,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:00:17,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:00:17,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:00:17,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:00:17,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:00:17,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:00:17,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:00:17,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:00:17,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:00:17,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:00:17,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:00:17,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:00:17,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:00:17,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:00:17,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:00:17,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:00:17,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:00:17,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:00:17,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:00:17,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:00:17,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:00:17,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:00:17,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:00:17,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:00:17,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:00:17,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:00:17,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:00:17,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:00:17,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:00:17,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:00:17,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:00:17,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:00:17,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:00:17,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:00:17,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:00:17,467 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:00:17,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:00:17,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:00:17,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:00:17,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:00:17,504 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:00:17,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:00:17,508 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:00:17,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:00:17,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:00:17,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:00:17,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:00:17,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:00:17,510 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:00:17,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:00:17,511 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:00:17,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:00:17,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:00:17,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:00:17,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:00:17,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:00:17,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:00:17,513 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:00:17,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:00:17,513 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:00:17,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:00:17,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:00:17,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:00:17,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:00:17,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:00:17,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:00:17,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:00:17,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:00:17,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:00:17,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:00:17,515 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:00:17,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:00:17,515 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:00:17,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:00:17,516 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:00:17,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb71614531ba069deddebdade1f57f90be50d3de3732c63efbb92b9f6b8c62e1 [2023-02-15 10:00:17,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:00:17,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:00:17,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:00:17,787 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:00:17,788 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:00:17,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn2.c [2023-02-15 10:00:19,039 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:00:19,249 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:00:19,249 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn2.c [2023-02-15 10:00:19,255 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4af03a00c/2fad72884b45401bba3d5306d40eaf01/FLAG0135ceab8 [2023-02-15 10:00:19,271 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4af03a00c/2fad72884b45401bba3d5306d40eaf01 [2023-02-15 10:00:19,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:00:19,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:00:19,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:00:19,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:00:19,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:00:19,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16358701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19, skipping insertion in model container [2023-02-15 10:00:19,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:00:19,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:00:19,439 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/ifeqn2.c[589,602] [2023-02-15 10:00:19,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:00:19,482 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:00:19,491 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/ifeqn2.c[589,602] [2023-02-15 10:00:19,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:00:19,509 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:00:19,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19 WrapperNode [2023-02-15 10:00:19,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:00:19,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:00:19,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:00:19,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:00:19,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,537 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-02-15 10:00:19,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:00:19,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:00:19,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:00:19,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:00:19,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,560 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:00:19,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:00:19,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:00:19,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:00:19,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (1/1) ... [2023-02-15 10:00:19,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:00:19,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:19,599 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) [2023-02-15 10:00:19,608 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 [2023-02-15 10:00:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:00:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:00:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 10:00:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 10:00:19,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:00:19,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:00:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 10:00:19,696 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:00:19,698 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:00:19,869 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:00:19,875 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:00:19,875 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 10:00:19,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:00:19 BoogieIcfgContainer [2023-02-15 10:00:19,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:00:19,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:00:19,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:00:19,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:00:19,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:00:19" (1/3) ... [2023-02-15 10:00:19,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc96641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:00:19, skipping insertion in model container [2023-02-15 10:00:19,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:00:19" (2/3) ... [2023-02-15 10:00:19,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc96641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:00:19, skipping insertion in model container [2023-02-15 10:00:19,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:00:19" (3/3) ... [2023-02-15 10:00:19,904 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn2.c [2023-02-15 10:00:19,935 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:00:19,935 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:00:19,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:00:20,005 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;@7223721f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:00:20,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:00:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) [2023-02-15 10:00:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 10:00:20,014 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:00:20,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:00:20,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:00:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:00:20,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2023-02-15 10:00:20,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:00:20,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5623696] [2023-02-15 10:00:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:20,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:00:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:00:20,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:00:20,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5623696] [2023-02-15 10:00:20,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 10:00:20,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052762192] [2023-02-15 10:00:20,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:20,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:00:20,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:20,157 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) [2023-02-15 10:00:20,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 10:00:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:00:20,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 10:00:20,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:00:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:00:20,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:00:20,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052762192] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:00:20,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:00:20,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 10:00:20,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107341063] [2023-02-15 10:00:20,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:00:20,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 10:00:20,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:00:20,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 10:00:20,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:00:20,319 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) 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) [2023-02-15 10:00:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:00:20,330 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2023-02-15 10:00:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 10:00:20,332 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 [2023-02-15 10:00:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:00:20,337 INFO L225 Difference]: With dead ends: 42 [2023-02-15 10:00:20,338 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 10:00:20,340 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 [2023-02-15 10:00:20,342 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2023-02-15 10:00:20,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:00:20,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 10:00:20,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 10:00:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2023-02-15 10:00:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-15 10:00:20,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-02-15 10:00:20,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:00:20,366 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-15 10:00:20,367 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) [2023-02-15 10:00:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-15 10:00:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 10:00:20,367 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:00:20,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:00:20,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 10:00:20,568 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 [2023-02-15 10:00:20,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:00:20,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:00:20,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2023-02-15 10:00:20,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:00:20,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183729427] [2023-02-15 10:00:20,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:20,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:00:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:00:20,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:00:20,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183729427] [2023-02-15 10:00:20,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 10:00:20,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889189322] [2023-02-15 10:00:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:20,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:00:20,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:20,615 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) [2023-02-15 10:00:20,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 10:00:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:00:20,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 10:00:20,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:00:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:00:20,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:00:20,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889189322] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:00:20,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:00:20,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:00:20,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140602367] [2023-02-15 10:00:20,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:00:20,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:00:20,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:00:20,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:00:20,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:00:20,724 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2023-02-15 10:00:20,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:00:20,771 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-15 10:00:20,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:00:20,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2023-02-15 10:00:20,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:00:20,772 INFO L225 Difference]: With dead ends: 42 [2023-02-15 10:00:20,772 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 10:00:20,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:00:20,774 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:00:20,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:00:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 10:00:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2023-02-15 10:00:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:00:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-15 10:00:20,779 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-02-15 10:00:20,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:00:20,780 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-15 10:00:20,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2023-02-15 10:00:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-15 10:00:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 10:00:20,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:00:20,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:00:20,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 10:00:20,986 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 [2023-02-15 10:00:20,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:00:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:00:20,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2023-02-15 10:00:20,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:00:20,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622635872] [2023-02-15 10:00:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:20,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:00:21,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:00:21,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745015830] [2023-02-15 10:00:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:21,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:00:21,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:21,031 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) [2023-02-15 10:00:21,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 10:00:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:00:21,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 10:00:21,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:00:21,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 10:00:21,171 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 [2023-02-15 10:00:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 10:00:21,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:00:21,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:00:21,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622635872] [2023-02-15 10:00:21,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:00:21,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745015830] [2023-02-15 10:00:21,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745015830] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:00:21,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:00:21,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:00:21,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916107211] [2023-02-15 10:00:21,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:00:21,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:00:21,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:00:21,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:00:21,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:00:21,182 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-02-15 10:00:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:00:21,264 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-02-15 10:00:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 10:00:21,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-15 10:00:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:00:21,267 INFO L225 Difference]: With dead ends: 38 [2023-02-15 10:00:21,268 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 10:00:21,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:00:21,273 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:00:21,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:00:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 10:00:21,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2023-02-15 10:00:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-02-15 10:00:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-15 10:00:21,289 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2023-02-15 10:00:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:00:21,292 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-15 10:00:21,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-02-15 10:00:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-15 10:00:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 10:00:21,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:00:21,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:00:21,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 10:00:21,499 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 [2023-02-15 10:00:21,500 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:00:21,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:00:21,501 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2023-02-15 10:00:21,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:00:21,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408224829] [2023-02-15 10:00:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:21,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:00:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:00:21,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:00:21,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408224829] [2023-02-15 10:00:21,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 10:00:21,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601723517] [2023-02-15 10:00:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:21,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:00:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:21,565 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) [2023-02-15 10:00:21,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 10:00:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:00:21,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 10:00:21,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:00:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 10:00:21,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:00:21,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601723517] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:00:21,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:00:21,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:00:21,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699569074] [2023-02-15 10:00:21,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:00:21,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:00:21,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:00:21,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:00:21,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:00:21,628 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-02-15 10:00:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:00:21,667 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-15 10:00:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:00:21,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-15 10:00:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:00:21,668 INFO L225 Difference]: With dead ends: 55 [2023-02-15 10:00:21,668 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 10:00:21,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:00:21,669 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:00:21,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:00:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 10:00:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-02-15 10:00:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2023-02-15 10:00:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-02-15 10:00:21,674 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2023-02-15 10:00:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:00:21,675 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-02-15 10:00:21,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-02-15 10:00:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-02-15 10:00:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 10:00:21,676 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:00:21,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:00:21,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 10:00:21,881 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 [2023-02-15 10:00:21,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:00:21,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:00:21,882 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2023-02-15 10:00:21,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:00:21,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476303579] [2023-02-15 10:00:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:21,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:00:21,925 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:00:21,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760191175] [2023-02-15 10:00:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:21,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:00:21,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:21,937 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) [2023-02-15 10:00:21,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 10:00:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:00:22,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 10:00:22,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:00:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:00:22,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:00:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:00:22,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:00:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476303579] [2023-02-15 10:00:22,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:00:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760191175] [2023-02-15 10:00:22,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760191175] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:00:22,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:00:22,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 10:00:22,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870351136] [2023-02-15 10:00:22,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:00:22,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:00:22,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:00:22,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:00:22,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:00:22,122 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2023-02-15 10:00:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:00:22,257 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2023-02-15 10:00:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:00:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) Word has length 21 [2023-02-15 10:00:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:00:22,260 INFO L225 Difference]: With dead ends: 70 [2023-02-15 10:00:22,260 INFO L226 Difference]: Without dead ends: 43 [2023-02-15 10:00:22,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:00:22,262 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:00:22,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:00:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-15 10:00:22,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2023-02-15 10:00:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2023-02-15 10:00:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-02-15 10:00:22,271 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2023-02-15 10:00:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:00:22,272 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-02-15 10:00:22,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2023-02-15 10:00:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-02-15 10:00:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 10:00:22,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:00:22,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:00:22,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 10:00:22,478 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 [2023-02-15 10:00:22,479 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:00:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:00:22,479 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2023-02-15 10:00:22,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:00:22,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172138177] [2023-02-15 10:00:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:22,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:00:22,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:00:22,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832432096] [2023-02-15 10:00:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:22,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:00:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:22,517 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) [2023-02-15 10:00:22,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 10:00:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:00:22,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 10:00:22,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:00:22,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 10:00:22,670 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 [2023-02-15 10:00:22,696 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 [2023-02-15 10:00:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:00:22,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:00:22,883 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 21 treesize of output 19 [2023-02-15 10:00:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 10:00:22,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:00:22,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172138177] [2023-02-15 10:00:22,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:00:22,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832432096] [2023-02-15 10:00:22,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832432096] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:00:22,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:00:22,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-02-15 10:00:22,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801613925] [2023-02-15 10:00:22,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:00:22,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 10:00:22,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:00:22,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 10:00:22,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:00:22,907 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:00:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:00:23,298 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2023-02-15 10:00:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 10:00:23,299 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-15 10:00:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:00:23,300 INFO L225 Difference]: With dead ends: 112 [2023-02-15 10:00:23,300 INFO L226 Difference]: Without dead ends: 92 [2023-02-15 10:00:23,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-02-15 10:00:23,301 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:00:23,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 105 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:00:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-15 10:00:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2023-02-15 10:00:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:00:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-15 10:00:23,313 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2023-02-15 10:00:23,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:00:23,315 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-15 10:00:23,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:00:23,315 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-15 10:00:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 10:00:23,316 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:00:23,316 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:00:23,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 10:00:23,522 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 [2023-02-15 10:00:23,522 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:00:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:00:23,523 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2023-02-15 10:00:23,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:00:23,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513319899] [2023-02-15 10:00:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:23,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:00:23,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:00:23,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020867927] [2023-02-15 10:00:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:23,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:00:23,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:23,573 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) [2023-02-15 10:00:23,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 10:00:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:00:23,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 10:00:23,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:00:23,698 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 [2023-02-15 10:00:23,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 10:00:23,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:23,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 10:00:23,835 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 19 treesize of output 18 [2023-02-15 10:00:23,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:23,905 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:00:23,905 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 38 treesize of output 32 [2023-02-15 10:00:24,040 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:00:24,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2023-02-15 10:00:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:00:24,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:00:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:00:24,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:00:24,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513319899] [2023-02-15 10:00:24,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:00:24,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020867927] [2023-02-15 10:00:24,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020867927] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:00:24,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:00:24,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-02-15 10:00:24,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651964489] [2023-02-15 10:00:24,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:00:24,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 10:00:24,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:00:24,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 10:00:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-02-15 10:00:24,791 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2023-02-15 10:00:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:00:32,732 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2023-02-15 10:00:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-15 10:00:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 [2023-02-15 10:00:32,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:00:32,735 INFO L225 Difference]: With dead ends: 175 [2023-02-15 10:00:32,735 INFO L226 Difference]: Without dead ends: 173 [2023-02-15 10:00:32,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=683, Invalid=2287, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 10:00:32,736 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 449 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-15 10:00:32,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 189 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-15 10:00:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-15 10:00:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 80. [2023-02-15 10:00:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:00:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-02-15 10:00:32,759 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 28 [2023-02-15 10:00:32,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:00:32,760 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-02-15 10:00:32,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2023-02-15 10:00:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-02-15 10:00:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 10:00:32,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:00:32,762 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:00:32,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 10:00:32,962 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 [2023-02-15 10:00:32,963 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:00:32,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:00:32,963 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2023-02-15 10:00:32,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:00:32,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240268297] [2023-02-15 10:00:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:32,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:00:32,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:00:32,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173816229] [2023-02-15 10:00:32,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:00:32,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:00:32,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:32,989 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) [2023-02-15 10:00:32,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 10:00:33,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:00:33,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:00:33,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 10:00:33,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:00:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 10:00:33,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:00:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 10:00:33,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:00:33,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240268297] [2023-02-15 10:00:33,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:00:33,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173816229] [2023-02-15 10:00:33,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173816229] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:00:33,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:00:33,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-15 10:00:33,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12606825] [2023-02-15 10:00:33,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:00:33,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 10:00:33,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:00:33,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 10:00:33,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:00:33,218 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:00:33,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:00:33,356 INFO L93 Difference]: Finished difference Result 190 states and 228 transitions. [2023-02-15 10:00:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 10:00:33,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-15 10:00:33,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:00:33,358 INFO L225 Difference]: With dead ends: 190 [2023-02-15 10:00:33,358 INFO L226 Difference]: Without dead ends: 122 [2023-02-15 10:00:33,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-15 10:00:33,359 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:00:33,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 59 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:00:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-15 10:00:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2023-02-15 10:00:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.21875) internal successors, (117), 96 states have internal predecessors, (117), 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) [2023-02-15 10:00:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2023-02-15 10:00:33,373 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 32 [2023-02-15 10:00:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:00:33,373 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2023-02-15 10:00:33,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:00:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2023-02-15 10:00:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 10:00:33,374 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:00:33,374 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:00:33,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 10:00:33,582 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 [2023-02-15 10:00:33,583 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:00:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:00:33,584 INFO L85 PathProgramCache]: Analyzing trace with hash -187195163, now seen corresponding path program 2 times [2023-02-15 10:00:33,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:00:33,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89604650] [2023-02-15 10:00:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:33,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:00:33,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:00:33,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188241152] [2023-02-15 10:00:33,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:00:33,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:00:33,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:33,617 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) [2023-02-15 10:00:33,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 10:00:33,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:00:33,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:00:33,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 10:00:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:00:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 10:00:33,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:00:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 10:00:33,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:00:33,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89604650] [2023-02-15 10:00:33,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:00:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188241152] [2023-02-15 10:00:33,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188241152] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:00:33,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:00:33,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-15 10:00:33,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480064951] [2023-02-15 10:00:33,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:00:33,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 10:00:33,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:00:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 10:00:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:00:33,857 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:00:34,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:00:34,110 INFO L93 Difference]: Finished difference Result 236 states and 273 transitions. [2023-02-15 10:00:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 10:00:34,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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 36 [2023-02-15 10:00:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:00:34,112 INFO L225 Difference]: With dead ends: 236 [2023-02-15 10:00:34,112 INFO L226 Difference]: Without dead ends: 177 [2023-02-15 10:00:34,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-02-15 10:00:34,113 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 141 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:00:34,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 92 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:00:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-15 10:00:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2023-02-15 10:00:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 133 states have internal predecessors, (158), 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) [2023-02-15 10:00:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2023-02-15 10:00:34,130 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 36 [2023-02-15 10:00:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:00:34,130 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2023-02-15 10:00:34,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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) [2023-02-15 10:00:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2023-02-15 10:00:34,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 10:00:34,132 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:00:34,132 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:00:34,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 10:00:34,337 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 [2023-02-15 10:00:34,337 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:00:34,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:00:34,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1173959464, now seen corresponding path program 3 times [2023-02-15 10:00:34,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:00:34,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072715174] [2023-02-15 10:00:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:34,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:00:34,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:00:34,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95293477] [2023-02-15 10:00:34,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 10:00:34,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:00:34,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:34,373 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) [2023-02-15 10:00:34,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 10:00:34,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 10:00:34,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:00:34,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 10:00:34,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:00:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:00:34,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:00:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:00:34,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:00:34,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072715174] [2023-02-15 10:00:34,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:00:34,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95293477] [2023-02-15 10:00:34,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95293477] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:00:34,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:00:34,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-02-15 10:00:34,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598259115] [2023-02-15 10:00:34,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:00:34,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 10:00:34,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:00:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 10:00:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-02-15 10:00:34,733 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:00:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:00:35,302 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2023-02-15 10:00:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 10:00:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-15 10:00:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:00:35,303 INFO L225 Difference]: With dead ends: 171 [2023-02-15 10:00:35,304 INFO L226 Difference]: Without dead ends: 162 [2023-02-15 10:00:35,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 10:00:35,306 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 147 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:00:35,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 92 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:00:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-15 10:00:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2023-02-15 10:00:35,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 133 states have internal predecessors, (156), 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) [2023-02-15 10:00:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2023-02-15 10:00:35,323 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 37 [2023-02-15 10:00:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:00:35,324 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2023-02-15 10:00:35,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:00:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2023-02-15 10:00:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 10:00:35,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:00:35,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:00:35,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 10:00:35,530 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 [2023-02-15 10:00:35,530 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:00:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:00:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 4 times [2023-02-15 10:00:35,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:00:35,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508753064] [2023-02-15 10:00:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:00:35,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:00:35,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:00:35,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498536952] [2023-02-15 10:00:35,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 10:00:35,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:00:35,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:00:35,548 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) [2023-02-15 10:00:35,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 10:00:35,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 10:00:35,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:00:35,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-15 10:00:35,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:00:35,768 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 [2023-02-15 10:00:35,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 10:00:35,836 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 110 treesize of output 99 [2023-02-15 10:00:35,841 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:00:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:35,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:35,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:35,846 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 [2023-02-15 10:00:35,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:35,890 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 106 treesize of output 47 [2023-02-15 10:00:35,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:35,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:35,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-02-15 10:00:36,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:36,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-02-15 10:00:36,129 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:00:36,129 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 [2023-02-15 10:00:36,142 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:00:36,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:36,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:36,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:36,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:36,147 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 [2023-02-15 10:00:36,154 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:00:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:36,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:36,290 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:00:36,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:00:36,294 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-02-15 10:00:36,295 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 [2023-02-15 10:00:36,563 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-02-15 10:00:36,564 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 72 treesize of output 40 [2023-02-15 10:00:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:00:36,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:00:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:00:44,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:00:44,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508753064] [2023-02-15 10:00:44,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:00:44,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498536952] [2023-02-15 10:00:44,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498536952] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:00:44,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:00:44,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2023-02-15 10:00:44,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543855974] [2023-02-15 10:00:44,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:00:44,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 10:00:44,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:00:44,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 10:00:44,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 10:00:44,481 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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) [2023-02-15 10:00:58,109 WARN L233 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 223 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:01:17,042 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse46 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse29 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse47 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse44 (* .cse46 8))) (let ((.cse7 (+ .cse44 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (+ .cse44 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse51 (* (mod .cse47 4294967296) 8)) (.cse16 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse23 (* 8 .cse29))) (let ((.cse14 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse48 (select .cse9 (+ .cse23 |c_ULTIMATE.start_main_~b~0#1.offset|))) (.cse28 (select .cse16 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse23))) (.cse6 (+ .cse51 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse34 (select .cse9 .cse8)) (.cse35 (select .cse16 .cse7)) (.cse15 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse45 (* 8 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)))) (let ((.cse1 (+ .cse45 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse32 (select .cse16 .cse15)) (.cse33 (store .cse9 .cse6 (+ .cse34 .cse35))) (.cse2 (+ .cse51 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse30 (store .cse9 .cse8 (+ .cse48 .cse28))) (.cse10 (+ 16 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse31 (select .cse9 .cse14))) (and (= 13 (select (let ((.cse5 (store .cse9 |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse3 (select .cse5 .cse8)) (.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse5) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse0 (store .cse5 .cse6 (+ .cse3 .cse4)))) (store .cse0 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) .cse3 .cse4))))) .cse10)) (forall ((v_ArrVal_291 Int)) (= (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse16 .cse2 v_ArrVal_291)))) (let ((.cse13 (store (select .cse12 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse11 (select (select (store .cse12 |c_ULTIMATE.start_main_~b~0#1.base| .cse13) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse11 (select (select (store .cse12 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse13 .cse14 (+ .cse11 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12)) (forall ((v_ArrVal_291 Int)) (= (let ((.cse18 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse16 .cse7 v_ArrVal_291)))) (let ((.cse19 (store (select .cse18 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse17 (select (select (store .cse18 |c_ULTIMATE.start_main_~b~0#1.base| .cse19) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse17 (select (select (store .cse18 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse19 .cse14 (+ .cse17 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12)) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 1) (or (= |c_ULTIMATE.start_main_~i~0#1| 0) (let ((.cse24 (<= .cse29 2147483647))) (and (or (forall ((v_ArrVal_291 Int)) (= (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse16 .cse7 (+ (select .cse16 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse23)) 4)) .cse2 v_ArrVal_291)))) (let ((.cse22 (store (select .cse21 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse20 (select (select (store .cse21 |c_ULTIMATE.start_main_~b~0#1.base| .cse22) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse20 (select (select (store .cse21 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse22 .cse14 (+ .cse20 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12)) .cse24) (or (forall ((v_ArrVal_291 Int)) (= (let ((.cse26 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse16 .cse7 (+ 4 .cse28)) .cse2 v_ArrVal_291)))) (let ((.cse27 (store (select .cse26 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse25 (select (select (store .cse26 |c_ULTIMATE.start_main_~b~0#1.base| .cse27) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse25 (select (select (store .cse26 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse27 .cse14 (+ .cse25 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12)) (not .cse24))))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select .cse30 .cse10) 13) (= (select .cse9 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= (select .cse9 .cse10) (+ .cse31 8)) (= .cse32 8) (= 13 (select (store .cse33 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse33) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) .cse34 .cse35)) .cse10)) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (+ 4 (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|)) .cse32) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select .cse33 .cse10) 13) (or (let ((.cse36 (<= .cse46 2147483647)) (.cse40 (+ .cse45 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (not .cse36) (forall ((v_ArrVal_291 Int)) (= (let ((.cse38 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse16 .cse2 (+ 4 .cse35)) .cse40 v_ArrVal_291)))) (let ((.cse39 (store (select .cse38 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse37 (select (select (store .cse38 |c_ULTIMATE.start_main_~b~0#1.base| .cse39) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse37 (select (select (store .cse38 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse39 .cse14 (+ .cse37 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12))) (or .cse36 (forall ((v_ArrVal_291 Int)) (= (let ((.cse42 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse16 .cse2 (+ (select .cse16 (+ .cse44 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) 4)) .cse40 v_ArrVal_291)))) (let ((.cse43 (store (select .cse42 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse41 (select (select (store .cse42 |c_ULTIMATE.start_main_~b~0#1.base| .cse43) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse41 (select (select (store .cse42 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse43 .cse14 (+ .cse41 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12))))) (= .cse47 0)) (= 13 (select (store .cse30 .cse6 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse30) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7) .cse48 .cse28)) .cse10)) (exists ((|ULTIMATE.start_main_~a~0#1.base| Int)) (let ((.cse50 (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse49 (select .cse50 0))) (and (= .cse49 4) (= (+ .cse49 1) .cse31) (= 8 (select .cse50 8)))))))))))) is different from true [2023-02-15 10:01:28,845 WARN L233 SmtUtils]: Spent 8.54s on a formula simplification. DAG size of input: 213 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:01:42,107 WARN L233 SmtUtils]: Spent 9.67s on a formula simplification. DAG size of input: 211 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:01:44,485 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse45 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse29 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse46 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse43 (* .cse45 8))) (let ((.cse7 (+ .cse43 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (+ .cse43 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse48 (* (mod .cse46 4294967296) 8)) (.cse16 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse23 (* 8 .cse29))) (let ((.cse47 (select .cse9 (+ .cse23 |c_ULTIMATE.start_main_~b~0#1.offset|))) (.cse28 (select .cse16 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse23))) (.cse6 (+ .cse48 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse33 (select .cse9 .cse8)) (.cse34 (select .cse16 .cse7)) (.cse15 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse44 (* 8 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)))) (let ((.cse1 (+ .cse44 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse31 (select .cse16 .cse15)) (.cse32 (store .cse9 .cse6 (+ .cse33 .cse34))) (.cse14 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse2 (+ .cse48 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse30 (store .cse9 .cse8 (+ .cse47 .cse28))) (.cse10 (+ 16 |c_ULTIMATE.start_main_~b~0#1.offset|))) (and (= 13 (select (let ((.cse5 (store .cse9 |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse3 (select .cse5 .cse8)) (.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse5) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse0 (store .cse5 .cse6 (+ .cse3 .cse4)))) (store .cse0 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) .cse3 .cse4))))) .cse10)) (forall ((v_ArrVal_291 Int)) (= (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse16 .cse2 v_ArrVal_291)))) (let ((.cse13 (store (select .cse12 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse11 (select (select (store .cse12 |c_ULTIMATE.start_main_~b~0#1.base| .cse13) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse11 (select (select (store .cse12 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse13 .cse14 (+ .cse11 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12)) (forall ((v_ArrVal_291 Int)) (= (let ((.cse18 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse16 .cse7 v_ArrVal_291)))) (let ((.cse19 (store (select .cse18 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse17 (select (select (store .cse18 |c_ULTIMATE.start_main_~b~0#1.base| .cse19) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse17 (select (select (store .cse18 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse19 .cse14 (+ .cse17 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12)) (or (= |c_ULTIMATE.start_main_~i~0#1| 0) (let ((.cse24 (<= .cse29 2147483647))) (and (or (forall ((v_ArrVal_291 Int)) (= (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse16 .cse7 (+ (select .cse16 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse23)) 4)) .cse2 v_ArrVal_291)))) (let ((.cse22 (store (select .cse21 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse20 (select (select (store .cse21 |c_ULTIMATE.start_main_~b~0#1.base| .cse22) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse20 (select (select (store .cse21 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse22 .cse14 (+ .cse20 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12)) .cse24) (or (forall ((v_ArrVal_291 Int)) (= (let ((.cse26 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse16 .cse7 (+ 4 .cse28)) .cse2 v_ArrVal_291)))) (let ((.cse27 (store (select .cse26 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse25 (select (select (store .cse26 |c_ULTIMATE.start_main_~b~0#1.base| .cse27) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse25 (select (select (store .cse26 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse27 .cse14 (+ .cse25 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12)) (not .cse24))))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select .cse30 .cse10) 13) (= .cse31 8) (not (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (= 13 (select (store .cse32 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse32) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) .cse33 .cse34)) .cse10)) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (+ 4 (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|)) .cse31) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select .cse32 .cse10) 13) (or (let ((.cse35 (<= .cse45 2147483647)) (.cse39 (+ .cse44 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (not .cse35) (forall ((v_ArrVal_291 Int)) (= (let ((.cse37 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse16 .cse2 (+ 4 .cse34)) .cse39 v_ArrVal_291)))) (let ((.cse38 (store (select .cse37 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse36 (select (select (store .cse37 |c_ULTIMATE.start_main_~b~0#1.base| .cse38) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse36 (select (select (store .cse37 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse38 .cse14 (+ .cse36 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12))) (or .cse35 (forall ((v_ArrVal_291 Int)) (= (let ((.cse41 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse16 .cse2 (+ (select .cse16 (+ .cse43 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) 4)) .cse39 v_ArrVal_291)))) (let ((.cse42 (store (select .cse41 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse40 (select (select (store .cse41 |c_ULTIMATE.start_main_~b~0#1.base| .cse42) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse40 (select (select (store .cse41 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse42 .cse14 (+ .cse40 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))))) 12))))) (= .cse46 0)) (= 13 (select (store .cse30 .cse6 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse30) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7) .cse47 .cse28)) .cse10)) (= (select .cse9 .cse10) 13))))))) is different from true [2023-02-15 10:01:49,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:49,907 INFO L93 Difference]: Finished difference Result 451 states and 527 transitions. [2023-02-15 10:01:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 10:01:49,907 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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 38 [2023-02-15 10:01:49,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:49,908 INFO L225 Difference]: With dead ends: 451 [2023-02-15 10:01:49,909 INFO L226 Difference]: Without dead ends: 269 [2023-02-15 10:01:49,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 63.4s TimeCoverageRelationStatistics Valid=1012, Invalid=4396, Unknown=2, NotChecked=290, Total=5700 [2023-02-15 10:01:49,911 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 481 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:49,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 334 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 858 Invalid, 0 Unknown, 12 Unchecked, 9.3s Time] [2023-02-15 10:01:49,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-02-15 10:01:49,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 110. [2023-02-15 10:01:49,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.201834862385321) internal successors, (131), 109 states have internal predecessors, (131), 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) [2023-02-15 10:01:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2023-02-15 10:01:49,933 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 38 [2023-02-15 10:01:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:49,933 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2023-02-15 10:01:49,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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) [2023-02-15 10:01:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2023-02-15 10:01:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 10:01:49,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:49,935 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:49,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:50,140 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 [2023-02-15 10:01:50,141 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:50,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:50,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1616997781, now seen corresponding path program 3 times [2023-02-15 10:01:50,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:50,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546105864] [2023-02-15 10:01:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:50,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:50,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:50,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510942106] [2023-02-15 10:01:50,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 10:01:50,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:50,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:50,165 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) [2023-02-15 10:01:50,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 10:01:50,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-15 10:01:50,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:01:50,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 10:01:50,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:01:50,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:01:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:01:51,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:51,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546105864] [2023-02-15 10:01:51,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:01:51,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510942106] [2023-02-15 10:01:51,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510942106] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:01:51,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:01:51,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2023-02-15 10:01:51,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833909145] [2023-02-15 10:01:51,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:01:51,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 10:01:51,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 10:01:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-02-15 10:01:51,171 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:01:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:52,122 INFO L93 Difference]: Finished difference Result 283 states and 316 transitions. [2023-02-15 10:01:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 10:01:52,122 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-15 10:01:52,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:52,123 INFO L225 Difference]: With dead ends: 283 [2023-02-15 10:01:52,123 INFO L226 Difference]: Without dead ends: 247 [2023-02-15 10:01:52,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 10:01:52,125 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 380 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:52,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 415 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 10:01:52,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-02-15 10:01:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 140. [2023-02-15 10:01:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 139 states have internal predecessors, (164), 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) [2023-02-15 10:01:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 164 transitions. [2023-02-15 10:01:52,149 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 164 transitions. Word has length 45 [2023-02-15 10:01:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:52,149 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 164 transitions. [2023-02-15 10:01:52,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:01:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 164 transitions. [2023-02-15 10:01:52,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 10:01:52,150 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:52,150 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:52,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-15 10:01:52,357 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 [2023-02-15 10:01:52,358 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:52,358 INFO L85 PathProgramCache]: Analyzing trace with hash 58856955, now seen corresponding path program 5 times [2023-02-15 10:01:52,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:52,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75436413] [2023-02-15 10:01:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:52,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:52,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:52,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141672887] [2023-02-15 10:01:52,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 10:01:52,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:52,401 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) [2023-02-15 10:01:52,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 10:01:54,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-15 10:01:54,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:01:54,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 10:01:54,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 10:01:54,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:01:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 10:01:54,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75436413] [2023-02-15 10:01:54,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:01:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141672887] [2023-02-15 10:01:54,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141672887] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:01:54,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:01:54,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2023-02-15 10:01:54,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100531667] [2023-02-15 10:01:54,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:01:54,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 10:01:54,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 10:01:54,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-02-15 10:01:54,528 INFO L87 Difference]: Start difference. First operand 140 states and 164 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:01:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:55,167 INFO L93 Difference]: Finished difference Result 325 states and 375 transitions. [2023-02-15 10:01:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 10:01:55,167 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-15 10:01:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:55,168 INFO L225 Difference]: With dead ends: 325 [2023-02-15 10:01:55,168 INFO L226 Difference]: Without dead ends: 183 [2023-02-15 10:01:55,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=451, Invalid=1271, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 10:01:55,170 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 252 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:55,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 272 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 10:01:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-02-15 10:01:55,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2023-02-15 10:01:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 114 states have internal predecessors, (127), 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) [2023-02-15 10:01:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2023-02-15 10:01:55,194 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 46 [2023-02-15 10:01:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:55,194 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2023-02-15 10:01:55,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:01:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2023-02-15 10:01:55,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 10:01:55,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:55,195 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:55,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:55,397 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 [2023-02-15 10:01:55,397 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:55,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1846236060, now seen corresponding path program 6 times [2023-02-15 10:01:55,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:55,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424091303] [2023-02-15 10:01:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:55,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:55,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:55,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830427996] [2023-02-15 10:01:55,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 10:01:55,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:55,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:55,426 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) [2023-02-15 10:01:55,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 10:01:55,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 10:01:55,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:01:55,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-15 10:01:55,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:55,931 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 [2023-02-15 10:01:55,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 10:01:56,026 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 110 treesize of output 99 [2023-02-15 10:01:56,030 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:01:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,033 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 [2023-02-15 10:01:56,127 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 119 treesize of output 106 [2023-02-15 10:01:56,131 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:01:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 185 [2023-02-15 10:01:56,260 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 83 treesize of output 70 [2023-02-15 10:01:56,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 136 [2023-02-15 10:01:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 44 [2023-02-15 10:01:56,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2023-02-15 10:01:56,574 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:01:56,574 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 168 treesize of output 150 [2023-02-15 10:01:56,582 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:01:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,587 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 [2023-02-15 10:01:56,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 39 [2023-02-15 10:01:56,841 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:01:56,842 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 217 treesize of output 193 [2023-02-15 10:01:56,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 240 [2023-02-15 10:01:56,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 153 [2023-02-15 10:01:57,164 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:01:57,164 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 257 treesize of output 225 [2023-02-15 10:01:57,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 288 [2023-02-15 10:01:57,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 192 [2023-02-15 10:01:58,103 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-02-15 10:01:58,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 54 [2023-02-15 10:01:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:01:58,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:02:18,139 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 144 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:02:42,345 WARN L233 SmtUtils]: Spent 12.94s on a formula simplification. DAG size of input: 154 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:02:53,641 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 997146498910 treesize of output 967511578462 [2023-02-15 10:03:03,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:03:04,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 935650858846 treesize of output 823279818590