./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array6_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 10:14:46,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 10:14:46,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 10:14:46,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 10:14:46,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 10:14:46,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 10:14:46,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 10:14:46,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 10:14:46,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 10:14:46,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 10:14:46,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 10:14:46,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 10:14:46,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 10:14:46,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 10:14:46,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 10:14:46,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 10:14:46,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 10:14:46,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 10:14:46,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 10:14:46,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 10:14:46,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 10:14:46,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 10:14:46,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 10:14:46,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 10:14:46,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 10:14:46,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 10:14:46,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 10:14:46,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 10:14:46,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 10:14:46,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 10:14:46,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 10:14:46,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 10:14:46,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 10:14:46,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 10:14:46,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 10:14:46,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 10:14:46,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 10:14:46,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 10:14:46,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 10:14:46,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 10:14:46,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 10:14:46,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 10:14:46,530 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 10:14:46,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 10:14:46,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 10:14:46,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 10:14:46,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 10:14:46,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 10:14:46,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 10:14:46,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 10:14:46,533 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 10:14:46,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 10:14:46,534 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 10:14:46,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 10:14:46,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 10:14:46,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 10:14:46,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 10:14:46,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 10:14:46,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 10:14:46,535 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 10:14:46,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 10:14:46,535 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 10:14:46,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 10:14:46,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 10:14:46,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 10:14:46,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 10:14:46,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:14:46,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 10:14:46,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 10:14:46,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 10:14:46,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 10:14:46,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 10:14:46,537 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 10:14:46,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 10:14:46,538 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 10:14:46,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 10:14:46,538 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 10:14:46,538 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2023-02-14 10:14:46,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 10:14:46,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 10:14:46,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 10:14:46,770 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 10:14:46,770 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 10:14:46,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array6_pattern.c [2023-02-14 10:14:47,871 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 10:14:48,021 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 10:14:48,021 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array6_pattern.c [2023-02-14 10:14:48,026 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/955094189/fe6df12426f34fb3ac30e82bd180eab4/FLAG821e73742 [2023-02-14 10:14:48,037 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/955094189/fe6df12426f34fb3ac30e82bd180eab4 [2023-02-14 10:14:48,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 10:14:48,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 10:14:48,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 10:14:48,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 10:14:48,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 10:14:48,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bfd3d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48, skipping insertion in model container [2023-02-14 10:14:48,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 10:14:48,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 10:14:48,174 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-patterns/array6_pattern.c[1356,1369] [2023-02-14 10:14:48,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:14:48,195 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 10:14:48,204 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-patterns/array6_pattern.c[1356,1369] [2023-02-14 10:14:48,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:14:48,223 INFO L208 MainTranslator]: Completed translation [2023-02-14 10:14:48,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48 WrapperNode [2023-02-14 10:14:48,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 10:14:48,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 10:14:48,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 10:14:48,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 10:14:48,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,253 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-02-14 10:14:48,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 10:14:48,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 10:14:48,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 10:14:48,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 10:14:48,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,271 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 10:14:48,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 10:14:48,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 10:14:48,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 10:14:48,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (1/1) ... [2023-02-14 10:14:48,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:14:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:14:48,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 10:14:48,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 10:14:48,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 10:14:48,337 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 10:14:48,338 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 10:14:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 10:14:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 10:14:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 10:14:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 10:14:48,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 10:14:48,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 10:14:48,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 10:14:48,404 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 10:14:48,406 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 10:14:48,540 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 10:14:48,545 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 10:14:48,546 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 10:14:48,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:14:48 BoogieIcfgContainer [2023-02-14 10:14:48,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 10:14:48,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 10:14:48,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 10:14:48,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 10:14:48,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:14:48" (1/3) ... [2023-02-14 10:14:48,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acecc59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:14:48, skipping insertion in model container [2023-02-14 10:14:48,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:14:48" (2/3) ... [2023-02-14 10:14:48,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acecc59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:14:48, skipping insertion in model container [2023-02-14 10:14:48,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:14:48" (3/3) ... [2023-02-14 10:14:48,555 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2023-02-14 10:14:48,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 10:14:48,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 10:14:48,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 10:14:48,617 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;@c62fe33, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 10:14:48,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 10:14:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:14:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 10:14:48,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:14:48,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:14:48,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:14:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:14:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash -800294020, now seen corresponding path program 1 times [2023-02-14 10:14:48,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:14:48,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373972389] [2023-02-14 10:14:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:14:48,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:14:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:14:48,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:14:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:14:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:14:48,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:14:48,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373972389] [2023-02-14 10:14:48,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373972389] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:14:48,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:14:48,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 10:14:48,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619484063] [2023-02-14 10:14:48,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:14:48,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 10:14:48,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:14:48,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 10:14:48,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:14:48,852 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 10:14:48,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:14:48,873 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2023-02-14 10:14:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 10:14:48,875 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-14 10:14:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:14:48,881 INFO L225 Difference]: With dead ends: 47 [2023-02-14 10:14:48,881 INFO L226 Difference]: Without dead ends: 21 [2023-02-14 10:14:48,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:14:48,888 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 [2023-02-14 10:14:48,889 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] [2023-02-14 10:14:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-14 10:14:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-14 10:14:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:14:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-02-14 10:14:48,922 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2023-02-14 10:14:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:14:48,923 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-02-14 10:14:48,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 10:14:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-02-14 10:14:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 10:14:48,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:14:48,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:14:48,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 10:14:48,928 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:14:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:14:48,928 INFO L85 PathProgramCache]: Analyzing trace with hash -952637313, now seen corresponding path program 1 times [2023-02-14 10:14:48,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:14:48,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382206451] [2023-02-14 10:14:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:14:48,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:14:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:14:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:14:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:14:49,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 10:14:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:14:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:14:49,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:14:49,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382206451] [2023-02-14 10:14:49,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382206451] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:14:49,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:14:49,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:14:49,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470690146] [2023-02-14 10:14:49,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:14:49,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:14:49,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:14:49,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:14:49,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:14:49,259 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:14:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:14:49,282 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-02-14 10:14:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:14:49,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-14 10:14:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:14:49,283 INFO L225 Difference]: With dead ends: 26 [2023-02-14 10:14:49,283 INFO L226 Difference]: Without dead ends: 22 [2023-02-14 10:14:49,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:14:49,285 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:14:49,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:14:49,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-14 10:14:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-14 10:14:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:14:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-02-14 10:14:49,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 22 [2023-02-14 10:14:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:14:49,291 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-02-14 10:14:49,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:14:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-02-14 10:14:49,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 10:14:49,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:14:49,293 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:14:49,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 10:14:49,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:14:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:14:49,297 INFO L85 PathProgramCache]: Analyzing trace with hash -603190335, now seen corresponding path program 1 times [2023-02-14 10:14:49,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:14:49,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70737242] [2023-02-14 10:14:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:14:49,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:14:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:14:49,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:14:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:14:49,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 10:14:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:14:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:14:49,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:14:49,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70737242] [2023-02-14 10:14:49,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70737242] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:14:49,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:14:49,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 10:14:49,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862658304] [2023-02-14 10:14:49,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:14:49,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 10:14:49,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:14:49,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 10:14:49,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:14:49,457 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:14:49,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:14:49,506 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-02-14 10:14:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 10:14:49,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-02-14 10:14:49,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:14:49,508 INFO L225 Difference]: With dead ends: 41 [2023-02-14 10:14:49,508 INFO L226 Difference]: Without dead ends: 25 [2023-02-14 10:14:49,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:14:49,510 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:14:49,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:14:49,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-14 10:14:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-02-14 10:14:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:14:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-14 10:14:49,515 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 24 [2023-02-14 10:14:49,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:14:49,515 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-14 10:14:49,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:14:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-14 10:14:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 10:14:49,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:14:49,517 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:14:49,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 10:14:49,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:14:49,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:14:49,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1366149955, now seen corresponding path program 1 times [2023-02-14 10:14:49,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:14:49,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581806495] [2023-02-14 10:14:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:14:49,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:14:49,543 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:14:49,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592518745] [2023-02-14 10:14:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:14:49,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:14:49,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:14:49,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:14:49,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 10:14:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:14:49,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 10:14:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:14:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 10:14:49,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:14:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 10:14:49,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:14:49,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581806495] [2023-02-14 10:14:49,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:14:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592518745] [2023-02-14 10:14:49,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592518745] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:14:49,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:14:49,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-14 10:14:49,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592250153] [2023-02-14 10:14:49,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:14:49,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 10:14:49,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:14:49,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 10:14:49,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-14 10:14:49,923 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 10:14:50,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:14:50,101 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2023-02-14 10:14:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 10:14:50,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-02-14 10:14:50,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:14:50,104 INFO L225 Difference]: With dead ends: 71 [2023-02-14 10:14:50,104 INFO L226 Difference]: Without dead ends: 43 [2023-02-14 10:14:50,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-02-14 10:14:50,106 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:14:50,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 76 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:14:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-14 10:14:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2023-02-14 10:14:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:14:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-14 10:14:50,112 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 26 [2023-02-14 10:14:50,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:14:50,112 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-14 10:14:50,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 10:14:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-14 10:14:50,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 10:14:50,113 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:14:50,113 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:14:50,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 10:14:50,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:14:50,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:14:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:14:50,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1559224519, now seen corresponding path program 2 times [2023-02-14 10:14:50,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:14:50,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187386777] [2023-02-14 10:14:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:14:50,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:14:50,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:14:50,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920368412] [2023-02-14 10:14:50,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:14:50,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:14:50,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:14:50,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:14:50,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 10:14:50,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:14:50,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:14:50,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 10:14:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:14:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:14:50,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:14:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:14:50,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:14:50,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187386777] [2023-02-14 10:14:50,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:14:50,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920368412] [2023-02-14 10:14:50,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920368412] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:14:50,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:14:50,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-02-14 10:14:50,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606956929] [2023-02-14 10:14:50,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:14:50,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 10:14:50,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:14:50,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 10:14:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-14 10:14:50,600 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 10:14:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:14:50,738 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-02-14 10:14:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 10:14:50,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-02-14 10:14:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:14:50,740 INFO L225 Difference]: With dead ends: 39 [2023-02-14 10:14:50,740 INFO L226 Difference]: Without dead ends: 35 [2023-02-14 10:14:50,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2023-02-14 10:14:50,742 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:14:50,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 105 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:14:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-14 10:14:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-14 10:14:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:14:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-02-14 10:14:50,755 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2023-02-14 10:14:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:14:50,756 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-02-14 10:14:50,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 10:14:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-02-14 10:14:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-14 10:14:50,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:14:50,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:14:50,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 10:14:50,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:14:50,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:14:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:14:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1722352949, now seen corresponding path program 3 times [2023-02-14 10:14:50,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:14:50,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075464345] [2023-02-14 10:14:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:14:50,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:14:50,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:14:50,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485121976] [2023-02-14 10:14:50,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:14:50,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:14:50,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:14:50,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:14:50,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 10:14:51,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 10:14:51,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:14:51,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-14 10:14:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:14:51,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 10:14:51,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:51,205 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2023-02-14 10:14:51,213 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 0 case distinctions, treesize of input 33 treesize of output 33 [2023-02-14 10:14:51,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2023-02-14 10:14:51,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2023-02-14 10:14:51,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:51,312 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2023-02-14 10:14:51,319 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 0 case distinctions, treesize of input 34 treesize of output 32 [2023-02-14 10:14:51,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:51,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2023-02-14 10:14:51,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:51,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 [2023-02-14 10:14:51,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:51,420 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 50 [2023-02-14 10:14:51,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:51,452 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2023-02-14 10:14:51,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 25 treesize of output 34 [2023-02-14 10:14:51,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:51,480 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2023-02-14 10:14:51,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 60 [2023-02-14 10:14:52,115 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2023-02-14 10:14:52,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 334 treesize of output 217 [2023-02-14 10:14:52,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2023-02-14 10:14:52,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2023-02-14 10:14:52,174 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2023-02-14 10:14:52,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 176 treesize of output 219 [2023-02-14 10:14:52,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,223 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-14 10:14:52,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 160 [2023-02-14 10:14:52,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:52,291 INFO L321 Elim1Store]: treesize reduction 54, result has 21.7 percent of original size [2023-02-14 10:14:52,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 82 [2023-02-14 10:14:52,407 INFO L321 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2023-02-14 10:14:52,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 206 treesize of output 178 [2023-02-14 10:14:52,434 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 10:14:52,435 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 197 treesize of output 176 [2023-02-14 10:14:52,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 224 [2023-02-14 10:14:52,468 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 17 treesize of output 11 [2023-02-14 10:14:53,886 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 10:14:53,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 181 [2023-02-14 10:14:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:53,893 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:14:53,893 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:14:53,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:54,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:14:54,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 206 treesize of output 440 [2023-02-14 10:14:54,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:54,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:54,088 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:14:54,091 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:14:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:14:54,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:14:54,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 296 treesize of output 478 [2023-02-14 10:15:55,389 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:15:55,711 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:15:56,810 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:15:57,657 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:15:58,025 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:15:58,476 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:15:58,694 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:15:59,333 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:15:59,751 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:16:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:05,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:05,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:05,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075464345] [2023-02-14 10:16:05,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:05,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485121976] [2023-02-14 10:16:05,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485121976] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:16:05,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:16:05,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-14 10:16:05,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454533886] [2023-02-14 10:16:05,863 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:05,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 10:16:05,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:05,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 10:16:05,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 10:16:05,865 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:16:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:07,141 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-02-14 10:16:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 10:16:07,141 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-02-14 10:16:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:07,142 INFO L225 Difference]: With dead ends: 58 [2023-02-14 10:16:07,142 INFO L226 Difference]: Without dead ends: 54 [2023-02-14 10:16:07,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 10:16:07,144 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:07,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 232 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 10:16:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-14 10:16:07,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2023-02-14 10:16:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 10:16:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2023-02-14 10:16:07,153 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 34 [2023-02-14 10:16:07,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:07,154 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2023-02-14 10:16:07,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:16:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2023-02-14 10:16:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 10:16:07,155 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:07,155 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:07,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 10:16:07,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:07,357 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:07,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1565541619, now seen corresponding path program 4 times [2023-02-14 10:16:07,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:07,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115510172] [2023-02-14 10:16:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:07,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:07,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:07,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328045241] [2023-02-14 10:16:07,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 10:16:07,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:07,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:07,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:16:07,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 10:16:07,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 10:16:07,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:07,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 10:16:07,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:07,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:16:07,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:07,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115510172] [2023-02-14 10:16:07,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:07,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328045241] [2023-02-14 10:16:07,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328045241] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:16:07,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:16:07,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-14 10:16:07,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206391368] [2023-02-14 10:16:07,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:07,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 10:16:07,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:07,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 10:16:07,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-14 10:16:07,652 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:07,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:07,802 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2023-02-14 10:16:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 10:16:07,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-02-14 10:16:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:07,814 INFO L225 Difference]: With dead ends: 103 [2023-02-14 10:16:07,814 INFO L226 Difference]: Without dead ends: 89 [2023-02-14 10:16:07,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2023-02-14 10:16:07,815 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:07,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 118 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:16:07,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-14 10:16:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2023-02-14 10:16:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 states have internal predecessors, (67), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 10:16:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2023-02-14 10:16:07,840 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 36 [2023-02-14 10:16:07,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:07,840 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2023-02-14 10:16:07,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2023-02-14 10:16:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 10:16:07,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:07,849 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:07,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 10:16:08,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:08,055 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:08,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:08,055 INFO L85 PathProgramCache]: Analyzing trace with hash -285980785, now seen corresponding path program 5 times [2023-02-14 10:16:08,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:08,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684815771] [2023-02-14 10:16:08,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:08,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:08,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:08,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934624153] [2023-02-14 10:16:08,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 10:16:08,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:08,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:08,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:16:08,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 10:16:08,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-14 10:16:08,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:08,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-14 10:16:08,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:08,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 10:16:08,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,310 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2023-02-14 10:16:08,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2023-02-14 10:16:08,319 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 32 treesize of output 31 [2023-02-14 10:16:08,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,413 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 46 [2023-02-14 10:16:08,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2023-02-14 10:16:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 51 [2023-02-14 10:16:08,548 INFO L321 Elim1Store]: treesize reduction 33, result has 13.2 percent of original size [2023-02-14 10:16:08,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 102 [2023-02-14 10:16:08,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 45 [2023-02-14 10:16:08,569 INFO L321 Elim1Store]: treesize reduction 51, result has 8.9 percent of original size [2023-02-14 10:16:08,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 81 [2023-02-14 10:16:08,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,582 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 34 treesize of output 43 [2023-02-14 10:16:08,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,594 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 38 treesize of output 47 [2023-02-14 10:16:08,658 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 22 treesize of output 11 [2023-02-14 10:16:08,661 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 11 treesize of output 5 [2023-02-14 10:16:08,792 INFO L321 Elim1Store]: treesize reduction 41, result has 10.9 percent of original size [2023-02-14 10:16:08,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 199 treesize of output 145 [2023-02-14 10:16:08,808 INFO L321 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2023-02-14 10:16:08,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 150 [2023-02-14 10:16:08,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,817 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 123 treesize of output 101 [2023-02-14 10:16:08,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:08,832 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 32 treesize of output 46 [2023-02-14 10:16:08,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2023-02-14 10:16:08,847 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 22 treesize of output 11 [2023-02-14 10:16:08,851 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 11 treesize of output 5 [2023-02-14 10:16:09,411 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2023-02-14 10:16:09,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 361 treesize of output 238 [2023-02-14 10:16:09,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2023-02-14 10:16:09,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2023-02-14 10:16:09,470 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2023-02-14 10:16:09,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 196 treesize of output 235 [2023-02-14 10:16:09,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,555 INFO L321 Elim1Store]: treesize reduction 159, result has 14.1 percent of original size [2023-02-14 10:16:09,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 191 [2023-02-14 10:16:09,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:09,623 INFO L321 Elim1Store]: treesize reduction 81, result has 24.3 percent of original size [2023-02-14 10:16:09,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 91 [2023-02-14 10:16:09,734 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 116 treesize of output 93 [2023-02-14 10:16:09,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2023-02-14 10:16:09,751 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 74 treesize of output 56 [2023-02-14 10:16:10,762 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 10:16:10,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 153 [2023-02-14 10:16:10,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:16:10,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 case distinctions, treesize of input 153 treesize of output 239 [2023-02-14 10:16:10,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:16:10,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 170 treesize of output 248 [2023-02-14 10:16:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:11,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:12,225 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_380 (Array Int Int)) (v_ArrVal_382 (Array Int Int))) (= 0 (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))))) is different from false [2023-02-14 10:16:13,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:13,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684815771] [2023-02-14 10:16:13,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:13,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934624153] [2023-02-14 10:16:13,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934624153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:16:13,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:16:13,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-14 10:16:13,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593091943] [2023-02-14 10:16:13,082 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:13,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 10:16:13,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:13,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 10:16:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1118, Unknown=2, NotChecked=68, Total=1332 [2023-02-14 10:16:13,084 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:16:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:14,672 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2023-02-14 10:16:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 10:16:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2023-02-14 10:16:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:14,674 INFO L225 Difference]: With dead ends: 100 [2023-02-14 10:16:14,674 INFO L226 Difference]: Without dead ends: 96 [2023-02-14 10:16:14,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=286, Invalid=2166, Unknown=2, NotChecked=96, Total=2550 [2023-02-14 10:16:14,675 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:14,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 287 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 10:16:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-14 10:16:14,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2023-02-14 10:16:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:16:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2023-02-14 10:16:14,694 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 38 [2023-02-14 10:16:14,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:14,694 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2023-02-14 10:16:14,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:16:14,695 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2023-02-14 10:16:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 10:16:14,695 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:14,695 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:14,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 10:16:14,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:14,899 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash 103605969, now seen corresponding path program 6 times [2023-02-14 10:16:14,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:14,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121764785] [2023-02-14 10:16:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:14,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:14,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:14,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799042160] [2023-02-14 10:16:14,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 10:16:14,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:14,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:14,916 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:16:14,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 10:16:15,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-14 10:16:15,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:15,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 10:16:15,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:15,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:16:15,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:15,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121764785] [2023-02-14 10:16:15,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:15,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799042160] [2023-02-14 10:16:15,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799042160] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:16:15,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:16:15,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-02-14 10:16:15,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668088478] [2023-02-14 10:16:15,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:15,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 10:16:15,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:15,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 10:16:15,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-14 10:16:15,259 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:15,500 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2023-02-14 10:16:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 10:16:15,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-02-14 10:16:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:15,501 INFO L225 Difference]: With dead ends: 143 [2023-02-14 10:16:15,501 INFO L226 Difference]: Without dead ends: 127 [2023-02-14 10:16:15,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2023-02-14 10:16:15,503 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 81 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:15,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 157 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:16:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-14 10:16:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2023-02-14 10:16:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 83 states have (on average 1.108433734939759) internal successors, (92), 83 states have internal predecessors, (92), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 10:16:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-02-14 10:16:15,529 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 40 [2023-02-14 10:16:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:15,529 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-02-14 10:16:15,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-02-14 10:16:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 10:16:15,530 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:15,531 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:15,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 10:16:15,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:15,738 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:15,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1011334033, now seen corresponding path program 7 times [2023-02-14 10:16:15,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:15,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404545750] [2023-02-14 10:16:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:15,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:15,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388148122] [2023-02-14 10:16:15,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 10:16:15,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:15,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:15,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:16:15,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 10:16:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:16:15,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 10:16:15,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:15,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:16:16,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:16,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404545750] [2023-02-14 10:16:16,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:16,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388148122] [2023-02-14 10:16:16,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388148122] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:16:16,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:16:16,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-02-14 10:16:16,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369862601] [2023-02-14 10:16:16,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:16,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 10:16:16,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:16,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 10:16:16,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-14 10:16:16,057 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:16,276 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2023-02-14 10:16:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 10:16:16,277 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-02-14 10:16:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:16,278 INFO L225 Difference]: With dead ends: 122 [2023-02-14 10:16:16,278 INFO L226 Difference]: Without dead ends: 118 [2023-02-14 10:16:16,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2023-02-14 10:16:16,279 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:16,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 155 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:16:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-14 10:16:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 91. [2023-02-14 10:16:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 78 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:16:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2023-02-14 10:16:16,305 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 40 [2023-02-14 10:16:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:16,305 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2023-02-14 10:16:16,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2023-02-14 10:16:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 10:16:16,306 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:16,307 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:16,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 10:16:16,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:16,513 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:16,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:16,514 INFO L85 PathProgramCache]: Analyzing trace with hash -943992564, now seen corresponding path program 1 times [2023-02-14 10:16:16,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:16,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287885557] [2023-02-14 10:16:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:16,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:16,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:16,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749579021] [2023-02-14 10:16:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:16,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:16,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:16,528 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:16:16,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 10:16:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:16:16,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-14 10:16:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:16,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 10:16:16,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:16,713 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2023-02-14 10:16:16,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2023-02-14 10:16:16,720 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 32 treesize of output 31 [2023-02-14 10:16:16,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 67 [2023-02-14 10:16:16,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:16,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:16,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:16,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 65 treesize of output 57 [2023-02-14 10:16:17,344 INFO L321 Elim1Store]: treesize reduction 30, result has 14.3 percent of original size [2023-02-14 10:16:17,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 87 [2023-02-14 10:16:17,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2023-02-14 10:16:17,376 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2023-02-14 10:16:17,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 77 [2023-02-14 10:16:17,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,388 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 35 treesize of output 44 [2023-02-14 10:16:17,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,397 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:17,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-02-14 10:16:17,410 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 17 treesize of output 11 [2023-02-14 10:16:17,723 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2023-02-14 10:16:17,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 321 treesize of output 206 [2023-02-14 10:16:17,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2023-02-14 10:16:17,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2023-02-14 10:16:17,772 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2023-02-14 10:16:17,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 217 [2023-02-14 10:16:17,782 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:17,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,784 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:17,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 44 [2023-02-14 10:16:17,803 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:17,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,807 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:17,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2023-02-14 10:16:17,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2023-02-14 10:16:17,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 63 [2023-02-14 10:16:17,852 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 63 treesize of output 39 [2023-02-14 10:16:18,275 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 10:16:18,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 136 [2023-02-14 10:16:18,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:18,285 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:18,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 71 [2023-02-14 10:16:18,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:18,291 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:18,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 58 [2023-02-14 10:16:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:18,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:18,612 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_649 (Array Int Int)) (v_ArrVal_651 (Array Int Int))) (= 0 (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_649) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_651) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)))))))) is different from false [2023-02-14 10:16:18,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:18,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287885557] [2023-02-14 10:16:18,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:18,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749579021] [2023-02-14 10:16:18,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749579021] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:16:18,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:16:18,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-02-14 10:16:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302800553] [2023-02-14 10:16:18,751 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:18,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 10:16:18,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:18,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 10:16:18,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1113, Unknown=2, NotChecked=68, Total=1332 [2023-02-14 10:16:18,753 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 10:16:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:19,873 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2023-02-14 10:16:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 10:16:19,874 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2023-02-14 10:16:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:19,874 INFO L225 Difference]: With dead ends: 97 [2023-02-14 10:16:19,874 INFO L226 Difference]: Without dead ends: 69 [2023-02-14 10:16:19,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=328, Invalid=2224, Unknown=2, NotChecked=98, Total=2652 [2023-02-14 10:16:19,876 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:19,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 229 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 10:16:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-14 10:16:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-14 10:16:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.1) internal successors, (66), 60 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 10:16:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2023-02-14 10:16:19,896 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 42 [2023-02-14 10:16:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:19,896 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2023-02-14 10:16:19,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 10:16:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2023-02-14 10:16:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 10:16:19,898 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:19,898 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:19,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 10:16:20,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 10:16:20,105 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:20,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1282630227, now seen corresponding path program 8 times [2023-02-14 10:16:20,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:20,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711894305] [2023-02-14 10:16:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:20,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:20,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:20,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114479648] [2023-02-14 10:16:20,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:16:20,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:20,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:20,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:16:20,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 10:16:20,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:16:20,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:20,384 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 125 conjunts are in the unsatisfiable core [2023-02-14 10:16:20,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:20,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 10:16:20,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,436 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2023-02-14 10:16:20,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2023-02-14 10:16:20,442 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 32 treesize of output 31 [2023-02-14 10:16:20,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,517 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 83 treesize of output 69 [2023-02-14 10:16:20,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,622 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:20,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,629 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:20,639 INFO L321 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2023-02-14 10:16:20,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 82 treesize of output 74 [2023-02-14 10:16:20,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,762 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:20,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,764 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:20,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,765 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:20,773 INFO L321 Elim1Store]: treesize reduction 47, result has 23.0 percent of original size [2023-02-14 10:16:20,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 106 treesize of output 104 [2023-02-14 10:16:20,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,922 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:20,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,925 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:20,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,926 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:20,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,929 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:20,940 INFO L321 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2023-02-14 10:16:20,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 124 treesize of output 131 [2023-02-14 10:16:21,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,650 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:21,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,654 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:21,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,661 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:21,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,665 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:21,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:21,671 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:21,672 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:21,674 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:21,872 INFO L321 Elim1Store]: treesize reduction 800, result has 12.5 percent of original size [2023-02-14 10:16:21,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 19 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 98 case distinctions, treesize of input 194 treesize of output 245 [2023-02-14 10:16:24,281 INFO L321 Elim1Store]: treesize reduction 484, result has 39.0 percent of original size [2023-02-14 10:16:24,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 10 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 280 treesize of output 424 [2023-02-14 10:16:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:27,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:28,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711894305] [2023-02-14 10:16:28,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114479648] [2023-02-14 10:16:28,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114479648] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:16:28,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:16:28,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-02-14 10:16:28,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048664782] [2023-02-14 10:16:28,402 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:28,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 10:16:28,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:28,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 10:16:28,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 10:16:28,404 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:16:30,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:30,963 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2023-02-14 10:16:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 10:16:30,964 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2023-02-14 10:16:30,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:30,964 INFO L225 Difference]: With dead ends: 98 [2023-02-14 10:16:30,964 INFO L226 Difference]: Without dead ends: 94 [2023-02-14 10:16:30,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=336, Invalid=2856, Unknown=0, NotChecked=0, Total=3192 [2023-02-14 10:16:30,966 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:30,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 222 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-14 10:16:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-14 10:16:30,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2023-02-14 10:16:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 10:16:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2023-02-14 10:16:30,991 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 42 [2023-02-14 10:16:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:30,992 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2023-02-14 10:16:30,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:16:30,992 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2023-02-14 10:16:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 10:16:30,992 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:30,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:30,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 10:16:31,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:31,193 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1773046770, now seen corresponding path program 2 times [2023-02-14 10:16:31,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:31,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729258989] [2023-02-14 10:16:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:31,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:31,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:31,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977716640] [2023-02-14 10:16:31,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:16:31,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:31,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:31,208 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:16:31,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 10:16:31,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:16:31,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:31,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 10:16:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 10:16:31,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 10:16:31,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:31,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729258989] [2023-02-14 10:16:31,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:31,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977716640] [2023-02-14 10:16:31,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977716640] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:16:31,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:16:31,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-14 10:16:31,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883220907] [2023-02-14 10:16:31,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:31,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 10:16:31,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 10:16:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-14 10:16:31,448 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:31,622 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2023-02-14 10:16:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 10:16:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2023-02-14 10:16:31,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:31,623 INFO L225 Difference]: With dead ends: 94 [2023-02-14 10:16:31,623 INFO L226 Difference]: Without dead ends: 90 [2023-02-14 10:16:31,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-02-14 10:16:31,624 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:31,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 120 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:16:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-14 10:16:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2023-02-14 10:16:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 10:16:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2023-02-14 10:16:31,653 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 44 [2023-02-14 10:16:31,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:31,653 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2023-02-14 10:16:31,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2023-02-14 10:16:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 10:16:31,654 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:31,654 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:31,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 10:16:31,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 10:16:31,861 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:31,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:31,861 INFO L85 PathProgramCache]: Analyzing trace with hash 5267605, now seen corresponding path program 9 times [2023-02-14 10:16:31,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:31,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536372043] [2023-02-14 10:16:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:31,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:31,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:31,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148479202] [2023-02-14 10:16:31,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:16:31,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:31,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:31,877 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:16:31,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 10:16:32,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-14 10:16:32,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:32,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 10:16:32,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:32,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:16:32,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536372043] [2023-02-14 10:16:32,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148479202] [2023-02-14 10:16:32,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148479202] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:16:32,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:16:32,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-02-14 10:16:32,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924702567] [2023-02-14 10:16:32,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:32,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 10:16:32,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:32,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 10:16:32,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-02-14 10:16:32,287 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:32,537 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2023-02-14 10:16:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 10:16:32,538 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2023-02-14 10:16:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:32,539 INFO L225 Difference]: With dead ends: 133 [2023-02-14 10:16:32,539 INFO L226 Difference]: Without dead ends: 115 [2023-02-14 10:16:32,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 10:16:32,540 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 124 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:32,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 143 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:16:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-14 10:16:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2023-02-14 10:16:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 77 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:16:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2023-02-14 10:16:32,575 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 44 [2023-02-14 10:16:32,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:32,575 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2023-02-14 10:16:32,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:32,575 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2023-02-14 10:16:32,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 10:16:32,576 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:32,576 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:32,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 10:16:32,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 10:16:32,783 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:32,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash 453576021, now seen corresponding path program 10 times [2023-02-14 10:16:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:32,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44945146] [2023-02-14 10:16:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:32,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:32,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:32,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993377646] [2023-02-14 10:16:32,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 10:16:32,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:32,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:32,793 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:16:32,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 10:16:32,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 10:16:32,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:32,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 10:16:32,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:33,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:16:33,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:33,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44945146] [2023-02-14 10:16:33,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:33,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993377646] [2023-02-14 10:16:33,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993377646] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:16:33,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:16:33,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-02-14 10:16:33,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78222040] [2023-02-14 10:16:33,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:33,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 10:16:33,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:33,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 10:16:33,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-02-14 10:16:33,155 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:33,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:33,382 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2023-02-14 10:16:33,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 10:16:33,383 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2023-02-14 10:16:33,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:33,383 INFO L225 Difference]: With dead ends: 114 [2023-02-14 10:16:33,383 INFO L226 Difference]: Without dead ends: 110 [2023-02-14 10:16:33,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 10:16:33,384 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 59 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:33,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 165 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:16:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-14 10:16:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 92. [2023-02-14 10:16:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 79 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:16:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2023-02-14 10:16:33,413 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 44 [2023-02-14 10:16:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:33,414 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2023-02-14 10:16:33,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:16:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2023-02-14 10:16:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 10:16:33,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:33,415 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:33,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 10:16:33,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 10:16:33,617 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:33,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1257303952, now seen corresponding path program 3 times [2023-02-14 10:16:33,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:33,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386395670] [2023-02-14 10:16:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:33,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:33,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:33,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32214149] [2023-02-14 10:16:33,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:16:33,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:33,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:33,632 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:16:33,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 10:16:34,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-14 10:16:34,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:34,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 126 conjunts are in the unsatisfiable core [2023-02-14 10:16:34,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:34,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 10:16:34,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:34,039 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2023-02-14 10:16:34,043 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 0 case distinctions, treesize of input 33 treesize of output 33 [2023-02-14 10:16:34,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2023-02-14 10:16:34,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2023-02-14 10:16:34,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:34,112 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 83 treesize of output 69 [2023-02-14 10:16:34,211 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:34,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:34,213 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:34,281 INFO L321 Elim1Store]: treesize reduction 312, result has 13.1 percent of original size [2023-02-14 10:16:34,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 82 treesize of output 74 [2023-02-14 10:16:34,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:34,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:34,391 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:34,393 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:34,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:34,394 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:34,462 INFO L321 Elim1Store]: treesize reduction 432, result has 9.8 percent of original size [2023-02-14 10:16:34,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 197 treesize of output 117 [2023-02-14 10:16:35,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,139 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:35,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,142 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:35,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,148 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:35,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,152 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:35,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,156 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:35,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,158 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:35,290 INFO L321 Elim1Store]: treesize reduction 694, result has 9.8 percent of original size [2023-02-14 10:16:35,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 14 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 71 case distinctions, treesize of input 190 treesize of output 208 [2023-02-14 10:16:36,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,966 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:36,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,970 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:36,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,974 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,977 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,980 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:38,899 INFO L321 Elim1Store]: treesize reduction 2848, result has 10.7 percent of original size [2023-02-14 10:16:38,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 9 disjoint index pairs (out of 171 index pairs), introduced 22 new quantified variables, introduced 185 case distinctions, treesize of input 424 treesize of output 544 [2023-02-14 10:16:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:17:02,509 WARN L233 SmtUtils]: Spent 17.15s on a formula simplification. DAG size of input: 1166 DAG size of output: 588 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-02-14 10:17:02,511 INFO L321 Elim1Store]: treesize reduction 3968, result has 35.9 percent of original size [2023-02-14 10:17:02,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 32 select indices, 32 select index equivalence classes, 3 disjoint index pairs (out of 496 index pairs), introduced 35 new quantified variables, introduced 496 case distinctions, treesize of input 586 treesize of output 2441