./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array8_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/array8_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 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 10:16:14,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 10:16:14,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 10:16:14,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 10:16:14,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 10:16:14,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 10:16:14,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 10:16:14,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 10:16:14,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 10:16:14,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 10:16:14,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 10:16:14,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 10:16:14,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 10:16:14,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 10:16:14,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 10:16:14,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 10:16:14,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 10:16:14,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 10:16:14,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 10:16:14,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 10:16:14,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 10:16:14,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 10:16:14,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 10:16:14,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 10:16:14,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 10:16:14,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 10:16:14,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 10:16:14,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 10:16:14,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 10:16:14,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 10:16:14,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 10:16:14,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 10:16:14,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 10:16:14,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 10:16:14,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 10:16:14,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 10:16:14,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 10:16:14,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 10:16:14,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 10:16:14,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 10:16:14,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 10:16:14,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 10:16:14,122 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 10:16:14,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 10:16:14,123 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 10:16:14,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 10:16:14,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 10:16:14,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 10:16:14,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 10:16:14,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 10:16:14,125 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 10:16:14,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 10:16:14,126 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 10:16:14,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 10:16:14,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 10:16:14,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 10:16:14,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 10:16:14,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 10:16:14,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 10:16:14,128 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 10:16:14,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 10:16:14,128 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 10:16:14,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 10:16:14,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 10:16:14,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 10:16:14,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 10:16:14,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:16:14,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 10:16:14,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 10:16:14,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 10:16:14,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 10:16:14,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 10:16:14,130 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 10:16:14,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 10:16:14,130 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 10:16:14,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 10:16:14,131 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 10:16:14,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 [2023-02-14 10:16:14,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 10:16:14,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 10:16:14,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 10:16:14,376 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 10:16:14,376 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 10:16:14,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array8_pattern.c [2023-02-14 10:16:15,522 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 10:16:15,679 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 10:16:15,680 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c [2023-02-14 10:16:15,685 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02c069171/61823caa84b949cabce9fbd45b3a6b51/FLAG7da761b55 [2023-02-14 10:16:15,696 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02c069171/61823caa84b949cabce9fbd45b3a6b51 [2023-02-14 10:16:15,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 10:16:15,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 10:16:15,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 10:16:15,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 10:16:15,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 10:16:15,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f45db68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15, skipping insertion in model container [2023-02-14 10:16:15,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 10:16:15,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 10:16:15,842 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/array8_pattern.c[1321,1334] [2023-02-14 10:16:15,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:16:15,875 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 10:16:15,884 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/array8_pattern.c[1321,1334] [2023-02-14 10:16:15,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:16:15,904 INFO L208 MainTranslator]: Completed translation [2023-02-14 10:16:15,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15 WrapperNode [2023-02-14 10:16:15,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 10:16:15,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 10:16:15,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 10:16:15,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 10:16:15,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,944 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-02-14 10:16:15,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 10:16:15,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 10:16:15,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 10:16:15,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 10:16:15,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,985 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 10:16:15,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 10:16:15,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 10:16:15,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 10:16:15,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (1/1) ... [2023-02-14 10:16:15,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:16:16,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:16,022 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 10:16:16,029 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 10:16:16,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 10:16:16,055 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 10:16:16,056 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 10:16:16,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 10:16:16,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 10:16:16,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 10:16:16,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 10:16:16,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 10:16:16,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 10:16:16,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 10:16:16,120 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 10:16:16,124 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 10:16:16,357 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 10:16:16,362 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 10:16:16,363 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 10:16:16,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:16:16 BoogieIcfgContainer [2023-02-14 10:16:16,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 10:16:16,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 10:16:16,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 10:16:16,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 10:16:16,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:16:15" (1/3) ... [2023-02-14 10:16:16,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701af3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:16:16, skipping insertion in model container [2023-02-14 10:16:16,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:16:15" (2/3) ... [2023-02-14 10:16:16,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701af3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:16:16, skipping insertion in model container [2023-02-14 10:16:16,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:16:16" (3/3) ... [2023-02-14 10:16:16,384 INFO L112 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2023-02-14 10:16:16,404 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 10:16:16,411 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 10:16:16,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 10:16:16,496 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;@26c0f638, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 10:16:16,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 10:16:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 10:16:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 10:16:16,507 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:16,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:16,509 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1127586545, now seen corresponding path program 1 times [2023-02-14 10:16:16,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:16,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124081218] [2023-02-14 10:16:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:16,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:16:16,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:16:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:16:16,703 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 10:16:16,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:16,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124081218] [2023-02-14 10:16:16,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124081218] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:16:16,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:16:16,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 10:16:16,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220678222] [2023-02-14 10:16:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:16:16,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 10:16:16,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:16,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 10:16:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:16:16,741 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 10:16:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:16,758 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2023-02-14 10:16:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 10:16:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-14 10:16:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:16,774 INFO L225 Difference]: With dead ends: 53 [2023-02-14 10:16:16,774 INFO L226 Difference]: Without dead ends: 24 [2023-02-14 10:16:16,776 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 10:16:16,779 INFO L413 NwaCegarLoop]: 32 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, 32 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 10:16:16,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:16:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-14 10:16:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-14 10:16:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 10:16:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-14 10:16:16,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2023-02-14 10:16:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:16,808 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-14 10:16:16,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 10:16:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-14 10:16:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 10:16:16,812 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:16,813 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] [2023-02-14 10:16:16,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 10:16:16,813 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:16,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:16,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1008571545, now seen corresponding path program 1 times [2023-02-14 10:16:16,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:16,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226454200] [2023-02-14 10:16:16,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:16,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:16,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:16,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118832495] [2023-02-14 10:16:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:16,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:16,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:16,849 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 10:16:16,850 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 10:16:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:16:16,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 10:16:16,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:17,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:16:17,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:17,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226454200] [2023-02-14 10:16:17,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:17,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118832495] [2023-02-14 10:16:17,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118832495] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:16:17,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:16:17,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 10:16:17,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176354872] [2023-02-14 10:16:17,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:16:17,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 10:16:17,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:17,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 10:16:17,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 10:16:17,006 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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 10:16:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:17,086 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-02-14 10:16:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 10:16:17,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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 25 [2023-02-14 10:16:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:17,087 INFO L225 Difference]: With dead ends: 50 [2023-02-14 10:16:17,088 INFO L226 Difference]: Without dead ends: 32 [2023-02-14 10:16:17,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-14 10:16:17,089 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:17,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 60 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:16:17,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-14 10:16:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-14 10:16:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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 10:16:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-02-14 10:16:17,096 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2023-02-14 10:16:17,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:17,097 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-02-14 10:16:17,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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 10:16:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-02-14 10:16:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 10:16:17,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:17,098 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, 1, 1, 1] [2023-02-14 10:16:17,125 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 10:16:17,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:17,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:17,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1890411897, now seen corresponding path program 1 times [2023-02-14 10:16:17,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:17,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767807961] [2023-02-14 10:16:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:17,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:17,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:17,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694394285] [2023-02-14 10:16:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:17,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:17,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:17,365 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 10:16:17,368 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 10:16:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:16:17,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-14 10:16:17,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:17,517 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 10:16:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:17,576 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 18 treesize of output 18 [2023-02-14 10:16:17,581 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 12 treesize of output 11 [2023-02-14 10:16:18,110 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 23 treesize of output 22 [2023-02-14 10:16:18,248 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:18,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-02-14 10:16:18,421 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:18,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 12 [2023-02-14 10:16:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:18,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:18,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:18,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767807961] [2023-02-14 10:16:18,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:18,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694394285] [2023-02-14 10:16:18,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694394285] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:16:18,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:16:18,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-14 10:16:18,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296084293] [2023-02-14 10:16:18,820 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:18,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 10:16:18,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:18,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 10:16:18,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-02-14 10:16:18,828 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 17 states have internal predecessors, (25), 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 10:16:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:19,429 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2023-02-14 10:16:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 10:16:19,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 17 states have internal predecessors, (25), 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 29 [2023-02-14 10:16:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:19,431 INFO L225 Difference]: With dead ends: 77 [2023-02-14 10:16:19,431 INFO L226 Difference]: Without dead ends: 57 [2023-02-14 10:16:19,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 10:16:19,433 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:19,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 181 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 10:16:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-14 10:16:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2023-02-14 10:16:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 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 10:16:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-02-14 10:16:19,443 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 29 [2023-02-14 10:16:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:19,444 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-02-14 10:16:19,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 17 states have internal predecessors, (25), 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 10:16:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-02-14 10:16:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 10:16:19,445 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:19,445 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:19,455 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 10:16:19,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-14 10:16:19,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:19,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:19,652 INFO L85 PathProgramCache]: Analyzing trace with hash -32099493, now seen corresponding path program 2 times [2023-02-14 10:16:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:19,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029266917] [2023-02-14 10:16:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:19,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:19,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:19,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085612421] [2023-02-14 10:16:19,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:16:19,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:19,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:19,676 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 10:16:19,704 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 10:16:19,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:16:19,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:19,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 10:16:19,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:19,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:16:19,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:19,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029266917] [2023-02-14 10:16:19,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:19,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085612421] [2023-02-14 10:16:19,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085612421] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:16:19,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:16:19,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-14 10:16:19,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564863598] [2023-02-14 10:16:19,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:19,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 10:16:19,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:19,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 10:16:19,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-14 10:16:19,872 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 10:16:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:19,954 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2023-02-14 10:16:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 10:16:19,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 31 [2023-02-14 10:16:19,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:19,961 INFO L225 Difference]: With dead ends: 61 [2023-02-14 10:16:19,961 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 10:16:19,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-14 10:16:19,965 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:19,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 87 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:16:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 10:16:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-02-14 10:16:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 10:16:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-14 10:16:19,978 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 31 [2023-02-14 10:16:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:19,979 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-14 10:16:19,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 10:16:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-14 10:16:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 10:16:19,980 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:19,981 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:19,986 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 10:16:20,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:20,187 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1857874167, now seen corresponding path program 3 times [2023-02-14 10:16:20,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:20,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465017281] [2023-02-14 10:16:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:20,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:20,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:20,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734012913] [2023-02-14 10:16:20,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:16:20,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:20,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:20,214 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 10:16:20,237 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 10:16:20,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 10:16:20,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:20,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 10:16:20,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:20,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:16:20,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465017281] [2023-02-14 10:16:20,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734012913] [2023-02-14 10:16:20,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734012913] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:16:20,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:16:20,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-14 10:16:20,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385446229] [2023-02-14 10:16:20,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:20,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 10:16:20,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:20,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 10:16:20,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-14 10:16:20,375 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 10:16:20,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:20,450 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-02-14 10:16:20,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 10:16:20,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 31 [2023-02-14 10:16:20,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:20,452 INFO L225 Difference]: With dead ends: 39 [2023-02-14 10:16:20,452 INFO L226 Difference]: Without dead ends: 35 [2023-02-14 10:16:20,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-14 10:16:20,453 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:20,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 81 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:16:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-14 10:16:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-02-14 10:16:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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 10:16:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-02-14 10:16:20,458 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 31 [2023-02-14 10:16:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:20,459 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-02-14 10:16:20,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 10:16:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-02-14 10:16:20,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 10:16:20,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:20,460 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:20,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 10:16:20,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:20,666 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:20,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1236086951, now seen corresponding path program 4 times [2023-02-14 10:16:20,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:20,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672301578] [2023-02-14 10:16:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:20,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:20,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:20,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159300043] [2023-02-14 10:16:20,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 10:16:20,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:20,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:20,690 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 10:16:20,696 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 10:16:20,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 10:16:20,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:20,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-14 10:16:20,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:20,783 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 10:16:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:20,810 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 18 treesize of output 18 [2023-02-14 10:16:20,814 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 12 treesize of output 11 [2023-02-14 10:16:20,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-02-14 10:16:21,404 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-02-14 10:16:21,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 63 [2023-02-14 10:16:21,731 INFO L321 Elim1Store]: treesize reduction 81, result has 45.6 percent of original size [2023-02-14 10:16:21,731 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 8 case distinctions, treesize of input 121 treesize of output 160 [2023-02-14 10:16:22,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:22,495 INFO L321 Elim1Store]: treesize reduction 196, result has 20.0 percent of original size [2023-02-14 10:16:22,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 2 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 146 treesize of output 126 [2023-02-14 10:16:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:22,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:23,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:23,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672301578] [2023-02-14 10:16:23,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:23,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159300043] [2023-02-14 10:16:23,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159300043] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:16:23,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:16:23,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-14 10:16:23,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36926976] [2023-02-14 10:16:23,698 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:23,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 10:16:23,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:23,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 10:16:23,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 10:16:23,700 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 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 10:16:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:24,759 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2023-02-14 10:16:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 10:16:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 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 33 [2023-02-14 10:16:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:24,762 INFO L225 Difference]: With dead ends: 74 [2023-02-14 10:16:24,762 INFO L226 Difference]: Without dead ends: 60 [2023-02-14 10:16:24,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 10:16:24,764 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:24,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 283 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 10:16:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-14 10:16:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2023-02-14 10:16:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 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 10:16:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-02-14 10:16:24,772 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 33 [2023-02-14 10:16:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:24,773 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-02-14 10:16:24,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 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 10:16:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-02-14 10:16:24,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 10:16:24,774 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:24,774 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:24,785 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 10:16:24,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:24,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:24,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:24,980 INFO L85 PathProgramCache]: Analyzing trace with hash -977921513, now seen corresponding path program 1 times [2023-02-14 10:16:24,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:24,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147007777] [2023-02-14 10:16:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:24,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:24,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:25,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934982090] [2023-02-14 10:16:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:25,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:25,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:25,014 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 10:16:25,039 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 10:16:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:16:25,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-14 10:16:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:25,112 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 10:16:25,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:25,139 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 27 treesize of output 31 [2023-02-14 10:16:25,144 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 28 treesize of output 28 [2023-02-14 10:16:25,148 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 12 treesize of output 11 [2023-02-14 10:16:25,153 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 12 treesize of output 11 [2023-02-14 10:16:25,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:25,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:25,237 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 48 treesize of output 39 [2023-02-14 10:16:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:25,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:25,563 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2023-02-14 10:16:25,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 68 [2023-02-14 10:16:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:25,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:25,743 INFO L321 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2023-02-14 10:16:25,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 94 [2023-02-14 10:16:26,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:16:26,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 117 treesize of output 93 [2023-02-14 10:16:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:26,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:33,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:33,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147007777] [2023-02-14 10:16:33,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:33,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934982090] [2023-02-14 10:16:33,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934982090] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:16:33,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:16:33,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-14 10:16:33,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874399513] [2023-02-14 10:16:33,148 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:33,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 10:16:33,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:33,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 10:16:33,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=628, Unknown=3, NotChecked=0, Total=756 [2023-02-14 10:16:33,150 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 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 10:16:34,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:34,143 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2023-02-14 10:16:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 10:16:34,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 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 33 [2023-02-14 10:16:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:34,145 INFO L225 Difference]: With dead ends: 71 [2023-02-14 10:16:34,145 INFO L226 Difference]: Without dead ends: 67 [2023-02-14 10:16:34,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=234, Invalid=1245, Unknown=3, NotChecked=0, Total=1482 [2023-02-14 10:16:34,147 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:34,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 149 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 10:16:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-14 10:16:34,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2023-02-14 10:16:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 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 10:16:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-02-14 10:16:34,158 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 33 [2023-02-14 10:16:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:34,159 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-02-14 10:16:34,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 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 10:16:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-02-14 10:16:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 10:16:34,160 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:34,160 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:34,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 10:16:34,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:34,368 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:34,369 INFO L85 PathProgramCache]: Analyzing trace with hash 868497529, now seen corresponding path program 2 times [2023-02-14 10:16:34,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:34,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011070227] [2023-02-14 10:16:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:34,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:34,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:34,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456482718] [2023-02-14 10:16:34,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:16:34,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:34,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:34,391 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 10:16:34,394 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 10:16:34,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:16:34,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 10:16:34,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:34,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:16:34,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:34,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011070227] [2023-02-14 10:16:34,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:34,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456482718] [2023-02-14 10:16:34,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456482718] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:16:34,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:16:34,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-14 10:16:34,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813436711] [2023-02-14 10:16:34,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:34,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 10:16:34,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:34,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 10:16:34,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-14 10:16:34,606 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 10:16:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:34,724 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2023-02-14 10:16:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 10:16:34,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 35 [2023-02-14 10:16:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:34,725 INFO L225 Difference]: With dead ends: 105 [2023-02-14 10:16:34,725 INFO L226 Difference]: Without dead ends: 93 [2023-02-14 10:16:34,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-14 10:16:34,726 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 75 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:34,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 117 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:16:34,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-14 10:16:34,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2023-02-14 10:16:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 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 10:16:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2023-02-14 10:16:34,740 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 35 [2023-02-14 10:16:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:34,741 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2023-02-14 10:16:34,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 10:16:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2023-02-14 10:16:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 10:16:34,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:34,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:16:34,750 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 10:16:34,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:34,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1373135831, now seen corresponding path program 5 times [2023-02-14 10:16:34,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:34,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782122682] [2023-02-14 10:16:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:34,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:34,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:34,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270831140] [2023-02-14 10:16:34,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 10:16:34,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:34,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:34,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:16:34,993 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 10:16:35,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-14 10:16:35,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:35,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 10:16:35,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:16:35,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:16:35,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:35,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782122682] [2023-02-14 10:16:35,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:35,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270831140] [2023-02-14 10:16:35,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270831140] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:16:35,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:16:35,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-14 10:16:35,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283463415] [2023-02-14 10:16:35,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:35,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 10:16:35,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 10:16:35,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-14 10:16:35,226 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 10:16:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:35,366 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2023-02-14 10:16:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 10:16:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 35 [2023-02-14 10:16:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:35,367 INFO L225 Difference]: With dead ends: 90 [2023-02-14 10:16:35,367 INFO L226 Difference]: Without dead ends: 86 [2023-02-14 10:16:35,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-02-14 10:16:35,368 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 57 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:35,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 122 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:16:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-14 10:16:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2023-02-14 10:16:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 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 10:16:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2023-02-14 10:16:35,380 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 35 [2023-02-14 10:16:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:35,381 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2023-02-14 10:16:35,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 10:16:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2023-02-14 10:16:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 10:16:35,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:35,382 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, 1, 1, 1] [2023-02-14 10:16:35,393 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 10:16:35,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-14 10:16:35,588 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:35,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1081807417, now seen corresponding path program 6 times [2023-02-14 10:16:35,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:35,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294287145] [2023-02-14 10:16:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:35,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:35,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:35,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978822649] [2023-02-14 10:16:35,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 10:16:35,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:35,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:35,610 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 10:16:35,613 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 10:16:35,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-14 10:16:35,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:35,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-14 10:16:35,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:35,724 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 10:16:35,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,745 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 27 treesize of output 31 [2023-02-14 10:16:35,751 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 12 treesize of output 11 [2023-02-14 10:16:35,754 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 27 treesize of output 26 [2023-02-14 10:16:35,822 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 64 treesize of output 53 [2023-02-14 10:16:35,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:35,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2023-02-14 10:16:36,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,448 INFO L321 Elim1Store]: treesize reduction 46, result has 48.9 percent of original size [2023-02-14 10:16:36,448 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 3 case distinctions, treesize of input 66 treesize of output 98 [2023-02-14 10:16:36,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:36,719 INFO L321 Elim1Store]: treesize reduction 76, result has 49.3 percent of original size [2023-02-14 10:16:36,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 163 [2023-02-14 10:16:37,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:37,739 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:37,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:37,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 67 [2023-02-14 10:16:37,883 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 10:16:37,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:16:38,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:16:38,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294287145] [2023-02-14 10:16:38,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:16:38,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978822649] [2023-02-14 10:16:38,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978822649] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:16:38,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:16:38,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-02-14 10:16:38,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019420408] [2023-02-14 10:16:38,715 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:16:38,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 10:16:38,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:16:38,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 10:16:38,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 10:16:38,717 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 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 10:16:41,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:16:41,249 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2023-02-14 10:16:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-14 10:16:41,249 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 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) Word has length 37 [2023-02-14 10:16:41,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:16:41,251 INFO L225 Difference]: With dead ends: 121 [2023-02-14 10:16:41,251 INFO L226 Difference]: Without dead ends: 117 [2023-02-14 10:16:41,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=515, Invalid=3025, Unknown=0, NotChecked=0, Total=3540 [2023-02-14 10:16:41,252 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 10:16:41,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 326 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 10:16:41,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-14 10:16:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2023-02-14 10:16:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 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 10:16:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2023-02-14 10:16:41,273 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 37 [2023-02-14 10:16:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:16:41,273 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2023-02-14 10:16:41,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 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 10:16:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2023-02-14 10:16:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 10:16:41,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:16:41,277 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, 1, 1, 1] [2023-02-14 10:16:41,285 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 10:16:41,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 10:16:41,485 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:16:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:16:41,486 INFO L85 PathProgramCache]: Analyzing trace with hash 70690167, now seen corresponding path program 3 times [2023-02-14 10:16:41,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:16:41,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857058067] [2023-02-14 10:16:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:16:41,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:16:41,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:16:41,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252411893] [2023-02-14 10:16:41,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:16:41,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:16:41,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:16:41,501 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 10:16:41,508 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 10:16:41,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 10:16:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:16:41,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-14 10:16:41,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:16:41,606 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 10:16:41,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:41,635 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 27 treesize of output 31 [2023-02-14 10:16:41,646 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 28 treesize of output 28 [2023-02-14 10:16:41,650 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 12 treesize of output 11 [2023-02-14 10:16:41,658 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 12 treesize of output 11 [2023-02-14 10:16:41,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:41,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:41,719 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 48 treesize of output 39 [2023-02-14 10:16:41,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:41,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:41,823 INFO L321 Elim1Store]: treesize reduction 66, result has 43.6 percent of original size [2023-02-14 10:16:41,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 85 [2023-02-14 10:16:42,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:42,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:42,617 INFO L321 Elim1Store]: treesize reduction 80, result has 42.0 percent of original size [2023-02-14 10:16:42,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 70 treesize of output 114 [2023-02-14 10:16:42,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:42,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:42,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:42,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:42,947 INFO L321 Elim1Store]: treesize reduction 114, result has 39.0 percent of original size [2023-02-14 10:16:42,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 130 treesize of output 188 [2023-02-14 10:16:49,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:49,731 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:16:49,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:16:49,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:16:49,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 4 disjoint index pairs (out of 91 index pairs), introduced 12 new quantified variables, introduced 30 case distinctions, treesize of input 260 treesize of output 500 [2023-02-14 10:17:05,223 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:08,556 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:10,177 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:14,346 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:14,897 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:15,640 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:15,965 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:17,526 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:19,060 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:19,373 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:20,797 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:22,435 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:22,904 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:24,250 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:24,740 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:25,919 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:26,668 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:27,049 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:29,791 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:30,189 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:33,103 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:33,469 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:34,051 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:17:34,425 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-14 10:18:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:18:25,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:29,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857058067] [2023-02-14 10:18:29,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:18:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252411893] [2023-02-14 10:18:29,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252411893] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:29,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:18:29,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-14 10:18:29,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385881357] [2023-02-14 10:18:29,176 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:29,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 10:18:29,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:29,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 10:18:29,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1358, Unknown=2, NotChecked=0, Total=1560 [2023-02-14 10:18:29,177 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 24 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 10:18:36,545 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 100 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:18:38,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:18:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:41,126 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2023-02-14 10:18:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 10:18:41,127 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 24 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) Word has length 37 [2023-02-14 10:18:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:41,127 INFO L225 Difference]: With dead ends: 100 [2023-02-14 10:18:41,127 INFO L226 Difference]: Without dead ends: 96 [2023-02-14 10:18:41,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=359, Invalid=2290, Unknown=3, NotChecked=0, Total=2652 [2023-02-14 10:18:41,129 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:41,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 337 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 547 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2023-02-14 10:18:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-14 10:18:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2023-02-14 10:18:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 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 10:18:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2023-02-14 10:18:41,149 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 37 [2023-02-14 10:18:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:41,149 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2023-02-14 10:18:41,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 24 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 10:18:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2023-02-14 10:18:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 10:18:41,150 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:41,150 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, 1, 1, 1] [2023-02-14 10:18:41,157 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 10:18:41,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 10:18:41,356 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:41,357 INFO L85 PathProgramCache]: Analyzing trace with hash 288075803, now seen corresponding path program 7 times [2023-02-14 10:18:41,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:41,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129198768] [2023-02-14 10:18:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:41,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:41,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:18:41,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460705877] [2023-02-14 10:18:41,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 10:18:41,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:41,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:41,390 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 10:18:41,392 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 10:18:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:18:41,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 10:18:41,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:41,553 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 10:18:41,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:41,643 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 10:18:41,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:41,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129198768] [2023-02-14 10:18:41,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:18:41,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460705877] [2023-02-14 10:18:41,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460705877] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:18:41,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:18:41,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-14 10:18:41,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252608388] [2023-02-14 10:18:41,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:41,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 10:18:41,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:41,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 10:18:41,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-14 10:18:41,646 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 10:18:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:41,913 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2023-02-14 10:18:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 10:18:41,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 39 [2023-02-14 10:18:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:41,914 INFO L225 Difference]: With dead ends: 144 [2023-02-14 10:18:41,915 INFO L226 Difference]: Without dead ends: 130 [2023-02-14 10:18:41,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-02-14 10:18:41,916 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 88 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:41,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 171 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:18:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-14 10:18:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2023-02-14 10:18:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 89 states have internal predecessors, (103), 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 10:18:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2023-02-14 10:18:41,944 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 39 [2023-02-14 10:18:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:41,944 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2023-02-14 10:18:41,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 10:18:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2023-02-14 10:18:41,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 10:18:41,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:41,946 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, 1, 1, 1] [2023-02-14 10:18:41,952 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 10:18:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 10:18:42,152 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1485008409, now seen corresponding path program 8 times [2023-02-14 10:18:42,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:42,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374115947] [2023-02-14 10:18:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:42,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:42,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:18:42,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867753532] [2023-02-14 10:18:42,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:18:42,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:42,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:42,172 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 10:18:42,174 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 10:18:42,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:18:42,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:18:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-14 10:18:42,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:42,281 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 10:18:42,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,304 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 27 treesize of output 31 [2023-02-14 10:18:42,307 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 28 treesize of output 28 [2023-02-14 10:18:42,311 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 12 treesize of output 11 [2023-02-14 10:18:42,316 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 12 treesize of output 11 [2023-02-14 10:18:42,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,412 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 54 treesize of output 43 [2023-02-14 10:18:42,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2023-02-14 10:18:42,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:42,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2023-02-14 10:18:43,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,222 INFO L321 Elim1Store]: treesize reduction 62, result has 48.8 percent of original size [2023-02-14 10:18:43,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 128 [2023-02-14 10:18:43,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:43,499 INFO L321 Elim1Store]: treesize reduction 166, result has 17.4 percent of original size [2023-02-14 10:18:43,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 127 treesize of output 142 [2023-02-14 10:18:44,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 72 [2023-02-14 10:18:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:18:44,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:45,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:45,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374115947] [2023-02-14 10:18:45,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:18:45,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867753532] [2023-02-14 10:18:45,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867753532] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:45,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:18:45,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-14 10:18:45,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208360704] [2023-02-14 10:18:45,935 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:45,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 10:18:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:45,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 10:18:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 10:18:45,937 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 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 10:18:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:18:47,347 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2023-02-14 10:18:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 10:18:47,347 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 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 41 [2023-02-14 10:18:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:18:47,348 INFO L225 Difference]: With dead ends: 125 [2023-02-14 10:18:47,348 INFO L226 Difference]: Without dead ends: 121 [2023-02-14 10:18:47,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 10:18:47,349 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 10:18:47,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 346 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 10:18:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-14 10:18:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2023-02-14 10:18:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 94 states have internal predecessors, (109), 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 10:18:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2023-02-14 10:18:47,378 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 41 [2023-02-14 10:18:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:18:47,378 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2023-02-14 10:18:47,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 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 10:18:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2023-02-14 10:18:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 10:18:47,379 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:18:47,379 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, 1, 1, 1] [2023-02-14 10:18:47,384 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 10:18:47,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 10:18:47,580 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:18:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:18:47,580 INFO L85 PathProgramCache]: Analyzing trace with hash 463940055, now seen corresponding path program 4 times [2023-02-14 10:18:47,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:18:47,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897527065] [2023-02-14 10:18:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:18:47,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:18:47,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:18:47,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791537520] [2023-02-14 10:18:47,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 10:18:47,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:18:47,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:18:47,598 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 10:18:47,601 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 10:18:47,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 10:18:47,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:18:47,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 89 conjunts are in the unsatisfiable core [2023-02-14 10:18:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:18:47,748 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 10:18:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:47,780 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 27 treesize of output 31 [2023-02-14 10:18:47,785 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 28 treesize of output 28 [2023-02-14 10:18:47,789 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 12 treesize of output 11 [2023-02-14 10:18:47,801 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 12 treesize of output 11 [2023-02-14 10:18:47,861 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 64 treesize of output 53 [2023-02-14 10:18:47,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:47,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:47,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:47,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:47,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:47,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:47,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2023-02-14 10:18:48,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2023-02-14 10:18:48,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,692 INFO L321 Elim1Store]: treesize reduction 62, result has 48.8 percent of original size [2023-02-14 10:18:48,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 128 [2023-02-14 10:18:48,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:48,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:49,003 INFO L321 Elim1Store]: treesize reduction 68, result has 36.4 percent of original size [2023-02-14 10:18:49,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 164 [2023-02-14 10:18:51,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:51,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:51,365 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:18:51,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:18:51,410 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:18:51,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 7 disjoint index pairs (out of 66 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 215 treesize of output 215 [2023-02-14 10:18:52,324 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 10:18:52,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:18:59,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:18:59,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897527065] [2023-02-14 10:18:59,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:18:59,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791537520] [2023-02-14 10:18:59,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791537520] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:18:59,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:18:59,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-02-14 10:18:59,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824870177] [2023-02-14 10:18:59,981 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:18:59,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 10:18:59,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:18:59,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 10:18:59,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1503, Unknown=2, NotChecked=0, Total=1722 [2023-02-14 10:18:59,982 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 states have internal predecessors, (37), 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 10:19:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:02,458 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2023-02-14 10:19:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 10:19:02,459 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 states have internal predecessors, (37), 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 41 [2023-02-14 10:19:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:02,460 INFO L225 Difference]: With dead ends: 127 [2023-02-14 10:19:02,460 INFO L226 Difference]: Without dead ends: 123 [2023-02-14 10:19:02,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=351, Invalid=2197, Unknown=2, NotChecked=0, Total=2550 [2023-02-14 10:19:02,461 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:02,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 363 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 10:19:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-14 10:19:02,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2023-02-14 10:19:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 91 states have internal predecessors, (105), 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 10:19:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2023-02-14 10:19:02,486 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 41 [2023-02-14 10:19:02,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:02,487 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2023-02-14 10:19:02,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 states have internal predecessors, (37), 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 10:19:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2023-02-14 10:19:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 10:19:02,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:02,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:19:02,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 10:19:02,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 10:19:02,690 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:02,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2111753712, now seen corresponding path program 1 times [2023-02-14 10:19:02,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:02,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31744904] [2023-02-14 10:19:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:02,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:02,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:19:02,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740079283] [2023-02-14 10:19:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:02,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:02,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:02,705 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:19:02,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 10:19:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:02,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-14 10:19:02,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:02,849 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 10:19:02,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:02,885 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 18 treesize of output 18 [2023-02-14 10:19:02,888 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 12 treesize of output 11 [2023-02-14 10:19:02,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:02,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2023-02-14 10:19:03,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:03,390 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-14 10:19:03,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 52 [2023-02-14 10:19:03,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:03,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:03,566 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2023-02-14 10:19:03,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:03,773 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-14 10:19:03,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 52 [2023-02-14 10:19:03,939 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:03,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:03,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2023-02-14 10:19:04,281 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:04,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:04,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 20 [2023-02-14 10:19:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 10:19:04,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:05,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31744904] [2023-02-14 10:19:05,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:19:05,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740079283] [2023-02-14 10:19:05,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740079283] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:05,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:19:05,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-14 10:19:05,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449666465] [2023-02-14 10:19:05,206 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:05,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 10:19:05,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:05,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 10:19:05,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 10:19:05,208 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 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 10:19:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:06,420 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2023-02-14 10:19:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 10:19:06,420 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 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) Word has length 43 [2023-02-14 10:19:06,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:06,421 INFO L225 Difference]: With dead ends: 130 [2023-02-14 10:19:06,421 INFO L226 Difference]: Without dead ends: 120 [2023-02-14 10:19:06,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2023-02-14 10:19:06,423 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:06,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 234 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 10:19:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-14 10:19:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2023-02-14 10:19:06,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 99 states have (on average 1.1515151515151516) internal successors, (114), 99 states have internal predecessors, (114), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:19:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2023-02-14 10:19:06,448 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 43 [2023-02-14 10:19:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:06,448 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2023-02-14 10:19:06,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 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 10:19:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2023-02-14 10:19:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 10:19:06,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:06,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:19:06,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 10:19:06,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:06,653 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1853588274, now seen corresponding path program 1 times [2023-02-14 10:19:06,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:06,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828493687] [2023-02-14 10:19:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:06,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:06,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:19:06,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351207102] [2023-02-14 10:19:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:06,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:06,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:06,666 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:19:06,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 10:19:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:06,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 91 conjunts are in the unsatisfiable core [2023-02-14 10:19:06,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:06,815 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 10:19:06,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:06,849 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 18 treesize of output 18 [2023-02-14 10:19:06,854 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 12 treesize of output 11 [2023-02-14 10:19:06,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-02-14 10:19:07,295 INFO L321 Elim1Store]: treesize reduction 20, result has 42.9 percent of original size [2023-02-14 10:19:07,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 43 [2023-02-14 10:19:07,495 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:07,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:07,526 INFO L321 Elim1Store]: treesize reduction 144, result has 14.3 percent of original size [2023-02-14 10:19:07,526 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 9 case distinctions, treesize of input 54 treesize of output 47 [2023-02-14 10:19:07,932 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:07,965 INFO L321 Elim1Store]: treesize reduction 127, result has 25.7 percent of original size [2023-02-14 10:19:07,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 70 [2023-02-14 10:19:08,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:08,184 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:08,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:08,187 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:08,195 INFO L321 Elim1Store]: treesize reduction 34, result has 29.2 percent of original size [2023-02-14 10:19:08,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 62 [2023-02-14 10:19:08,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:08,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:08,598 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:08,598 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:08,620 INFO L321 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2023-02-14 10:19:08,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 70 treesize of output 38 [2023-02-14 10:19:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:19:08,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:09,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828493687] [2023-02-14 10:19:09,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:19:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351207102] [2023-02-14 10:19:09,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351207102] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:09,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:19:09,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-14 10:19:09,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008234278] [2023-02-14 10:19:09,594 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:09,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 10:19:09,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 10:19:09,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 10:19:09,596 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 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 10:19:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:10,868 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2023-02-14 10:19:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 10:19:10,869 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 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 43 [2023-02-14 10:19:10,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:10,869 INFO L225 Difference]: With dead ends: 133 [2023-02-14 10:19:10,869 INFO L226 Difference]: Without dead ends: 123 [2023-02-14 10:19:10,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=340, Invalid=2416, Unknown=0, NotChecked=0, Total=2756 [2023-02-14 10:19:10,871 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:10,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 245 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 10:19:10,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-14 10:19:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 108. [2023-02-14 10:19:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 93 states have internal predecessors, (107), 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 10:19:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2023-02-14 10:19:10,896 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 43 [2023-02-14 10:19:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:10,897 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2023-02-14 10:19:10,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 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 10:19:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2023-02-14 10:19:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 10:19:10,898 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:10,898 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:19:10,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 10:19:11,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-14 10:19:11,099 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:11,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1892898994, now seen corresponding path program 2 times [2023-02-14 10:19:11,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:11,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033892255] [2023-02-14 10:19:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:11,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:11,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:19:11,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136072278] [2023-02-14 10:19:11,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:19:11,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:11,111 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:19:11,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 10:19:11,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:19:11,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:19:11,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-14 10:19:11,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:11,314 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 10:19:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:11,340 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 18 treesize of output 18 [2023-02-14 10:19:11,343 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 12 treesize of output 11 [2023-02-14 10:19:11,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-02-14 10:19:11,763 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-14 10:19:11,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 40 [2023-02-14 10:19:11,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:11,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2023-02-14 10:19:12,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:12,507 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2023-02-14 10:19:12,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 70 [2023-02-14 10:19:12,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:12,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:12,861 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:12,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:12,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 65 [2023-02-14 10:19:13,430 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:13,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:13,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:13,432 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:13,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 22 [2023-02-14 10:19:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:19:13,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:13,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:13,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033892255] [2023-02-14 10:19:13,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:19:13,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136072278] [2023-02-14 10:19:13,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136072278] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:13,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:19:13,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-14 10:19:13,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832268864] [2023-02-14 10:19:13,990 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:13,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 10:19:13,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:13,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 10:19:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 10:19:13,991 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 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 10:19:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:18,448 INFO L93 Difference]: Finished difference Result 160 states and 178 transitions. [2023-02-14 10:19:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-14 10:19:18,449 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 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 43 [2023-02-14 10:19:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:18,449 INFO L225 Difference]: With dead ends: 160 [2023-02-14 10:19:18,449 INFO L226 Difference]: Without dead ends: 140 [2023-02-14 10:19:18,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=475, Invalid=3064, Unknown=1, NotChecked=0, Total=3540 [2023-02-14 10:19:18,451 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 78 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:18,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 322 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 10:19:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-14 10:19:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2023-02-14 10:19:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 109 states have (on average 1.146788990825688) internal successors, (125), 109 states have internal predecessors, (125), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 10:19:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 143 transitions. [2023-02-14 10:19:18,491 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 143 transitions. Word has length 43 [2023-02-14 10:19:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:18,491 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 143 transitions. [2023-02-14 10:19:18,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 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 10:19:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 143 transitions. [2023-02-14 10:19:18,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 10:19:18,492 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:18,492 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:19:18,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 10:19:18,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 10:19:18,697 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:18,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:18,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1634733556, now seen corresponding path program 1 times [2023-02-14 10:19:18,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:18,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067311287] [2023-02-14 10:19:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:18,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:18,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:19:18,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992990686] [2023-02-14 10:19:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:18,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:18,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:18,711 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:19:18,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 10:19:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:19:18,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-14 10:19:18,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:18,824 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 10:19:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:18,862 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 27 treesize of output 31 [2023-02-14 10:19:18,866 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 28 treesize of output 28 [2023-02-14 10:19:18,869 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 12 treesize of output 11 [2023-02-14 10:19:18,875 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 12 treesize of output 11 [2023-02-14 10:19:18,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:18,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:18,945 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 54 treesize of output 43 [2023-02-14 10:19:19,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:19,390 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2023-02-14 10:19:19,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 56 [2023-02-14 10:19:19,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:19,609 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2023-02-14 10:19:19,609 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 65 treesize of output 79 [2023-02-14 10:19:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:20,265 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2023-02-14 10:19:20,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 90 [2023-02-14 10:19:20,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:20,549 INFO L321 Elim1Store]: treesize reduction 62, result has 10.1 percent of original size [2023-02-14 10:19:20,550 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 81 treesize of output 72 [2023-02-14 10:19:20,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 41 [2023-02-14 10:19:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:19:21,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:23,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:23,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067311287] [2023-02-14 10:19:23,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:19:23,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992990686] [2023-02-14 10:19:23,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992990686] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:23,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:19:23,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-14 10:19:23,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146917550] [2023-02-14 10:19:23,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:23,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 10:19:23,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:23,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 10:19:23,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 10:19:23,021 INFO L87 Difference]: Start difference. First operand 128 states and 143 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 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 10:19:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:24,666 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2023-02-14 10:19:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 10:19:24,667 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 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 43 [2023-02-14 10:19:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:24,668 INFO L225 Difference]: With dead ends: 153 [2023-02-14 10:19:24,668 INFO L226 Difference]: Without dead ends: 143 [2023-02-14 10:19:24,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=371, Invalid=2709, Unknown=0, NotChecked=0, Total=3080 [2023-02-14 10:19:24,670 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:24,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 308 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 10:19:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-14 10:19:24,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2023-02-14 10:19:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 10:19:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 153 transitions. [2023-02-14 10:19:24,706 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 153 transitions. Word has length 43 [2023-02-14 10:19:24,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:24,707 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 153 transitions. [2023-02-14 10:19:24,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 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 10:19:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 153 transitions. [2023-02-14 10:19:24,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 10:19:24,707 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:24,707 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, 1, 1, 1] [2023-02-14 10:19:24,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 10:19:24,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 10:19:24,908 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:24,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1217172475, now seen corresponding path program 9 times [2023-02-14 10:19:24,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:24,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910551377] [2023-02-14 10:19:24,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:24,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:24,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:19:24,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050148657] [2023-02-14 10:19:24,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:19:24,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:24,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:24,922 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:19:24,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 10:19:25,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-14 10:19:25,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:19:25,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 10:19:25,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:25,205 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 10:19:25,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:25,298 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 10:19:25,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:25,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910551377] [2023-02-14 10:19:25,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:19:25,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050148657] [2023-02-14 10:19:25,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050148657] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:19:25,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:19:25,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-02-14 10:19:25,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068236230] [2023-02-14 10:19:25,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:25,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 10:19:25,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:25,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 10:19:25,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-14 10:19:25,300 INFO L87 Difference]: Start difference. First operand 138 states and 153 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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 10:19:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:25,673 INFO L93 Difference]: Finished difference Result 223 states and 242 transitions. [2023-02-14 10:19:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 10:19:25,673 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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 43 [2023-02-14 10:19:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:25,674 INFO L225 Difference]: With dead ends: 223 [2023-02-14 10:19:25,674 INFO L226 Difference]: Without dead ends: 207 [2023-02-14 10:19:25,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 10:19:25,676 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 180 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:25,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 161 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 10:19:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-14 10:19:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 169. [2023-02-14 10:19:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 144 states have (on average 1.1458333333333333) internal successors, (165), 144 states have internal predecessors, (165), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 10:19:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2023-02-14 10:19:25,723 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 43 [2023-02-14 10:19:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:25,724 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2023-02-14 10:19:25,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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 10:19:25,724 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2023-02-14 10:19:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 10:19:25,725 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:25,725 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, 1, 1, 1] [2023-02-14 10:19:25,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 10:19:25,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:25,931 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:25,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2118573319, now seen corresponding path program 10 times [2023-02-14 10:19:25,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:25,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412762286] [2023-02-14 10:19:25,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:25,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:25,948 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:19:25,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149239585] [2023-02-14 10:19:25,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 10:19:25,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:25,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:25,949 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:19:25,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 10:19:26,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 10:19:26,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:19:26,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 109 conjunts are in the unsatisfiable core [2023-02-14 10:19:26,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:26,112 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 10:19:26,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,134 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 27 treesize of output 31 [2023-02-14 10:19:26,139 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 12 treesize of output 11 [2023-02-14 10:19:26,142 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 27 treesize of output 26 [2023-02-14 10:19:26,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,208 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 54 treesize of output 43 [2023-02-14 10:19:26,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2023-02-14 10:19:26,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2023-02-14 10:19:26,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:26,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2023-02-14 10:19:27,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,195 INFO L321 Elim1Store]: treesize reduction 78, result has 48.7 percent of original size [2023-02-14 10:19:27,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 158 [2023-02-14 10:19:27,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:27,630 INFO L321 Elim1Store]: treesize reduction 128, result has 49.2 percent of original size [2023-02-14 10:19:27,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 154 treesize of output 255 [2023-02-14 10:19:31,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:31,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:31,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:31,389 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:19:31,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 11 disjoint index pairs (out of 66 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 378 treesize of output 158 [2023-02-14 10:19:31,612 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 10:19:31,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:33,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:33,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412762286] [2023-02-14 10:19:33,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:19:33,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149239585] [2023-02-14 10:19:33,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149239585] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:33,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:19:33,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2023-02-14 10:19:33,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408629465] [2023-02-14 10:19:33,817 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:33,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 10:19:33,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:33,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 10:19:33,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2168, Unknown=0, NotChecked=0, Total=2450 [2023-02-14 10:19:33,819 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 31 states have internal predecessors, (41), 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 10:19:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:39,489 INFO L93 Difference]: Finished difference Result 228 states and 260 transitions. [2023-02-14 10:19:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-14 10:19:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 31 states have internal predecessors, (41), 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 45 [2023-02-14 10:19:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:39,491 INFO L225 Difference]: With dead ends: 228 [2023-02-14 10:19:39,491 INFO L226 Difference]: Without dead ends: 224 [2023-02-14 10:19:39,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=722, Invalid=4680, Unknown=0, NotChecked=0, Total=5402 [2023-02-14 10:19:39,493 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 72 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:39,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 439 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-14 10:19:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-02-14 10:19:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 174. [2023-02-14 10:19:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 149 states have (on average 1.1476510067114094) internal successors, (171), 149 states have internal predecessors, (171), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 10:19:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 195 transitions. [2023-02-14 10:19:39,539 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 195 transitions. Word has length 45 [2023-02-14 10:19:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:39,539 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 195 transitions. [2023-02-14 10:19:39,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 31 states have internal predecessors, (41), 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 10:19:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 195 transitions. [2023-02-14 10:19:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 10:19:39,540 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:39,540 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, 1, 1, 1] [2023-02-14 10:19:39,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 10:19:39,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:39,741 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:39,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:39,741 INFO L85 PathProgramCache]: Analyzing trace with hash 182249271, now seen corresponding path program 5 times [2023-02-14 10:19:39,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:39,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392951625] [2023-02-14 10:19:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:39,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:39,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:19:39,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328005370] [2023-02-14 10:19:39,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 10:19:39,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:39,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:39,758 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:19:39,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 10:19:39,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-14 10:19:39,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:19:39,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 105 conjunts are in the unsatisfiable core [2023-02-14 10:19:39,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:39,933 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 18 treesize of output 16 [2023-02-14 10:19:39,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:39,964 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 27 treesize of output 31 [2023-02-14 10:19:39,966 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 28 treesize of output 28 [2023-02-14 10:19:39,969 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 12 treesize of output 11 [2023-02-14 10:19:39,974 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 12 treesize of output 11 [2023-02-14 10:19:40,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,048 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 54 treesize of output 43 [2023-02-14 10:19:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,141 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 66 treesize of output 61 [2023-02-14 10:19:40,145 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 47 treesize of output 43 [2023-02-14 10:19:40,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,149 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 28 treesize of output 37 [2023-02-14 10:19:40,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,162 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 28 treesize of output 37 [2023-02-14 10:19:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2023-02-14 10:19:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:40,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2023-02-14 10:19:41,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,159 INFO L321 Elim1Store]: treesize reduction 78, result has 48.7 percent of original size [2023-02-14 10:19:41,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 158 [2023-02-14 10:19:41,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:41,501 INFO L321 Elim1Store]: treesize reduction 68, result has 36.4 percent of original size [2023-02-14 10:19:41,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 27 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 4 case distinctions, treesize of input 139 treesize of output 188 [2023-02-14 10:19:43,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:19:43,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 11 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 10 case distinctions, treesize of input 221 treesize of output 241 [2023-02-14 10:19:44,556 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 10:19:44,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:47,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:47,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392951625] [2023-02-14 10:19:47,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:19:47,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328005370] [2023-02-14 10:19:47,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328005370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:47,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:19:47,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2023-02-14 10:19:47,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388763974] [2023-02-14 10:19:47,451 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:47,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 10:19:47,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:47,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 10:19:47,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2146, Unknown=0, NotChecked=0, Total=2450 [2023-02-14 10:19:47,452 INFO L87 Difference]: Start difference. First operand 174 states and 195 transitions. Second operand has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 31 states have internal predecessors, (41), 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 10:19:52,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:19:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:52,504 INFO L93 Difference]: Finished difference Result 194 states and 216 transitions. [2023-02-14 10:19:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-14 10:19:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 31 states have internal predecessors, (41), 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 45 [2023-02-14 10:19:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:52,505 INFO L225 Difference]: With dead ends: 194 [2023-02-14 10:19:52,505 INFO L226 Difference]: Without dead ends: 190 [2023-02-14 10:19:52,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=499, Invalid=3407, Unknown=0, NotChecked=0, Total=3906 [2023-02-14 10:19:52,506 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:52,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 402 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1150 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-02-14 10:19:52,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-14 10:19:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 171. [2023-02-14 10:19:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 146 states have (on average 1.143835616438356) internal successors, (167), 146 states have internal predecessors, (167), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 10:19:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2023-02-14 10:19:52,561 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 45 [2023-02-14 10:19:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:52,562 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2023-02-14 10:19:52,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 31 states have internal predecessors, (41), 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 10:19:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2023-02-14 10:19:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 10:19:52,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:52,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:19:52,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-14 10:19:52,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-14 10:19:52,764 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:52,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:52,764 INFO L85 PathProgramCache]: Analyzing trace with hash 571342256, now seen corresponding path program 2 times [2023-02-14 10:19:52,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:52,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283260588] [2023-02-14 10:19:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:52,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:52,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:19:52,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198576359] [2023-02-14 10:19:52,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:19:52,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:52,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:52,781 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:19:52,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 10:19:52,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:19:52,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:19:52,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 103 conjunts are in the unsatisfiable core [2023-02-14 10:19:52,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:52,954 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 10:19:52,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:52,987 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 27 treesize of output 31 [2023-02-14 10:19:52,991 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 12 treesize of output 11 [2023-02-14 10:19:52,995 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 27 treesize of output 26 [2023-02-14 10:19:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:53,068 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 54 treesize of output 43 [2023-02-14 10:19:53,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:53,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:53,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:53,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2023-02-14 10:19:53,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:53,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:53,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:53,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:53,796 INFO L321 Elim1Store]: treesize reduction 46, result has 48.9 percent of original size [2023-02-14 10:19:53,796 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 3 case distinctions, treesize of input 66 treesize of output 98 [2023-02-14 10:19:54,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:54,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:54,109 INFO L321 Elim1Store]: treesize reduction 50, result has 49.5 percent of original size [2023-02-14 10:19:54,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 144 [2023-02-14 10:19:54,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:54,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:54,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:54,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:54,982 INFO L321 Elim1Store]: treesize reduction 46, result has 48.9 percent of original size [2023-02-14 10:19:54,983 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 3 case distinctions, treesize of input 101 treesize of output 113 [2023-02-14 10:19:55,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:55,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:55,460 INFO L321 Elim1Store]: treesize reduction 124, result has 17.3 percent of original size [2023-02-14 10:19:55,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 125 treesize of output 116 [2023-02-14 10:19:55,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 28 [2023-02-14 10:19:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:19:56,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:19:56,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:19:56,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283260588] [2023-02-14 10:19:56,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:19:56,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198576359] [2023-02-14 10:19:56,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198576359] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:19:56,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:19:56,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2023-02-14 10:19:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179462420] [2023-02-14 10:19:56,775 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:19:56,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-14 10:19:56,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:19:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-14 10:19:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1888, Unknown=0, NotChecked=0, Total=2162 [2023-02-14 10:19:56,777 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 30 states have internal predecessors, (41), 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 10:19:58,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:19:58,599 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2023-02-14 10:19:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-14 10:19:58,605 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 30 states have internal predecessors, (41), 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 47 [2023-02-14 10:19:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:19:58,606 INFO L225 Difference]: With dead ends: 199 [2023-02-14 10:19:58,606 INFO L226 Difference]: Without dead ends: 187 [2023-02-14 10:19:58,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=457, Invalid=3083, Unknown=0, NotChecked=0, Total=3540 [2023-02-14 10:19:58,607 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 10:19:58,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 345 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 10:19:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-02-14 10:19:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2023-02-14 10:19:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 154 states have (on average 1.1428571428571428) internal successors, (176), 154 states have internal predecessors, (176), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 10:19:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 202 transitions. [2023-02-14 10:19:58,670 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 202 transitions. Word has length 47 [2023-02-14 10:19:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:19:58,670 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 202 transitions. [2023-02-14 10:19:58,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 30 states have internal predecessors, (41), 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 10:19:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 202 transitions. [2023-02-14 10:19:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 10:19:58,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:19:58,671 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:19:58,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-14 10:19:58,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-14 10:19:58,877 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:19:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:19:58,878 INFO L85 PathProgramCache]: Analyzing trace with hash -439774994, now seen corresponding path program 3 times [2023-02-14 10:19:58,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:19:58,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019973127] [2023-02-14 10:19:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:19:58,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:19:58,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:19:58,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292321073] [2023-02-14 10:19:58,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:19:58,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:19:58,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:19:58,892 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:19:58,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 10:19:59,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-14 10:19:59,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:19:59,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-14 10:19:59,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:19:59,133 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 10:19:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:59,153 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 27 treesize of output 31 [2023-02-14 10:19:59,157 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 12 treesize of output 11 [2023-02-14 10:19:59,159 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 27 treesize of output 26 [2023-02-14 10:19:59,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:59,211 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 42 treesize of output 41 [2023-02-14 10:19:59,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:59,215 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 18 treesize of output 22 [2023-02-14 10:19:59,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:59,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-02-14 10:19:59,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:59,283 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 10:19:59,298 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2023-02-14 10:19:59,298 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 1 case distinctions, treesize of input 18 treesize of output 22 [2023-02-14 10:19:59,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:19:59,320 INFO L321 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2023-02-14 10:19:59,320 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 10:20:01,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:20:01,085 INFO L321 Elim1Store]: treesize reduction 66, result has 33.3 percent of original size [2023-02-14 10:20:01,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 88 [2023-02-14 10:20:01,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:20:01,367 INFO L321 Elim1Store]: treesize reduction 164, result has 15.5 percent of original size [2023-02-14 10:20:01,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 118 treesize of output 116 [2023-02-14 10:20:12,035 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:20:16,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:20:16,729 INFO L321 Elim1Store]: treesize reduction 110, result has 43.3 percent of original size [2023-02-14 10:20:16,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 125 treesize of output 192 [2023-02-14 10:20:17,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:20:17,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:20:17,928 INFO L321 Elim1Store]: treesize reduction 144, result has 35.4 percent of original size [2023-02-14 10:20:17,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 147 treesize of output 201 [2023-02-14 10:20:19,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:20:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:20:20,185 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:20:20,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 4 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 50 case distinctions, treesize of input 279 treesize of output 879