./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/eqn5.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 4e0883f4fdefc9bee6f97a4f9cfd1a3af8920c2853d796abd89e2a581ffdb6b5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 09:59:08,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:59:08,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:59:08,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:59:08,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:59:08,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:59:08,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:59:08,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:59:08,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:59:08,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:59:08,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:59:08,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:59:08,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:59:08,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:59:08,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:59:09,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:59:09,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:59:09,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:59:09,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:59:09,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:59:09,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:59:09,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:59:09,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:59:09,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:59:09,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:59:09,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:59:09,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:59:09,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:59:09,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:59:09,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:59:09,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:59:09,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:59:09,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:59:09,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:59:09,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:59:09,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:59:09,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:59:09,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:59:09,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:59:09,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:59:09,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:59:09,023 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:59:09,049 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:59:09,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:59:09,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:59:09,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:59:09,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:59:09,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:59:09,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:59:09,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:59:09,052 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:59:09,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:59:09,053 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:59:09,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:59:09,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:59:09,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:59:09,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:59:09,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:59:09,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:59:09,054 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:59:09,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:59:09,054 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:59:09,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:59:09,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:59:09,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:59:09,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:59:09,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:59:09,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:59:09,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:59:09,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:59:09,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:59:09,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:59:09,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:59:09,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:59:09,057 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:59:09,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:59:09,057 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:59:09,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e0883f4fdefc9bee6f97a4f9cfd1a3af8920c2853d796abd89e2a581ffdb6b5 [2023-02-15 09:59:09,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:59:09,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:59:09,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:59:09,327 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:59:09,328 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:59:09,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn5.c [2023-02-15 09:59:10,465 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:59:10,652 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:59:10,652 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c [2023-02-15 09:59:10,658 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20db90ba5/2c28d2762e7f498eacff0a723eb54238/FLAG1e4105118 [2023-02-15 09:59:10,673 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20db90ba5/2c28d2762e7f498eacff0a723eb54238 [2023-02-15 09:59:10,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:59:10,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:59:10,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:59:10,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:59:10,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:59:10,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:10,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@433c876c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10, skipping insertion in model container [2023-02-15 09:59:10,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:10,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:59:10,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:59:10,866 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2023-02-15 09:59:10,898 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:59:10,910 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:59:10,926 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2023-02-15 09:59:10,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:59:10,952 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:59:10,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10 WrapperNode [2023-02-15 09:59:10,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:59:10,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:59:10,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:59:10,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:59:10,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:10,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:11,003 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-02-15 09:59:11,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:59:11,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:59:11,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:59:11,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:59:11,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:11,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:11,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:11,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:11,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:11,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:11,044 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:11,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:11,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:59:11,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:59:11,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:59:11,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:59:11,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (1/1) ... [2023-02-15 09:59:11,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:59:11,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:11,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 09:59:11,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 09:59:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:59:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:59:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:59:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 09:59:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:59:11,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:59:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:59:11,189 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:59:11,191 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:59:11,345 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:59:11,350 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:59:11,351 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 09:59:11,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:59:11 BoogieIcfgContainer [2023-02-15 09:59:11,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:59:11,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:59:11,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:59:11,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:59:11,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:59:10" (1/3) ... [2023-02-15 09:59:11,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748f421b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:59:11, skipping insertion in model container [2023-02-15 09:59:11,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:59:10" (2/3) ... [2023-02-15 09:59:11,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748f421b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:59:11, skipping insertion in model container [2023-02-15 09:59:11,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:59:11" (3/3) ... [2023-02-15 09:59:11,361 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn5.c [2023-02-15 09:59:11,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:59:11,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:59:11,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:59:11,465 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;@63666ff4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:59:11,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:59:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 09:59:11,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:11,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:11,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:11,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2023-02-15 09:59:11,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:11,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256949731] [2023-02-15 09:59:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:11,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:59:11,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:11,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256949731] [2023-02-15 09:59:11,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 09:59:11,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051637322] [2023-02-15 09:59:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:11,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:11,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:11,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:11,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 09:59:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:59:11,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 09:59:11,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:11,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:59:11,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051637322] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:59:11,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:59:11,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 09:59:11,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780184709] [2023-02-15 09:59:11,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:59:11,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 09:59:11,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 09:59:11,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 09:59:11,857 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:59:11,872 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-02-15 09:59:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 09:59:11,875 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 09:59:11,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:59:11,888 INFO L225 Difference]: With dead ends: 38 [2023-02-15 09:59:11,889 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 09:59:11,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 09:59:11,898 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:59:11,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:59:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 09:59:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 09:59:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-15 09:59:11,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-02-15 09:59:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:59:11,924 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-15 09:59:11,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-15 09:59:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 09:59:11,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:11,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:11,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 09:59:12,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 09:59:12,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:12,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2023-02-15 09:59:12,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:12,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518100828] [2023-02-15 09:59:12,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:12,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:12,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:59:12,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970391618] [2023-02-15 09:59:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:12,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:12,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:12,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:12,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 09:59:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:59:12,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 09:59:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:12,403 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 09:59:12,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 09:59:12,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 09:59:12,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 09:59:12,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-15 09:59:12,541 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 09:59:12,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-15 09:59:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:12,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:59:12,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:12,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518100828] [2023-02-15 09:59:12,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:59:12,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970391618] [2023-02-15 09:59:12,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970391618] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:59:12,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:59:12,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 09:59:12,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838004871] [2023-02-15 09:59:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:59:12,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 09:59:12,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 09:59:12,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:59:12,621 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:59:12,714 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-02-15 09:59:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 09:59:12,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 09:59:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:59:12,717 INFO L225 Difference]: With dead ends: 34 [2023-02-15 09:59:12,717 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 09:59:12,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:59:12,721 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:59:12,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 56 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:59:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 09:59:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2023-02-15 09:59:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-15 09:59:12,738 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2023-02-15 09:59:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:59:12,738 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-15 09:59:12,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:12,739 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-15 09:59:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 09:59:12,739 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:12,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:12,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 09:59:12,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 09:59:12,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2023-02-15 09:59:12,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:12,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080394281] [2023-02-15 09:59:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:12,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:12,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:59:12,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139592516] [2023-02-15 09:59:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:12,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:12,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:12,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:12,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 09:59:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:59:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 09:59:13,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:13,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:59:13,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:13,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080394281] [2023-02-15 09:59:13,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:59:13,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139592516] [2023-02-15 09:59:13,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139592516] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:59:13,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:59:13,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 09:59:13,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369113852] [2023-02-15 09:59:13,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:59:13,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 09:59:13,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 09:59:13,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:59:13,077 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:59:13,152 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-02-15 09:59:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 09:59:13,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 09:59:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:59:13,155 INFO L225 Difference]: With dead ends: 49 [2023-02-15 09:59:13,155 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 09:59:13,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:59:13,166 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:59:13,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:59:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 09:59:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2023-02-15 09:59:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-15 09:59:13,176 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2023-02-15 09:59:13,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:59:13,176 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-15 09:59:13,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-15 09:59:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 09:59:13,178 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:13,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:13,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 09:59:13,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:13,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:13,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2023-02-15 09:59:13,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:13,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214868427] [2023-02-15 09:59:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:13,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:13,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:59:13,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050227591] [2023-02-15 09:59:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:13,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:13,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:13,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:13,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 09:59:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:59:13,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 09:59:13,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:13,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:59:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:13,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:13,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214868427] [2023-02-15 09:59:13,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:59:13,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050227591] [2023-02-15 09:59:13,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050227591] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:59:13,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:59:13,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-02-15 09:59:13,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832491938] [2023-02-15 09:59:13,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:59:13,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 09:59:13,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:13,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 09:59:13,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 09:59:13,531 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:59:13,642 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-02-15 09:59:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 09:59:13,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 09:59:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:59:13,643 INFO L225 Difference]: With dead ends: 44 [2023-02-15 09:59:13,644 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 09:59:13,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-15 09:59:13,649 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:59:13,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:59:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 09:59:13,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2023-02-15 09:59:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:13,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-15 09:59:13,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2023-02-15 09:59:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:59:13,661 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-15 09:59:13,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-15 09:59:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 09:59:13,663 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:13,663 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:13,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 09:59:13,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:13,868 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:13,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2023-02-15 09:59:13,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:13,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095432992] [2023-02-15 09:59:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:13,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:13,885 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:59:13,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752647077] [2023-02-15 09:59:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:13,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:13,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:13,886 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:13,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 09:59:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:59:13,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 09:59:13,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:14,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:59:14,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:14,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095432992] [2023-02-15 09:59:14,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:59:14,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752647077] [2023-02-15 09:59:14,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752647077] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:59:14,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:59:14,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 09:59:14,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683700414] [2023-02-15 09:59:14,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:59:14,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 09:59:14,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:14,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 09:59:14,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 09:59:14,016 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:59:14,090 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2023-02-15 09:59:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 09:59:14,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 09:59:14,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:59:14,091 INFO L225 Difference]: With dead ends: 41 [2023-02-15 09:59:14,091 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 09:59:14,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-02-15 09:59:14,092 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:59:14,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:59:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 09:59:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-15 09:59:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-15 09:59:14,098 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2023-02-15 09:59:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:59:14,098 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-15 09:59:14,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-15 09:59:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 09:59:14,099 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:14,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:14,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 09:59:14,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:14,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:14,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:14,306 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2023-02-15 09:59:14,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:14,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972603404] [2023-02-15 09:59:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:14,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:14,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:59:14,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550462094] [2023-02-15 09:59:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:14,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:14,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:14,355 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:14,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 09:59:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:59:14,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 09:59:14,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:14,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:59:14,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:14,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-02-15 09:59:14,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 09:59:14,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 09:59:14,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 09:59:14,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-15 09:59:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:14,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:59:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:14,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:14,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972603404] [2023-02-15 09:59:14,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:59:14,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550462094] [2023-02-15 09:59:14,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550462094] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:59:14,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:59:14,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-02-15 09:59:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651736042] [2023-02-15 09:59:14,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:59:14,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 09:59:14,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:14,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 09:59:14,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-15 09:59:14,642 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:59:14,877 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-02-15 09:59:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:59:14,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 09:59:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:59:14,878 INFO L225 Difference]: With dead ends: 54 [2023-02-15 09:59:14,878 INFO L226 Difference]: Without dead ends: 52 [2023-02-15 09:59:14,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-02-15 09:59:14,879 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:59:14,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 59 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:59:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-15 09:59:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 26. [2023-02-15 09:59:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-15 09:59:14,885 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2023-02-15 09:59:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:59:14,885 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-15 09:59:14,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:14,885 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-15 09:59:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 09:59:14,886 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:14,886 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:14,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 09:59:15,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:15,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:15,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:15,096 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2023-02-15 09:59:15,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:15,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178007907] [2023-02-15 09:59:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:15,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:15,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:59:15,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506918229] [2023-02-15 09:59:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:15,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:15,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:15,120 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:15,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 09:59:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:59:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 09:59:15,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:15,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:59:15,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:15,242 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 19 treesize of output 23 [2023-02-15 09:59:15,246 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 20 treesize of output 20 [2023-02-15 09:59:15,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 09:59:15,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 09:59:15,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:15,293 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 09:59:15,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2023-02-15 09:59:15,380 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:59:15,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:15,393 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2023-02-15 09:59:15,394 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 45 treesize of output 42 [2023-02-15 09:59:15,569 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-02-15 09:59:15,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 35 [2023-02-15 09:59:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:15,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:59:26,657 WARN L233 SmtUtils]: Spent 8.55s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 09:59:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:26,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:26,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178007907] [2023-02-15 09:59:26,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:59:26,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506918229] [2023-02-15 09:59:26,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506918229] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:59:26,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:59:26,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-15 09:59:26,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7727922] [2023-02-15 09:59:26,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:59:26,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 09:59:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 09:59:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=191, Unknown=1, NotChecked=0, Total=240 [2023-02-15 09:59:26,675 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:59:28,687 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-02-15 09:59:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 09:59:28,688 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-15 09:59:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:59:28,688 INFO L225 Difference]: With dead ends: 82 [2023-02-15 09:59:28,688 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 09:59:28,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=240, Invalid=815, Unknown=1, NotChecked=0, Total=1056 [2023-02-15 09:59:28,689 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 162 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 09:59:28,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 105 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 09:59:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 09:59:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2023-02-15 09:59:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-02-15 09:59:28,703 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 20 [2023-02-15 09:59:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:59:28,704 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-02-15 09:59:28,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-02-15 09:59:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 09:59:28,705 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:28,705 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:28,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 09:59:28,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:28,906 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:28,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:28,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1334592554, now seen corresponding path program 2 times [2023-02-15 09:59:28,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:28,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45691069] [2023-02-15 09:59:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:28,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:28,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:59:28,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344384321] [2023-02-15 09:59:28,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:59:28,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:28,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:28,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:28,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 09:59:29,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:59:29,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:59:29,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:59:29,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:59:29,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:59:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:59:29,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:29,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45691069] [2023-02-15 09:59:29,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:59:29,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344384321] [2023-02-15 09:59:29,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344384321] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:59:29,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:59:29,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 09:59:29,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840242612] [2023-02-15 09:59:29,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:59:29,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 09:59:29,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:29,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 09:59:29,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 09:59:29,116 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:59:29,243 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2023-02-15 09:59:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 09:59:29,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-15 09:59:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:59:29,245 INFO L225 Difference]: With dead ends: 103 [2023-02-15 09:59:29,245 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 09:59:29,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-15 09:59:29,246 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:59:29,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 38 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:59:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 09:59:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2023-02-15 09:59:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-02-15 09:59:29,258 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 20 [2023-02-15 09:59:29,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:59:29,258 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-02-15 09:59:29,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-02-15 09:59:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 09:59:29,259 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:29,259 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:29,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 09:59:29,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 09:59:29,467 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:29,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 3 times [2023-02-15 09:59:29,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:29,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113276917] [2023-02-15 09:59:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:29,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:29,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:59:29,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004140731] [2023-02-15 09:59:29,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:59:29,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:29,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:29,510 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:29,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 09:59:29,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 09:59:29,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:59:29,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:59:29,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:29,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:59:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:29,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:29,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113276917] [2023-02-15 09:59:29,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:59:29,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004140731] [2023-02-15 09:59:29,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004140731] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:59:29,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:59:29,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-15 09:59:29,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859123856] [2023-02-15 09:59:29,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:59:29,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 09:59:29,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:29,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 09:59:29,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 09:59:29,776 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:59:30,053 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2023-02-15 09:59:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 09:59:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-15 09:59:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:59:30,054 INFO L225 Difference]: With dead ends: 113 [2023-02-15 09:59:30,054 INFO L226 Difference]: Without dead ends: 81 [2023-02-15 09:59:30,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2023-02-15 09:59:30,055 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 113 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:59:30,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 71 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:59:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-15 09:59:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2023-02-15 09:59:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-15 09:59:30,063 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 22 [2023-02-15 09:59:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:59:30,064 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-15 09:59:30,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:30,064 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-15 09:59:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 09:59:30,065 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:30,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:30,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 09:59:30,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:30,266 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1083970380, now seen corresponding path program 2 times [2023-02-15 09:59:30,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:30,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196038265] [2023-02-15 09:59:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:30,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:30,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:59:30,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866539335] [2023-02-15 09:59:30,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:59:30,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:30,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:30,288 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:30,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 09:59:30,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:59:30,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:59:30,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 09:59:30,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:59:30,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:59:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:59:30,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:30,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196038265] [2023-02-15 09:59:30,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:59:30,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866539335] [2023-02-15 09:59:30,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866539335] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:59:30,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:59:30,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-02-15 09:59:30,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004280590] [2023-02-15 09:59:30,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:59:30,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 09:59:30,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 09:59:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-15 09:59:30,488 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:59:30,749 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-02-15 09:59:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 09:59:30,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-15 09:59:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:59:30,750 INFO L225 Difference]: With dead ends: 83 [2023-02-15 09:59:30,750 INFO L226 Difference]: Without dead ends: 67 [2023-02-15 09:59:30,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2023-02-15 09:59:30,751 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 121 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:59:30,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 91 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:59:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-15 09:59:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2023-02-15 09:59:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-02-15 09:59:30,757 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2023-02-15 09:59:30,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:59:30,757 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-02-15 09:59:30,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:30,757 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-02-15 09:59:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 09:59:30,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:30,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:30,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 09:59:30,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 09:59:30,961 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2023-02-15 09:59:30,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:30,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018453634] [2023-02-15 09:59:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:30,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:59:31,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443375646] [2023-02-15 09:59:31,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:59:31,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:31,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:31,006 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:31,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 09:59:31,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:59:31,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:59:31,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 09:59:31,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:31,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:59:31,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:31,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-02-15 09:59:31,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 09:59:31,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 09:59:31,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 09:59:31,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 09:59:31,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2023-02-15 09:59:31,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:31,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:31,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-15 09:59:31,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2023-02-15 09:59:31,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:31,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:31,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-15 09:59:31,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:31,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:31,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 17 [2023-02-15 09:59:31,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:31,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 09:59:31,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-15 09:59:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:31,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:59:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:59:32,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:32,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018453634] [2023-02-15 09:59:32,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:59:32,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443375646] [2023-02-15 09:59:32,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443375646] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:59:32,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:59:32,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-02-15 09:59:32,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65942000] [2023-02-15 09:59:32,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:59:32,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 09:59:32,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:32,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 09:59:32,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=278, Unknown=1, NotChecked=0, Total=380 [2023-02-15 09:59:32,214 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:59:33,090 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2023-02-15 09:59:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 09:59:33,091 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-15 09:59:33,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:59:33,093 INFO L225 Difference]: With dead ends: 111 [2023-02-15 09:59:33,093 INFO L226 Difference]: Without dead ends: 109 [2023-02-15 09:59:33,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=311, Invalid=810, Unknown=1, NotChecked=0, Total=1122 [2023-02-15 09:59:33,094 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 09:59:33,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 158 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 09:59:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-15 09:59:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 49. [2023-02-15 09:59:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-02-15 09:59:33,106 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2023-02-15 09:59:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:59:33,107 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-02-15 09:59:33,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:59:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-02-15 09:59:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 09:59:33,109 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:59:33,109 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:59:33,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 09:59:33,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 09:59:33,316 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:59:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:59:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 3 times [2023-02-15 09:59:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:59:33,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207658022] [2023-02-15 09:59:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:59:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:59:33,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:59:33,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338517351] [2023-02-15 09:59:33,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:59:33,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:59:33,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:59:33,334 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:59:33,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 09:59:33,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 09:59:33,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:59:33,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-15 09:59:33,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:59:33,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:59:33,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,542 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 19 treesize of output 23 [2023-02-15 09:59:33,546 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 20 treesize of output 20 [2023-02-15 09:59:33,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 09:59:33,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 09:59:33,592 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 09:59:33,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2023-02-15 09:59:33,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:59:33,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2023-02-15 09:59:33,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 88 [2023-02-15 09:59:33,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,711 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 09:59:33,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 49 [2023-02-15 09:59:33,824 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 09:59:33,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 156 [2023-02-15 09:59:33,835 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:59:33,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:33,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2023-02-15 09:59:34,052 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 09:59:34,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 212 treesize of output 186 [2023-02-15 09:59:34,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:34,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:34,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:34,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:34,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 235 [2023-02-15 09:59:34,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:34,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:34,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:59:34,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 164 [2023-02-15 09:59:34,620 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-02-15 09:59:34,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 48 [2023-02-15 09:59:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:59:34,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:59:49,807 WARN L233 SmtUtils]: Spent 8.66s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 09:59:51,908 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse33 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) (let ((.cse1 (<= .cse33 2147483647)) (.cse32 (* .cse33 8)) (.cse31 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse0 (<= .cse31 2147483647)) (.cse11 (+ .cse32 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse12 (not .cse1)) (.cse7 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse8 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse18 (+ .cse32 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse10 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse19 (* .cse31 8))) (and (or (not .cse0) (let ((.cse2 (+ 10 (select .cse10 (+ .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (and (or .cse1 (forall ((v_ArrVal_430 Int)) (or (not (<= .cse2 v_ArrVal_430)) (= (let ((.cse9 (store .cse10 .cse11 v_ArrVal_430))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse9))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse3 (select .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse4 (select .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse3 .cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse6 .cse7 (+ .cse3 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8)))))) 31)))) (or .cse12 (forall ((v_ArrVal_430 Int)) (or (= 31 (let ((.cse17 (store .cse10 .cse18 v_ArrVal_430))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse17))) (let ((.cse14 (select .cse13 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse15 (select .cse14 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse16 (select .cse17 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse13 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse14 .cse7 (+ .cse15 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) .cse15 .cse16)))))) (not (<= .cse2 v_ArrVal_430)))))))) (or .cse0 (let ((.cse20 (+ (select .cse10 (+ .cse19 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) 10))) (and (or .cse1 (forall ((v_ArrVal_430 Int)) (or (not (<= .cse20 v_ArrVal_430)) (= (let ((.cse25 (store .cse10 .cse11 v_ArrVal_430))) (let ((.cse23 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse25))) (let ((.cse24 (select .cse23 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse21 (select .cse24 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse22 (select .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse21 .cse22 (select (select (store .cse23 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse24 .cse7 (+ .cse21 .cse22))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8)))))) 31)))) (or .cse12 (forall ((v_ArrVal_430 Int)) (or (= 31 (let ((.cse30 (store .cse10 .cse18 v_ArrVal_430))) (let ((.cse26 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse30))) (let ((.cse27 (select .cse26 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse28 (select .cse27 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse29 (select .cse30 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse26 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse27 .cse7 (+ .cse28 .cse29))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) .cse28 .cse29)))))) (not (<= .cse20 v_ArrVal_430)))))))))))) is different from false [2023-02-15 09:59:54,350 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse55 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse54 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse51 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse53 (* .cse54 8)) (.cse1 (<= .cse55 2147483647)) (.cse52 (* .cse55 8)) (.cse22 (<= .cse54 2147483647))) (let ((.cse23 (not .cse22)) (.cse17 (+ .cse52 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse18 (not .cse1)) (.cse29 (+ .cse53 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse6 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse7 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse20 (+ .cse53 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse10 (+ .cse52 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse19 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse31 (* 8 .cse51)) (.cse0 (<= .cse51 2147483647))) (and (or .cse0 (let ((.cse30 (select .cse19 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse31)))) (let ((.cse11 (+ .cse30 20)) (.cse21 (+ .cse30 10))) (and (or (let ((.cse9 (store .cse19 .cse20 .cse21))) (and (or .cse1 (forall ((v_ArrVal_430 Int)) (or (= 31 (let ((.cse8 (store .cse9 .cse10 v_ArrVal_430))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse8))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse2 (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (select .cse5 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse2 .cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse5 .cse6 (+ .cse2 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))))))) (not (<= .cse11 v_ArrVal_430))))) (or (forall ((v_ArrVal_430 Int)) (or (= (let ((.cse16 (store .cse9 .cse17 v_ArrVal_430))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse16))) (let ((.cse14 (select .cse13 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse12 (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse15 (select .cse14 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse12 (select (select (store .cse13 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse14 .cse6 (+ .cse12 .cse15))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7) .cse15))))) 31) (not (<= .cse11 v_ArrVal_430)))) .cse18))) .cse22) (or .cse23 (forall ((v_ArrVal_430 Int)) (or (not (<= .cse11 v_ArrVal_430)) (= 31 (let ((.cse28 (store (store .cse19 .cse29 .cse21) .cse17 v_ArrVal_430))) (let ((.cse26 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse28))) (let ((.cse27 (select .cse26 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse24 (select .cse27 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse25 (select .cse28 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse24 .cse25 (select (select (store .cse26 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse27 .cse6 (+ .cse24 .cse25))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7)))))))))))))) (or (let ((.cse50 (select .cse19 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse31)))) (let ((.cse44 (+ 10 .cse50)) (.cse38 (+ 20 .cse50))) (and (or .cse23 (let ((.cse37 (store .cse19 .cse29 .cse44))) (and (or (forall ((v_ArrVal_430 Int)) (or (= (let ((.cse36 (store .cse37 .cse17 v_ArrVal_430))) (let ((.cse33 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse36))) (let ((.cse34 (select .cse33 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse32 (select .cse34 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse35 (select .cse36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse32 (select (select (store .cse33 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse34 .cse6 (+ .cse32 .cse35))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7) .cse35))))) 31) (not (<= .cse38 v_ArrVal_430)))) .cse18) (or .cse1 (forall ((v_ArrVal_430 Int)) (or (= 31 (let ((.cse43 (store .cse37 .cse10 v_ArrVal_430))) (let ((.cse41 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse43))) (let ((.cse42 (select .cse41 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse39 (select .cse43 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse40 (select .cse42 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse39 .cse40 (select (select (store .cse41 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse42 .cse6 (+ .cse39 .cse40))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))))))) (not (<= .cse38 v_ArrVal_430)))))))) (or .cse22 (forall ((v_ArrVal_430 Int)) (or (= (let ((.cse49 (store (store .cse19 .cse20 .cse44) .cse10 v_ArrVal_430))) (let ((.cse47 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse49))) (let ((.cse48 (select .cse47 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse45 (select .cse49 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse46 (select .cse48 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse45 .cse46 (select (select (store .cse47 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse48 .cse6 (+ .cse45 .cse46))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7)))))) 31) (not (<= .cse38 v_ArrVal_430)))))))) (not .cse0)))))) is different from false [2023-02-15 09:59:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-02-15 09:59:54,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:59:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207658022] [2023-02-15 09:59:54,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:59:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338517351] [2023-02-15 09:59:54,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338517351] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:59:54,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:59:54,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2023-02-15 09:59:54,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831633] [2023-02-15 09:59:54,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:59:54,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 09:59:54,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:59:54,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 09:59:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=570, Unknown=4, NotChecked=102, Total=812 [2023-02-15 09:59:54,699 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:00:28,461 WARN L233 SmtUtils]: Spent 23.72s on a formula simplification. DAG size of input: 135 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:00:42,726 WARN L233 SmtUtils]: Spent 13.87s on a formula simplification. DAG size of input: 187 DAG size of output: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:00:55,504 WARN L233 SmtUtils]: Spent 11.14s on a formula simplification. DAG size of input: 131 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:01:00,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:01:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:19,884 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2023-02-15 10:01:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-15 10:01:19,884 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-15 10:01:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:19,885 INFO L225 Difference]: With dead ends: 138 [2023-02-15 10:01:19,885 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 10:01:19,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 98.2s TimeCoverageRelationStatistics Valid=909, Invalid=3517, Unknown=4, NotChecked=262, Total=4692 [2023-02-15 10:01:19,887 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 238 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 91 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:19,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 177 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 358 Invalid, 1 Unknown, 111 Unchecked, 6.2s Time] [2023-02-15 10:01:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 10:01:19,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 63. [2023-02-15 10:01:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:01:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2023-02-15 10:01:19,913 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 28 [2023-02-15 10:01:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:19,914 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2023-02-15 10:01:19,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:01:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2023-02-15 10:01:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 10:01:19,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:19,918 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:19,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:20,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 10:01:20,119 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash 48972360, now seen corresponding path program 4 times [2023-02-15 10:01:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:20,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142954310] [2023-02-15 10:01:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:20,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:20,148 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:20,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608463061] [2023-02-15 10:01:20,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 10:01:20,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:20,151 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:01:20,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 10:01:20,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 10:01:20,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:01:20,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-15 10:01:20,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:20,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 10:01:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,389 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 19 treesize of output 23 [2023-02-15 10:01:20,394 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 20 treesize of output 20 [2023-02-15 10:01:20,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:01:20,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:01:20,439 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:01:20,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2023-02-15 10:01:20,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-15 10:01:20,464 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:01:20,521 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:01:20,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2023-02-15 10:01:20,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-15 10:01:20,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,551 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 73 treesize of output 24 [2023-02-15 10:01:20,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,587 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:01:20,588 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 28 treesize of output 30 [2023-02-15 10:01:20,649 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:01:20,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 127 [2023-02-15 10:01:20,654 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:01:20,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 194 [2023-02-15 10:01:20,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,717 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 81 treesize of output 32 [2023-02-15 10:01:20,790 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:01:20,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 71 [2023-02-15 10:01:20,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 123 [2023-02-15 10:01:20,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:20,886 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:01:20,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 44 [2023-02-15 10:01:21,037 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:01:21,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2023-02-15 10:01:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:01:21,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:01:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:01:32,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142954310] [2023-02-15 10:01:32,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:01:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608463061] [2023-02-15 10:01:32,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608463061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:01:32,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:01:32,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2023-02-15 10:01:32,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707297342] [2023-02-15 10:01:32,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:01:32,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 10:01:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:32,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 10:01:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-02-15 10:01:32,418 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:01:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:44,246 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2023-02-15 10:01:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 10:01:44,247 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-15 10:01:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:44,247 INFO L225 Difference]: With dead ends: 167 [2023-02-15 10:01:44,247 INFO L226 Difference]: Without dead ends: 165 [2023-02-15 10:01:44,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=601, Invalid=2369, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 10:01:44,249 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 378 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:44,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 195 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-02-15 10:01:44,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-15 10:01:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 89. [2023-02-15 10:01:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 88 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:01:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2023-02-15 10:01:44,267 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 28 [2023-02-15 10:01:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:44,268 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2023-02-15 10:01:44,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:01:44,268 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2023-02-15 10:01:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 10:01:44,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:44,269 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:44,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:44,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 10:01:44,476 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 480713034, now seen corresponding path program 5 times [2023-02-15 10:01:44,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:44,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868194250] [2023-02-15 10:01:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:44,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:44,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:44,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545626905] [2023-02-15 10:01:44,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 10:01:44,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:44,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:44,497 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:01:44,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process