./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array5_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array5_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 21:58:59,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 21:58:59,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 21:59:00,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 21:59:00,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 21:59:00,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 21:59:00,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 21:59:00,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 21:59:00,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 21:59:00,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 21:59:00,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 21:59:00,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 21:59:00,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 21:59:00,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 21:59:00,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 21:59:00,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 21:59:00,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 21:59:00,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 21:59:00,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 21:59:00,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 21:59:00,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 21:59:00,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 21:59:00,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 21:59:00,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 21:59:00,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 21:59:00,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 21:59:00,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 21:59:00,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 21:59:00,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 21:59:00,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 21:59:00,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 21:59:00,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 21:59:00,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 21:59:00,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 21:59:00,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 21:59:00,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 21:59:00,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 21:59:00,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 21:59:00,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 21:59:00,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 21:59:00,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 21:59:00,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 21:59:00,057 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 21:59:00,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 21:59:00,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 21:59:00,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 21:59:00,058 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 21:59:00,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 21:59:00,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 21:59:00,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 21:59:00,059 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 21:59:00,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 21:59:00,059 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 21:59:00,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 21:59:00,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 21:59:00,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 21:59:00,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 21:59:00,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 21:59:00,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 21:59:00,061 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 21:59:00,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 21:59:00,061 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 21:59:00,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 21:59:00,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 21:59:00,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 21:59:00,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 21:59:00,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:59:00,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 21:59:00,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 21:59:00,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 21:59:00,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 21:59:00,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 21:59:00,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 21:59:00,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 21:59:00,063 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 21:59:00,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 21:59:00,063 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 21:59:00,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 [2023-02-14 21:59:00,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 21:59:00,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 21:59:00,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 21:59:00,275 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 21:59:00,275 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 21:59:00,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array5_pattern.c [2023-02-14 21:59:01,283 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 21:59:01,387 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 21:59:01,387 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array5_pattern.c [2023-02-14 21:59:01,391 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d1490d62/4f08d1f706234d53a660eff222033739/FLAGb045a8afb [2023-02-14 21:59:01,404 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d1490d62/4f08d1f706234d53a660eff222033739 [2023-02-14 21:59:01,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 21:59:01,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 21:59:01,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 21:59:01,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 21:59:01,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 21:59:01,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3def8c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01, skipping insertion in model container [2023-02-14 21:59:01,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 21:59:01,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 21:59:01,565 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array5_pattern.c[1890,1903] [2023-02-14 21:59:01,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:59:01,586 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 21:59:01,602 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array5_pattern.c[1890,1903] [2023-02-14 21:59:01,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:59:01,623 INFO L208 MainTranslator]: Completed translation [2023-02-14 21:59:01,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01 WrapperNode [2023-02-14 21:59:01,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 21:59:01,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 21:59:01,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 21:59:01,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 21:59:01,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,668 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-02-14 21:59:01,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 21:59:01,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 21:59:01,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 21:59:01,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 21:59:01,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,683 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 21:59:01,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 21:59:01,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 21:59:01,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 21:59:01,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (1/1) ... [2023-02-14 21:59:01,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:59:01,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:01,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 21:59:01,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 21:59:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 21:59:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 21:59:01,781 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 21:59:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 21:59:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 21:59:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 21:59:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 21:59:01,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 21:59:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 21:59:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 21:59:01,835 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 21:59:01,836 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 21:59:01,996 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 21:59:02,000 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 21:59:02,000 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 21:59:02,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:59:02 BoogieIcfgContainer [2023-02-14 21:59:02,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 21:59:02,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 21:59:02,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 21:59:02,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 21:59:02,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:59:01" (1/3) ... [2023-02-14 21:59:02,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ea20ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:59:02, skipping insertion in model container [2023-02-14 21:59:02,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:59:01" (2/3) ... [2023-02-14 21:59:02,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ea20ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:59:02, skipping insertion in model container [2023-02-14 21:59:02,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:59:02" (3/3) ... [2023-02-14 21:59:02,007 INFO L112 eAbstractionObserver]: Analyzing ICFG array5_pattern.c [2023-02-14 21:59:02,017 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 21:59:02,017 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 21:59:02,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 21:59:02,049 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;@f5fabba, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 21:59:02,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 21:59:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 21:59:02,056 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:02,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:02,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2023-02-14 21:59:02,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766672296] [2023-02-14 21:59:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:02,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:59:02,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 21:59:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:59:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:59:02,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:59:02,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766672296] [2023-02-14 21:59:02,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766672296] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:59:02,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:59:02,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 21:59:02,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15053992] [2023-02-14 21:59:02,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:59:02,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 21:59:02,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:59:02,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 21:59:02,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 21:59:02,194 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 21:59:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:59:02,206 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2023-02-14 21:59:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 21:59:02,208 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-14 21:59:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:59:02,211 INFO L225 Difference]: With dead ends: 53 [2023-02-14 21:59:02,211 INFO L226 Difference]: Without dead ends: 24 [2023-02-14 21:59:02,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 21:59:02,215 INFO L413 NwaCegarLoop]: 33 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, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:59:02,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:59:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-14 21:59:02,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-14 21:59:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-14 21:59:02,237 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2023-02-14 21:59:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:59:02,238 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-14 21:59:02,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 21:59:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-14 21:59:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 21:59:02,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:02,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:02,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 21:59:02,239 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:02,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:02,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1765206397, now seen corresponding path program 1 times [2023-02-14 21:59:02,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:02,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021718718] [2023-02-14 21:59:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:02,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:02,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:59:02,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302483217] [2023-02-14 21:59:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:02,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:02,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:02,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:59:02,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 21:59:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:59:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-14 21:59:02,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:59:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:59:02,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 21:59:02,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:59:02,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021718718] [2023-02-14 21:59:02,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:59:02,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302483217] [2023-02-14 21:59:02,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302483217] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:59:02,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:59:02,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 21:59:02,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451466992] [2023-02-14 21:59:02,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:59:02,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 21:59:02,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:59:02,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 21:59:02,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 21:59:02,380 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:59:02,433 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-14 21:59:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 21:59:02,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-14 21:59:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:59:02,435 INFO L225 Difference]: With dead ends: 55 [2023-02-14 21:59:02,436 INFO L226 Difference]: Without dead ends: 38 [2023-02-14 21:59:02,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 21:59:02,437 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:59:02,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:59:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-14 21:59:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2023-02-14 21:59:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:59:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-02-14 21:59:02,453 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 25 [2023-02-14 21:59:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:59:02,454 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-02-14 21:59:02,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-02-14 21:59:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 21:59:02,456 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:02,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:02,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 21:59:02,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:02,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash 955859771, now seen corresponding path program 1 times [2023-02-14 21:59:02,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:02,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61114194] [2023-02-14 21:59:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:02,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:02,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:59:02,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016662910] [2023-02-14 21:59:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:02,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:02,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:02,721 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:59:02,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 21:59:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:59:02,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 21:59:02,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:59:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:59:02,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 21:59:02,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:59:02,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61114194] [2023-02-14 21:59:02,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:59:02,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016662910] [2023-02-14 21:59:02,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016662910] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:59:02,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:59:02,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 21:59:02,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465329089] [2023-02-14 21:59:02,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:59:02,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 21:59:02,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:59:02,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 21:59:02,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 21:59:02,803 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:59:02,816 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-02-14 21:59:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 21:59:02,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-14 21:59:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:59:02,817 INFO L225 Difference]: With dead ends: 33 [2023-02-14 21:59:02,817 INFO L226 Difference]: Without dead ends: 29 [2023-02-14 21:59:02,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 21:59:02,818 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:59:02,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:59:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-14 21:59:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-14 21:59:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:59:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-02-14 21:59:02,821 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 25 [2023-02-14 21:59:02,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:59:02,822 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-02-14 21:59:02,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:02,822 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-02-14 21:59:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 21:59:02,823 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:02,823 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:02,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 21:59:03,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-14 21:59:03,028 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash -488527555, now seen corresponding path program 1 times [2023-02-14 21:59:03,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:03,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640318158] [2023-02-14 21:59:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:03,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:03,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:59:03,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040955291] [2023-02-14 21:59:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:03,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:03,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:03,061 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:59:03,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 21:59:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:59:03,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 21:59:03,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:59:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:59:03,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 21:59:03,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:59:03,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640318158] [2023-02-14 21:59:03,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:59:03,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040955291] [2023-02-14 21:59:03,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040955291] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:59:03,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:59:03,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 21:59:03,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474592528] [2023-02-14 21:59:03,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:59:03,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 21:59:03,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:59:03,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 21:59:03,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 21:59:03,168 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:59:03,236 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2023-02-14 21:59:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 21:59:03,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-14 21:59:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:59:03,237 INFO L225 Difference]: With dead ends: 57 [2023-02-14 21:59:03,237 INFO L226 Difference]: Without dead ends: 33 [2023-02-14 21:59:03,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:59:03,238 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:59:03,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 62 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:59:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-14 21:59:03,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2023-02-14 21:59:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:59:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-02-14 21:59:03,241 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 27 [2023-02-14 21:59:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:59:03,241 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-02-14 21:59:03,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-02-14 21:59:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 21:59:03,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:03,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:03,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 21:59:03,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:03,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash -309168389, now seen corresponding path program 1 times [2023-02-14 21:59:03,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:03,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365517994] [2023-02-14 21:59:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:03,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:03,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:59:03,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964584585] [2023-02-14 21:59:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:03,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:03,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:03,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:59:03,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 21:59:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:59:03,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 21:59:03,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:59:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 21:59:03,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:59:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:59:03,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:59:03,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365517994] [2023-02-14 21:59:03,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:59:03,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964584585] [2023-02-14 21:59:03,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964584585] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:59:03,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:59:03,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-02-14 21:59:03,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341997628] [2023-02-14 21:59:03,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:59:03,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 21:59:03,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:59:03,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 21:59:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-14 21:59:03,813 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:59:03,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:59:03,965 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2023-02-14 21:59:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 21:59:03,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-02-14 21:59:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:59:03,966 INFO L225 Difference]: With dead ends: 124 [2023-02-14 21:59:03,967 INFO L226 Difference]: Without dead ends: 105 [2023-02-14 21:59:03,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-02-14 21:59:03,968 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:59:03,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 115 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:59:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-14 21:59:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 51. [2023-02-14 21:59:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 21:59:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-02-14 21:59:03,975 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 29 [2023-02-14 21:59:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:59:03,975 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-02-14 21:59:03,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:59:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-02-14 21:59:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 21:59:03,976 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:03,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:03,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 21:59:04,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:04,181 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:04,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1010232967, now seen corresponding path program 1 times [2023-02-14 21:59:04,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:04,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778536347] [2023-02-14 21:59:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:04,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:04,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:59:04,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983615591] [2023-02-14 21:59:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:04,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:04,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:04,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:59:04,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 21:59:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:59:04,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 21:59:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:59:04,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 21:59:04,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:04,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-14 21:59:04,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 21:59:04,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2023-02-14 21:59:04,559 INFO L321 Elim1Store]: treesize reduction 14, result has 33.3 percent of original size [2023-02-14 21:59:04,560 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 2 case distinctions, treesize of input 38 treesize of output 20 [2023-02-14 21:59:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:59:04,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:59:04,691 INFO L321 Elim1Store]: treesize reduction 20, result has 64.3 percent of original size [2023-02-14 21:59:04,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 111 [2023-02-14 21:59:04,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:59:04,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 155 [2023-02-14 21:59:04,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:59:04,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 156 [2023-02-14 21:59:04,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:59:04,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 147 [2023-02-14 21:59:04,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:59:04,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 177 [2023-02-14 21:59:05,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 21:59:05,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:59:05,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778536347] [2023-02-14 21:59:05,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:59:05,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983615591] [2023-02-14 21:59:05,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983615591] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:59:05,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:59:05,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2023-02-14 21:59:05,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222141846] [2023-02-14 21:59:05,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:59:05,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 21:59:05,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:59:05,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 21:59:05,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-02-14 21:59:05,403 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 24 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 21:59:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:59:06,502 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2023-02-14 21:59:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-14 21:59:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 24 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-02-14 21:59:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:59:06,504 INFO L225 Difference]: With dead ends: 86 [2023-02-14 21:59:06,504 INFO L226 Difference]: Without dead ends: 44 [2023-02-14 21:59:06,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=573, Invalid=2397, Unknown=0, NotChecked=0, Total=2970 [2023-02-14 21:59:06,505 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 193 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 21:59:06,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 198 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 21:59:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-14 21:59:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2023-02-14 21:59:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:59:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-02-14 21:59:06,509 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 29 [2023-02-14 21:59:06,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:59:06,509 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-02-14 21:59:06,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 24 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 21:59:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-02-14 21:59:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 21:59:06,510 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:06,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:06,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 21:59:06,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:06,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:06,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:06,711 INFO L85 PathProgramCache]: Analyzing trace with hash 256298297, now seen corresponding path program 2 times [2023-02-14 21:59:06,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:06,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715751300] [2023-02-14 21:59:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:06,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:06,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:59:06,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908836874] [2023-02-14 21:59:06,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:59:06,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:06,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:06,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:59:06,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 21:59:06,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:59:06,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:59:06,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 21:59:06,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:59:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:59:06,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:59:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:59:06,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:59:06,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715751300] [2023-02-14 21:59:06,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:59:06,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908836874] [2023-02-14 21:59:06,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908836874] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:59:06,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:59:06,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-14 21:59:06,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473222173] [2023-02-14 21:59:06,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:59:06,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 21:59:06,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:59:06,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 21:59:06,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-14 21:59:06,918 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:59:07,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:59:07,116 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-02-14 21:59:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 21:59:07,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-14 21:59:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:59:07,117 INFO L225 Difference]: With dead ends: 47 [2023-02-14 21:59:07,117 INFO L226 Difference]: Without dead ends: 43 [2023-02-14 21:59:07,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-14 21:59:07,118 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 21:59:07,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 58 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 21:59:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-14 21:59:07,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2023-02-14 21:59:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:59:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-14 21:59:07,123 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2023-02-14 21:59:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:59:07,123 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-14 21:59:07,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:59:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-14 21:59:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 21:59:07,124 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:07,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:07,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 21:59:07,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:07,329 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1542761403, now seen corresponding path program 3 times [2023-02-14 21:59:07,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:07,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280266526] [2023-02-14 21:59:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:07,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:07,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:59:07,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176502354] [2023-02-14 21:59:07,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:59:07,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:07,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:07,343 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:59:07,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 21:59:07,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 21:59:07,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:59:07,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-14 21:59:07,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:59:07,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 21:59:07,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:07,443 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 [2023-02-14 21:59:07,446 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 [2023-02-14 21:59:07,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 21:59:07,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 21:59:07,499 INFO L321 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2023-02-14 21:59:07,499 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 2 case distinctions, treesize of input 54 treesize of output 49 [2023-02-14 21:59:07,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:07,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:07,940 INFO L321 Elim1Store]: treesize reduction 33, result has 36.5 percent of original size [2023-02-14 21:59:07,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 77 [2023-02-14 21:59:08,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:08,690 INFO L321 Elim1Store]: treesize reduction 298, result has 42.4 percent of original size [2023-02-14 21:59:08,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 161 treesize of output 313 [2023-02-14 21:59:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:59:10,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:59:11,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:59:11,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280266526] [2023-02-14 21:59:11,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:59:11,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176502354] [2023-02-14 21:59:11,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176502354] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:59:11,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 21:59:11,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-14 21:59:11,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956184870] [2023-02-14 21:59:11,167 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 21:59:11,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 21:59:11,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:59:11,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 21:59:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2023-02-14 21:59:11,169 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:21,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 21:59:23,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 21:59:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:59:23,530 INFO L93 Difference]: Finished difference Result 108 states and 135 transitions. [2023-02-14 21:59:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 21:59:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-02-14 21:59:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:59:23,532 INFO L225 Difference]: With dead ends: 108 [2023-02-14 21:59:23,532 INFO L226 Difference]: Without dead ends: 80 [2023-02-14 21:59:23,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=280, Invalid=1358, Unknown=2, NotChecked=0, Total=1640 [2023-02-14 21:59:23,534 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-14 21:59:23,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 183 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 286 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2023-02-14 21:59:23,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-14 21:59:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2023-02-14 21:59:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 21:59:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-02-14 21:59:23,563 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 33 [2023-02-14 21:59:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:59:23,563 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-02-14 21:59:23,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-02-14 21:59:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 21:59:23,567 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:23,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:23,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 21:59:23,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:23,775 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:23,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:23,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2129567417, now seen corresponding path program 2 times [2023-02-14 21:59:23,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:23,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859625330] [2023-02-14 21:59:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:23,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:23,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:59:23,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331020172] [2023-02-14 21:59:23,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:59:23,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:23,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:23,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:59:23,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 21:59:23,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:59:23,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:59:23,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-14 21:59:23,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:59:23,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 21:59:23,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:23,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-14 21:59:23,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 21:59:23,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-14 21:59:23,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:23,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:23,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2023-02-14 21:59:24,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:24,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:24,177 INFO L321 Elim1Store]: treesize reduction 76, result has 37.2 percent of original size [2023-02-14 21:59:24,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 81 [2023-02-14 21:59:24,466 INFO L321 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2023-02-14 21:59:24,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 61 [2023-02-14 21:59:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:59:24,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:59:26,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:59:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859625330] [2023-02-14 21:59:26,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:59:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331020172] [2023-02-14 21:59:26,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331020172] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:59:26,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 21:59:26,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-14 21:59:26,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319275515] [2023-02-14 21:59:26,315 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 21:59:26,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 21:59:26,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:59:26,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 21:59:26,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-02-14 21:59:26,317 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:59:27,161 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-02-14 21:59:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 21:59:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-02-14 21:59:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:59:27,167 INFO L225 Difference]: With dead ends: 71 [2023-02-14 21:59:27,167 INFO L226 Difference]: Without dead ends: 67 [2023-02-14 21:59:27,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 21:59:27,169 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 21:59:27,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 164 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 21:59:27,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-14 21:59:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2023-02-14 21:59:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 21:59:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-02-14 21:59:27,198 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 33 [2023-02-14 21:59:27,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:59:27,198 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-02-14 21:59:27,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-02-14 21:59:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 21:59:27,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:27,201 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:27,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 21:59:27,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-14 21:59:27,407 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:27,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash 883225021, now seen corresponding path program 4 times [2023-02-14 21:59:27,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:27,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942973373] [2023-02-14 21:59:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:27,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:27,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:59:27,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109551115] [2023-02-14 21:59:27,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 21:59:27,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:27,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:27,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:59:27,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 21:59:27,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 21:59:27,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:59:27,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 21:59:27,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:59:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:59:27,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:59:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:59:27,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:59:27,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942973373] [2023-02-14 21:59:27,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:59:27,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109551115] [2023-02-14 21:59:27,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109551115] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:59:27,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:59:27,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-14 21:59:27,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428236869] [2023-02-14 21:59:27,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:59:27,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 21:59:27,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:59:27,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 21:59:27,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-14 21:59:27,602 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:59:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:59:27,943 INFO L93 Difference]: Finished difference Result 167 states and 205 transitions. [2023-02-14 21:59:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 21:59:27,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-02-14 21:59:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:59:27,945 INFO L225 Difference]: With dead ends: 167 [2023-02-14 21:59:27,945 INFO L226 Difference]: Without dead ends: 135 [2023-02-14 21:59:27,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-14 21:59:27,946 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 138 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 21:59:27,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 167 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 21:59:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-14 21:59:27,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2023-02-14 21:59:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 85 states have internal predecessors, (105), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 21:59:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2023-02-14 21:59:27,964 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 35 [2023-02-14 21:59:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:59:27,964 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2023-02-14 21:59:27,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:59:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2023-02-14 21:59:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 21:59:27,965 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:27,965 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:27,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-14 21:59:28,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 21:59:28,170 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:28,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1728258427, now seen corresponding path program 5 times [2023-02-14 21:59:28,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:28,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374153372] [2023-02-14 21:59:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:28,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:28,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:59:28,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951411349] [2023-02-14 21:59:28,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 21:59:28,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:28,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:28,207 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:59:28,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 21:59:28,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-14 21:59:28,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:59:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-14 21:59:28,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:59:28,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 21:59:28,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-14 21:59:28,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 21:59:28,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-14 21:59:28,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2023-02-14 21:59:28,438 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 35 treesize of output 33 [2023-02-14 21:59:28,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2023-02-14 21:59:28,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2023-02-14 21:59:28,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,526 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 56 treesize of output 51 [2023-02-14 21:59:28,538 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 40 treesize of output 36 [2023-02-14 21:59:28,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,543 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 23 treesize of output 32 [2023-02-14 21:59:28,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,554 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 23 treesize of output 32 [2023-02-14 21:59:28,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,796 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 78 treesize of output 69 [2023-02-14 21:59:28,810 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 53 treesize of output 47 [2023-02-14 21:59:28,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,829 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2023-02-14 21:59:28,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 54 [2023-02-14 21:59:28,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:28,851 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-14 21:59:28,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 52 [2023-02-14 21:59:29,415 INFO L321 Elim1Store]: treesize reduction 136, result has 39.6 percent of original size [2023-02-14 21:59:29,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 141 [2023-02-14 21:59:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:59:29,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:59:29,706 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (.cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (.cse4 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (.cse5 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse9 (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))) (and (forall ((v_ArrVal_449 (Array Int Int)) (|aux_mod_ULTIMATE.start_main_~index~0#1_40| Int) (|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (or (= (let ((.cse7 (* 4 |aux_mod_ULTIMATE.start_main_~index~0#1_40|)) (.cse8 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_449) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse7 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse8) .cse10))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse6 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse7 .cse8) .cse9)) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 .cse2) (select .cse0 .cse3) (select .cse1 .cse4) (select .cse0 .cse5))))) 0) (= |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0) (>= |aux_mod_ULTIMATE.start_main_~index~0#1_40| 2) (> 0 |aux_mod_ULTIMATE.start_main_~index~0#1_40|))) (forall ((v_ArrVal_449 (Array Int Int)) (|aux_mod_ULTIMATE.start_main_~index~0#1_40| Int) (|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (or (= (let ((.cse13 (* 4 |aux_mod_ULTIMATE.start_main_~index~0#1_40|)) (.cse14 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse11 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_449) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse13 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse14) .cse10))) (let ((.cse12 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse6 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse13 .cse14) .cse9)) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse11) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse11 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse12 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse12 .cse2) (select .cse11 .cse3) (select .cse12 .cse4) (select .cse11 .cse5))))) 0) (= |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0) (>= |aux_mod_ULTIMATE.start_main_~index~0#1_40| 2) (not (< (+ (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|) |aux_mod_ULTIMATE.start_main_~index~0#1_40|) 0)) (> 0 |aux_mod_ULTIMATE.start_main_~index~0#1_40|))))) is different from false [2023-02-14 21:59:29,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:59:29,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374153372] [2023-02-14 21:59:29,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:59:29,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951411349] [2023-02-14 21:59:29,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951411349] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:59:29,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 21:59:29,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-14 21:59:29,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096199286] [2023-02-14 21:59:29,741 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 21:59:29,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 21:59:29,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:59:29,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 21:59:29,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=557, Unknown=1, NotChecked=48, Total=702 [2023-02-14 21:59:29,742 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:59:30,698 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2023-02-14 21:59:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 21:59:30,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-02-14 21:59:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:59:30,699 INFO L225 Difference]: With dead ends: 122 [2023-02-14 21:59:30,699 INFO L226 Difference]: Without dead ends: 118 [2023-02-14 21:59:30,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=246, Invalid=1479, Unknown=1, NotChecked=80, Total=1806 [2023-02-14 21:59:30,700 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 21:59:30,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 211 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 21:59:30,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-14 21:59:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2023-02-14 21:59:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 91 states have internal predecessors, (112), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 21:59:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2023-02-14 21:59:30,716 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 37 [2023-02-14 21:59:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:59:30,716 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2023-02-14 21:59:30,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 21:59:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2023-02-14 21:59:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 21:59:30,718 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:59:30,718 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:59:30,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 21:59:30,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 21:59:30,923 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:59:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:59:30,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1286845191, now seen corresponding path program 3 times [2023-02-14 21:59:30,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:59:30,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620152770] [2023-02-14 21:59:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:59:30,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:59:30,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:59:30,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343536972] [2023-02-14 21:59:30,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:59:30,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:59:30,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:59:30,943 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:59:30,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 21:59:31,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 21:59:31,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:59:31,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-14 21:59:31,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:59:31,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 21:59:31,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-14 21:59:31,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-14 21:59:31,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 21:59:31,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 21:59:31,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,163 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 38 treesize of output 37 [2023-02-14 21:59:31,166 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 31 treesize of output 29 [2023-02-14 21:59:31,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2023-02-14 21:59:31,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2023-02-14 21:59:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,219 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 60 treesize of output 55 [2023-02-14 21:59:31,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,241 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2023-02-14 21:59:31,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 34 [2023-02-14 21:59:31,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,261 INFO L321 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2023-02-14 21:59:31,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 70 [2023-02-14 21:59:31,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,722 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 82 treesize of output 73 [2023-02-14 21:59:31,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,768 INFO L321 Elim1Store]: treesize reduction 70, result has 40.7 percent of original size [2023-02-14 21:59:31,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 34 treesize of output 68 [2023-02-14 21:59:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:31,815 INFO L321 Elim1Store]: treesize reduction 128, result has 27.3 percent of original size [2023-02-14 21:59:31,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 140 [2023-02-14 21:59:33,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:33,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:59:34,054 INFO L321 Elim1Store]: treesize reduction 820, result has 40.8 percent of original size [2023-02-14 21:59:34,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 3 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 259 treesize of output 707