./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array17_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/array17_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 1bbdbab39b20ef0f9bb51ea0fb71bf773586866898cf5babc34262381f9b9103 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:44:12,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:44:12,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:44:13,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:44:13,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:44:13,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:44:13,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:44:13,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:44:13,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:44:13,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:44:13,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:44:13,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:44:13,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:44:13,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:44:13,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:44:13,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:44:13,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:44:13,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:44:13,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:44:13,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:44:13,054 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:44:13,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:44:13,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:44:13,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:44:13,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:44:13,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:44:13,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:44:13,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:44:13,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:44:13,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:44:13,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:44:13,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:44:13,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:44:13,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:44:13,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:44:13,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:44:13,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:44:13,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:44:13,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:44:13,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:44:13,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:44:13,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:44:13,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:44:13,105 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:44:13,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:44:13,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:44:13,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:44:13,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:44:13,107 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:44:13,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:44:13,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:44:13,108 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:44:13,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:44:13,109 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:44:13,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:44:13,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:44:13,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:44:13,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:44:13,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:44:13,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:44:13,111 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:44:13,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:44:13,112 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:44:13,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:44:13,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:44:13,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:44:13,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:44:13,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:44:13,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:44:13,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:44:13,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:44:13,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:44:13,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:44:13,114 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:44:13,114 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:44:13,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:44:13,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bbdbab39b20ef0f9bb51ea0fb71bf773586866898cf5babc34262381f9b9103 [2022-07-20 21:44:13,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:44:13,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:44:13,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:44:13,386 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:44:13,386 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:44:13,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array17_pattern.c [2022-07-20 21:44:13,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bec4b0f1d/ea8d19c908e54dbeb20e3da6c9951874/FLAG321985a36 [2022-07-20 21:44:13,857 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:44:13,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array17_pattern.c [2022-07-20 21:44:13,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bec4b0f1d/ea8d19c908e54dbeb20e3da6c9951874/FLAG321985a36 [2022-07-20 21:44:14,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bec4b0f1d/ea8d19c908e54dbeb20e3da6c9951874 [2022-07-20 21:44:14,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:44:14,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:44:14,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:44:14,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:44:14,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:44:14,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da50e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14, skipping insertion in model container [2022-07-20 21:44:14,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:44:14,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:44:14,403 WARN L230 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/array17_pattern.c[1441,1454] [2022-07-20 21:44:14,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:44:14,426 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:44:14,437 WARN L230 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/array17_pattern.c[1441,1454] [2022-07-20 21:44:14,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:44:14,462 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:44:14,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14 WrapperNode [2022-07-20 21:44:14,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:44:14,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:44:14,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:44:14,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:44:14,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,521 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-07-20 21:44:14,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:44:14,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:44:14,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:44:14,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:44:14,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:44:14,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:44:14,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:44:14,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:44:14,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14" (1/1) ... [2022-07-20 21:44:14,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:44:14,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:44:14,592 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) [2022-07-20 21:44:14,609 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 [2022-07-20 21:44:14,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:44:14,632 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-20 21:44:14,633 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-20 21:44:14,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:44:14,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:44:14,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:44:14,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:44:14,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:44:14,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:44:14,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:44:14,713 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:44:14,714 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:44:14,940 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:44:14,945 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:44:14,959 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-20 21:44:14,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:44:14 BoogieIcfgContainer [2022-07-20 21:44:14,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:44:14,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:44:14,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:44:14,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:44:14,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:44:14" (1/3) ... [2022-07-20 21:44:14,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24017b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:44:14, skipping insertion in model container [2022-07-20 21:44:14,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:14" (2/3) ... [2022-07-20 21:44:14,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24017b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:44:14, skipping insertion in model container [2022-07-20 21:44:14,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:44:14" (3/3) ... [2022-07-20 21:44:14,975 INFO L111 eAbstractionObserver]: Analyzing ICFG array17_pattern.c [2022-07-20 21:44:14,987 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:44:14,987 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:44:15,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:44:15,054 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5b09c44d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@532ef3af [2022-07-20 21:44:15,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:44:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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) [2022-07-20 21:44:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 21:44:15,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:44:15,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:44:15,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:44:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:44:15,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2132324569, now seen corresponding path program 1 times [2022-07-20 21:44:15,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:44:15,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280992785] [2022-07-20 21:44:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:15,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:44:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:44:15,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:44:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:44:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:44:15,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:44:15,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280992785] [2022-07-20 21:44:15,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280992785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:44:15,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:44:15,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:44:15,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722728874] [2022-07-20 21:44:15,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:44:15,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:44:15,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:44:15,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:44:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:44:15,256 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 21:44:15,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:44:15,275 INFO L93 Difference]: Finished difference Result 63 states and 97 transitions. [2022-07-20 21:44:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:44:15,278 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-20 21:44:15,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:44:15,284 INFO L225 Difference]: With dead ends: 63 [2022-07-20 21:44:15,284 INFO L226 Difference]: Without dead ends: 29 [2022-07-20 21:44:15,287 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 [2022-07-20 21:44:15,296 INFO L413 NwaCegarLoop]: 41 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, 41 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 [2022-07-20 21:44:15,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:44:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-20 21:44:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-20 21:44:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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) [2022-07-20 21:44:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-07-20 21:44:15,334 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 15 [2022-07-20 21:44:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:44:15,334 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-07-20 21:44:15,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 21:44:15,335 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-07-20 21:44:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 21:44:15,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:44:15,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:44:15,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:44:15,339 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:44:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:44:15,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1872922357, now seen corresponding path program 1 times [2022-07-20 21:44:15,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:44:15,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385716534] [2022-07-20 21:44:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:15,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:44:15,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:44:15,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857941678] [2022-07-20 21:44:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:15,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:44:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:44:15,395 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) [2022-07-20 21:44:15,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:44:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:44:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 21:44:15,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:44:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:44:15,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:44:15,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:44:15,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385716534] [2022-07-20 21:44:15,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:44:15,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857941678] [2022-07-20 21:44:15,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857941678] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:44:15,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:44:15,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:44:15,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405767553] [2022-07-20 21:44:15,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:44:15,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:44:15,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:44:15,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:44:15,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:44:15,582 INFO L87 Difference]: Start difference. First operand 29 states and 37 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:44:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:44:15,603 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-07-20 21:44:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:44:15,603 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-20 21:44:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:44:15,604 INFO L225 Difference]: With dead ends: 36 [2022-07-20 21:44:15,604 INFO L226 Difference]: Without dead ends: 32 [2022-07-20 21:44:15,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:44:15,606 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 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 [2022-07-20 21:44:15,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:44:15,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-20 21:44:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-20 21:44:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 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) [2022-07-20 21:44:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-20 21:44:15,613 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2022-07-20 21:44:15,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:44:15,614 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-20 21:44:15,614 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:44:15,614 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-20 21:44:15,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 21:44:15,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:44:15,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:44:15,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 21:44:15,827 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 [2022-07-20 21:44:15,828 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:44:15,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:44:15,828 INFO L85 PathProgramCache]: Analyzing trace with hash 212512359, now seen corresponding path program 1 times [2022-07-20 21:44:15,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:44:15,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939686906] [2022-07-20 21:44:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:15,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:44:15,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:44:15,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200306743] [2022-07-20 21:44:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:15,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:44:15,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:44:15,844 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) [2022-07-20 21:44:15,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:44:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:44:15,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:44:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:44:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 21:44:15,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:44:15,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:44:15,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939686906] [2022-07-20 21:44:15,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:44:15,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200306743] [2022-07-20 21:44:15,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200306743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:44:15,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:44:15,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 21:44:15,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801358885] [2022-07-20 21:44:15,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:44:15,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 21:44:15,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:44:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 21:44:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:44:15,965 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-07-20 21:44:16,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:44:16,037 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2022-07-20 21:44:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 21:44:16,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 [2022-07-20 21:44:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:44:16,039 INFO L225 Difference]: With dead ends: 67 [2022-07-20 21:44:16,039 INFO L226 Difference]: Without dead ends: 42 [2022-07-20 21:44:16,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:44:16,041 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:44:16,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:44:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-20 21:44:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2022-07-20 21:44:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2022-07-20 21:44:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-07-20 21:44:16,047 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 35 [2022-07-20 21:44:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:44:16,048 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-07-20 21:44:16,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-07-20 21:44:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-07-20 21:44:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 21:44:16,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:44:16,050 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:44:16,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:44:16,263 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 [2022-07-20 21:44:16,264 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:44:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:44:16,264 INFO L85 PathProgramCache]: Analyzing trace with hash -654332553, now seen corresponding path program 1 times [2022-07-20 21:44:16,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:44:16,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729393286] [2022-07-20 21:44:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:16,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:44:16,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:44:16,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393886329] [2022-07-20 21:44:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:16,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:44:16,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:44:16,278 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) [2022-07-20 21:44:16,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:44:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:44:16,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:44:16,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:44:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:44:16,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:44:16,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:44:16,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729393286] [2022-07-20 21:44:16,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:44:16,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393886329] [2022-07-20 21:44:16,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393886329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:44:16,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:44:16,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:44:16,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353287409] [2022-07-20 21:44:16,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:44:16,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:44:16,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:44:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:44:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:44:16,368 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-07-20 21:44:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:44:16,409 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-07-20 21:44:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:44:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 38 [2022-07-20 21:44:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:44:16,410 INFO L225 Difference]: With dead ends: 64 [2022-07-20 21:44:16,411 INFO L226 Difference]: Without dead ends: 36 [2022-07-20 21:44:16,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:44:16,412 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:44:16,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 53 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:44:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-20 21:44:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-07-20 21:44:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 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) [2022-07-20 21:44:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-07-20 21:44:16,418 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 38 [2022-07-20 21:44:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:44:16,418 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-07-20 21:44:16,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-07-20 21:44:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-07-20 21:44:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 21:44:16,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:44:16,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:44:16,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-20 21:44:16,639 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 [2022-07-20 21:44:16,640 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:44:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:44:16,640 INFO L85 PathProgramCache]: Analyzing trace with hash 579061941, now seen corresponding path program 1 times [2022-07-20 21:44:16,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:44:16,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686811453] [2022-07-20 21:44:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:16,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:44:16,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:44:16,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060779007] [2022-07-20 21:44:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:16,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:44:16,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:44:16,654 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) [2022-07-20 21:44:16,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:44:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:44:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 21:44:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:44:16,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 40 [2022-07-20 21:44:16,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 21:44:16,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 21:44:17,360 INFO L356 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2022-07-20 21:44:17,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 22 [2022-07-20 21:44:17,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 170 [2022-07-20 21:44:17,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 727 [2022-07-20 21:44:17,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 206 [2022-07-20 21:44:17,877 INFO L356 Elim1Store]: treesize reduction 23, result has 11.5 percent of original size [2022-07-20 21:44:17,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 228 treesize of output 207 [2022-07-20 21:44:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:44:17,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:44:53,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:44:53,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686811453] [2022-07-20 21:44:53,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:44:53,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060779007] [2022-07-20 21:44:53,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060779007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:44:53,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:44:53,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-20 21:44:53,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496723084] [2022-07-20 21:44:53,125 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 21:44:53,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 21:44:53,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:44:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 21:44:53,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=641, Unknown=7, NotChecked=0, Total=756 [2022-07-20 21:44:53,127 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 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) [2022-07-20 21:44:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:44:58,417 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2022-07-20 21:44:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:44:58,418 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 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 40 [2022-07-20 21:44:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:44:58,419 INFO L225 Difference]: With dead ends: 97 [2022-07-20 21:44:58,420 INFO L226 Difference]: Without dead ends: 72 [2022-07-20 21:44:58,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=192, Invalid=1132, Unknown=8, NotChecked=0, Total=1332 [2022-07-20 21:44:58,421 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 30 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:44:58,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 276 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 171 Invalid, 0 Unknown, 233 Unchecked, 0.2s Time] [2022-07-20 21:44:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-20 21:44:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2022-07-20 21:44:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 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) [2022-07-20 21:44:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-07-20 21:44:58,438 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 40 [2022-07-20 21:44:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:44:58,440 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-07-20 21:44:58,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 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) [2022-07-20 21:44:58,442 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-07-20 21:44:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 21:44:58,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:44:58,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:44:58,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:44:58,649 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 [2022-07-20 21:44:58,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:44:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:44:58,650 INFO L85 PathProgramCache]: Analyzing trace with hash -700801737, now seen corresponding path program 1 times [2022-07-20 21:44:58,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:44:58,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627330433] [2022-07-20 21:44:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:58,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:44:58,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:44:58,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637190865] [2022-07-20 21:44:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:58,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:44:58,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:44:58,668 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) [2022-07-20 21:44:58,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:44:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:44:58,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:44:58,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:44:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:44:58,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:44:58,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:44:58,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627330433] [2022-07-20 21:44:58,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:44:58,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637190865] [2022-07-20 21:44:58,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637190865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:44:58,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:44:58,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:44:58,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929664302] [2022-07-20 21:44:58,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:44:58,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:44:58,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:44:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:44:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:44:58,728 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:44:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:44:58,751 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2022-07-20 21:44:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:44:58,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-20 21:44:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:44:58,753 INFO L225 Difference]: With dead ends: 95 [2022-07-20 21:44:58,753 INFO L226 Difference]: Without dead ends: 72 [2022-07-20 21:44:58,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:44:58,754 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:44:58,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 71 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:44:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-20 21:44:58,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2022-07-20 21:44:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 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) [2022-07-20 21:44:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-07-20 21:44:58,764 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 40 [2022-07-20 21:44:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:44:58,765 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-07-20 21:44:58,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:44:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-07-20 21:44:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 21:44:58,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:44:58,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:44:58,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-20 21:44:58,991 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 [2022-07-20 21:44:58,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:44:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:44:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1287607751, now seen corresponding path program 1 times [2022-07-20 21:44:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:44:58,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271382405] [2022-07-20 21:44:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:58,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:44:59,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:44:59,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323294294] [2022-07-20 21:44:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:44:59,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:44:59,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:44:59,004 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) [2022-07-20 21:44:59,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:44:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:44:59,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:44:59,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:44:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 21:44:59,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:44:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 21:44:59,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:44:59,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271382405] [2022-07-20 21:44:59,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:44:59,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323294294] [2022-07-20 21:44:59,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323294294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:44:59,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:44:59,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-07-20 21:44:59,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257339064] [2022-07-20 21:44:59,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:44:59,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 21:44:59,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:44:59,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 21:44:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:44:59,481 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 18 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 21:44:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:44:59,969 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2022-07-20 21:44:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 21:44:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 40 [2022-07-20 21:44:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:44:59,972 INFO L225 Difference]: With dead ends: 167 [2022-07-20 21:44:59,972 INFO L226 Difference]: Without dead ends: 142 [2022-07-20 21:44:59,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:44:59,973 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 140 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:44:59,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 173 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:44:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-20 21:44:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 90. [2022-07-20 21:44:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 21:44:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2022-07-20 21:44:59,997 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 40 [2022-07-20 21:44:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:44:59,998 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2022-07-20 21:44:59,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 21:44:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2022-07-20 21:45:00,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:45:00,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:45:00,005 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 21:45:00,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:45:00,223 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 [2022-07-20 21:45:00,224 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:45:00,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:45:00,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1706965193, now seen corresponding path program 2 times [2022-07-20 21:45:00,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:45:00,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406272502] [2022-07-20 21:45:00,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:45:00,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:45:00,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:45:00,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136734291] [2022-07-20 21:45:00,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:45:00,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:45:00,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:45:00,237 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) [2022-07-20 21:45:00,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:45:00,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:45:00,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:45:00,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:45:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:45:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:45:00,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:45:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:45:00,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:45:00,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406272502] [2022-07-20 21:45:00,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:45:00,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136734291] [2022-07-20 21:45:00,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136734291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:45:00,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:45:00,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-20 21:45:00,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083991739] [2022-07-20 21:45:00,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:45:00,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 21:45:00,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:45:00,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 21:45:00,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:45:00,430 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:45:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:45:00,620 INFO L93 Difference]: Finished difference Result 171 states and 204 transitions. [2022-07-20 21:45:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 21:45:00,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-07-20 21:45:00,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:45:00,623 INFO L225 Difference]: With dead ends: 171 [2022-07-20 21:45:00,623 INFO L226 Difference]: Without dead ends: 137 [2022-07-20 21:45:00,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:45:00,625 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 86 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:45:00,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 156 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:45:00,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-20 21:45:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 99. [2022-07-20 21:45:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 86 states have internal predecessors, (99), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 21:45:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2022-07-20 21:45:00,642 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 42 [2022-07-20 21:45:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:45:00,642 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2022-07-20 21:45:00,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:45:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2022-07-20 21:45:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:45:00,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:45:00,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 21:45:00,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:45:00,866 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 [2022-07-20 21:45:00,867 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:45:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:45:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash 460196979, now seen corresponding path program 3 times [2022-07-20 21:45:00,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:45:00,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731471488] [2022-07-20 21:45:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:45:00,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:45:00,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:45:00,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490112701] [2022-07-20 21:45:00,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:45:00,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:45:00,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:45:00,879 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) [2022-07-20 21:45:00,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:45:01,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:45:01,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:45:01,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 21:45:01,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:45:01,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 170 [2022-07-20 21:45:01,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 727 [2022-07-20 21:45:02,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:45:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:45:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:45:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:45:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:45:02,923 INFO L356 Elim1Store]: treesize reduction 355, result has 12.1 percent of original size [2022-07-20 21:45:02,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 617 treesize of output 723 [2022-07-20 21:45:03,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:45:03,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:45:03,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:45:03,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:45:05,291 INFO L356 Elim1Store]: treesize reduction 1416, result has 21.9 percent of original size [2022-07-20 21:45:05,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 10 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 11 new quantified variables, introduced 22 case distinctions, treesize of input 1262 treesize of output 10819 [2022-07-20 21:46:06,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:06,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:06,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:06,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:06,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:06,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:06,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:06,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:06,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:06,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:06,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:06,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:06,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:06,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 5 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 8159 treesize of output 12106 [2022-07-20 21:46:08,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:08,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:08,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:08,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:08,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:08,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:08,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:08,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:08,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:09,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:09,132 INFO L244 Elim1Store]: Index analysis took 353 ms [2022-07-20 21:46:09,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:09,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 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 2387 treesize of output 6435 [2022-07-20 21:46:10,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:10,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:10,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:10,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:10,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:10,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:10,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:10,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:10,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:10,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:10,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:10,300 INFO L244 Elim1Store]: Index analysis took 204 ms [2022-07-20 21:46:10,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:10,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 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 2387 treesize of output 9541 [2022-07-20 21:46:18,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:18,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:18,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:18,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:18,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:46:18,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:18,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:18,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:18,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:18,862 INFO L244 Elim1Store]: Index analysis took 436 ms [2022-07-20 21:46:18,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:46:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731471488] [2022-07-20 21:46:18,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:46:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490112701] [2022-07-20 21:46:18,863 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-20 21:46:18,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:46:19,064 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 [2022-07-20 21:46:19,064 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ClassCastException: class de.uni_freiburg.informatik.ultimate.logic.ConstantTerm cannot be cast to class de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm (de.uni_freiburg.informatik.ultimate.logic.ConstantTerm and de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @17f9344b) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.MultiDimensionalSelect.(MultiDimensionalSelect.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.constructNestedStoreUpdateConstraintForOnePosition(ArrayIndexEqualityManager.java:415) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.constructNestedStoreUpdateConstraint(ArrayIndexEqualityManager.java:449) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.constructWriteConstraints2(Elim1Store.java:975) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:314) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:764) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:725) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:643) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:335) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDistributivityAndPush(QuantifierPusher.java:409) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:354) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDistributivityAndPush(QuantifierPusher.java:409) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:354) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDistributivityAndPush(QuantifierPusher.java:409) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:354) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:254) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:348) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDistributivityAndPush(QuantifierPusher.java:409) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:354) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:254) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:348) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-20 21:46:19,067 INFO L158 Benchmark]: Toolchain (without parser) took 124814.54ms. Allocated memory was 75.5MB in the beginning and 119.5MB in the end (delta: 44.0MB). Free memory was 38.7MB in the beginning and 84.6MB in the end (delta: -45.9MB). Peak memory consumption was 61.3MB. Max. memory is 16.1GB. [2022-07-20 21:46:19,067 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 75.5MB. Free memory is still 54.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 21:46:19,068 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.96ms. Allocated memory is still 92.3MB. Free memory was 72.2MB in the beginning and 65.1MB in the end (delta: 7.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-20 21:46:19,068 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.80ms. Allocated memory is still 92.3MB. Free memory was 65.1MB in the beginning and 63.3MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 21:46:19,068 INFO L158 Benchmark]: Boogie Preprocessor took 32.52ms. Allocated memory is still 92.3MB. Free memory was 63.3MB in the beginning and 61.8MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-20 21:46:19,068 INFO L158 Benchmark]: RCFGBuilder took 406.08ms. Allocated memory is still 92.3MB. Free memory was 61.8MB in the beginning and 49.9MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-20 21:46:19,068 INFO L158 Benchmark]: TraceAbstraction took 124103.45ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 49.5MB in the beginning and 84.6MB in the end (delta: -35.1MB). Peak memory consumption was 57.5MB. Max. memory is 16.1GB. [2022-07-20 21:46:19,069 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 75.5MB. Free memory is still 54.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 201.96ms. Allocated memory is still 92.3MB. Free memory was 72.2MB in the beginning and 65.1MB in the end (delta: 7.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.80ms. Allocated memory is still 92.3MB. Free memory was 65.1MB in the beginning and 63.3MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 32.52ms. Allocated memory is still 92.3MB. Free memory was 63.3MB in the beginning and 61.8MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 406.08ms. Allocated memory is still 92.3MB. Free memory was 61.8MB in the beginning and 49.9MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 124103.45ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 49.5MB in the beginning and 84.6MB in the end (delta: -35.1MB). Peak memory consumption was 57.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ClassCastException: class de.uni_freiburg.informatik.ultimate.logic.ConstantTerm cannot be cast to class de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm (de.uni_freiburg.informatik.ultimate.logic.ConstantTerm and de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @17f9344b) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ClassCastException: class de.uni_freiburg.informatik.ultimate.logic.ConstantTerm cannot be cast to class de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm (de.uni_freiburg.informatik.ultimate.logic.ConstantTerm and de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @17f9344b): de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.MultiDimensionalSelect.(MultiDimensionalSelect.java:103) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-20 21:46:19,285 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-07-20 21:46:19,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/array17_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 1bbdbab39b20ef0f9bb51ea0fb71bf773586866898cf5babc34262381f9b9103 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:46:20,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:46:20,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:46:20,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:46:20,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:46:20,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:46:20,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:46:20,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:46:20,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:46:20,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:46:20,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:46:20,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:46:20,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:46:20,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:46:20,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:46:20,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:46:20,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:46:20,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:46:20,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:46:20,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:46:20,920 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:46:20,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:46:20,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:46:20,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:46:20,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:46:20,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:46:20,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:46:20,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:46:20,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:46:20,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:46:20,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:46:20,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:46:20,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:46:20,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:46:20,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:46:20,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:46:20,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:46:20,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:46:20,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:46:20,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:46:20,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:46:20,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:46:20,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-20 21:46:20,975 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:46:20,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:46:20,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:46:20,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:46:20,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:46:20,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:46:20,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:46:20,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:46:20,978 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:46:20,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:46:20,979 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:46:20,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:46:20,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:46:20,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:46:20,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:46:20,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:46:20,980 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 21:46:20,980 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 21:46:20,981 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 21:46:20,981 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:46:20,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:46:20,981 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:46:20,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:46:20,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:46:20,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:46:20,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:46:20,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:46:20,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:46:20,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:46:20,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:46:20,983 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 21:46:20,983 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 21:46:20,984 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:46:20,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:46:20,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:46:20,984 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 21:46:20,984 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bbdbab39b20ef0f9bb51ea0fb71bf773586866898cf5babc34262381f9b9103 [2022-07-20 21:46:21,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:46:21,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:46:21,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:46:21,318 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:46:21,319 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:46:21,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array17_pattern.c [2022-07-20 21:46:21,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36b01a0a9/d7d0fae85dce4030a4d7973fd061085a/FLAGe14167723 [2022-07-20 21:46:21,796 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:46:21,796 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array17_pattern.c [2022-07-20 21:46:21,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36b01a0a9/d7d0fae85dce4030a4d7973fd061085a/FLAGe14167723 [2022-07-20 21:46:21,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36b01a0a9/d7d0fae85dce4030a4d7973fd061085a [2022-07-20 21:46:21,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:46:21,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:46:21,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:46:21,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:46:21,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:46:21,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:46:21" (1/1) ... [2022-07-20 21:46:21,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55db268f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:21, skipping insertion in model container [2022-07-20 21:46:21,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:46:21" (1/1) ... [2022-07-20 21:46:21,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:46:21,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:46:22,019 WARN L230 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/array17_pattern.c[1441,1454] [2022-07-20 21:46:22,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:46:22,099 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:46:22,111 WARN L230 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/array17_pattern.c[1441,1454] [2022-07-20 21:46:22,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:46:22,145 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:46:22,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22 WrapperNode [2022-07-20 21:46:22,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:46:22,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:46:22,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:46:22,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:46:22,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22" (1/1) ... [2022-07-20 21:46:22,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22" (1/1) ... [2022-07-20 21:46:22,205 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-07-20 21:46:22,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:46:22,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:46:22,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:46:22,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:46:22,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22" (1/1) ... [2022-07-20 21:46:22,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22" (1/1) ... [2022-07-20 21:46:22,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22" (1/1) ... [2022-07-20 21:46:22,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22" (1/1) ... [2022-07-20 21:46:22,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22" (1/1) ... [2022-07-20 21:46:22,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22" (1/1) ... [2022-07-20 21:46:22,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22" (1/1) ... [2022-07-20 21:46:22,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:46:22,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:46:22,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:46:22,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:46:22,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22" (1/1) ... [2022-07-20 21:46:22,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:46:22,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:46:22,284 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) [2022-07-20 21:46:22,315 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 [2022-07-20 21:46:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:46:22,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-20 21:46:22,332 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-20 21:46:22,332 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-20 21:46:22,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:46:22,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-20 21:46:22,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:46:22,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:46:22,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:46:22,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-20 21:46:22,424 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:46:22,425 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:46:22,712 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:46:22,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:46:22,717 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-20 21:46:22,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:46:22 BoogieIcfgContainer [2022-07-20 21:46:22,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:46:22,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:46:22,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:46:22,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:46:22,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:46:21" (1/3) ... [2022-07-20 21:46:22,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2e5b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:46:22, skipping insertion in model container [2022-07-20 21:46:22,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:46:22" (2/3) ... [2022-07-20 21:46:22,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2e5b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:46:22, skipping insertion in model container [2022-07-20 21:46:22,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:46:22" (3/3) ... [2022-07-20 21:46:22,730 INFO L111 eAbstractionObserver]: Analyzing ICFG array17_pattern.c [2022-07-20 21:46:22,741 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:46:22,742 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:46:22,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:46:22,780 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1919b8b8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@130fefe4 [2022-07-20 21:46:22,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:46:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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) [2022-07-20 21:46:22,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 21:46:22,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:46:22,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:46:22,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:46:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:46:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2132324569, now seen corresponding path program 1 times [2022-07-20 21:46:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:46:22,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581348054] [2022-07-20 21:46:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:46:22,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:46:22,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:46:22,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:46:22,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 21:46:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:46:22,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-20 21:46:22,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:46:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:46:22,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:46:22,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:46:22,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581348054] [2022-07-20 21:46:22,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581348054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:46:22,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:46:22,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:46:22,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337949143] [2022-07-20 21:46:22,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:46:22,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:46:22,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:46:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:46:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:46:22,959 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 21:46:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:46:22,979 INFO L93 Difference]: Finished difference Result 63 states and 97 transitions. [2022-07-20 21:46:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:46:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-20 21:46:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:46:22,986 INFO L225 Difference]: With dead ends: 63 [2022-07-20 21:46:22,987 INFO L226 Difference]: Without dead ends: 29 [2022-07-20 21:46:22,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:46:22,995 INFO L413 NwaCegarLoop]: 41 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, 41 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 [2022-07-20 21:46:22,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:46:23,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-20 21:46:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-20 21:46:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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) [2022-07-20 21:46:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-07-20 21:46:23,033 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 15 [2022-07-20 21:46:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:46:23,034 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-07-20 21:46:23,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 21:46:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-07-20 21:46:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 21:46:23,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:46:23,036 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:46:23,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:46:23,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:46:23,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:46:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:46:23,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1872922357, now seen corresponding path program 1 times [2022-07-20 21:46:23,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:46:23,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391646865] [2022-07-20 21:46:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:46:23,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:46:23,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:46:23,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:46:23,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 21:46:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:46:23,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:46:23,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:46:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:46:23,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:46:23,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:46:23,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391646865] [2022-07-20 21:46:23,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391646865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:46:23,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:46:23,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:46:23,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464272075] [2022-07-20 21:46:23,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:46:23,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:46:23,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:46:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:46:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:46:23,433 INFO L87 Difference]: Start difference. First operand 29 states and 37 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:46:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:46:23,489 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-07-20 21:46:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:46:23,489 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-20 21:46:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:46:23,491 INFO L225 Difference]: With dead ends: 36 [2022-07-20 21:46:23,491 INFO L226 Difference]: Without dead ends: 32 [2022-07-20 21:46:23,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:46:23,492 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 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 [2022-07-20 21:46:23,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:46:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-20 21:46:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-20 21:46:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 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) [2022-07-20 21:46:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-20 21:46:23,499 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2022-07-20 21:46:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:46:23,500 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-20 21:46:23,500 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:46:23,500 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-20 21:46:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 21:46:23,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:46:23,501 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:46:23,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:46:23,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:46:23,702 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:46:23,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:46:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash 212512359, now seen corresponding path program 1 times [2022-07-20 21:46:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:46:23,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552041066] [2022-07-20 21:46:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:46:23,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:46:23,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:46:23,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:46:23,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 21:46:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:46:23,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:46:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:46:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:46:23,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:46:23,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:46:23,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552041066] [2022-07-20 21:46:23,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552041066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:46:23,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:46:23,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 21:46:23,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923343153] [2022-07-20 21:46:23,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:46:23,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 21:46:23,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:46:23,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 21:46:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:46:23,971 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-07-20 21:46:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:46:23,978 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2022-07-20 21:46:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:46:23,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 [2022-07-20 21:46:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:46:23,980 INFO L225 Difference]: With dead ends: 61 [2022-07-20 21:46:23,980 INFO L226 Difference]: Without dead ends: 37 [2022-07-20 21:46:23,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:46:23,981 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:46:23,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 104 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 67 Unchecked, 0.0s Time] [2022-07-20 21:46:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-20 21:46:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-20 21:46:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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) [2022-07-20 21:46:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-20 21:46:23,988 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 35 [2022-07-20 21:46:23,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:46:23,988 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-20 21:46:23,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-07-20 21:46:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-20 21:46:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 21:46:23,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:46:23,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:46:24,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:46:24,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:46:24,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:46:24,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:46:24,201 INFO L85 PathProgramCache]: Analyzing trace with hash -654332553, now seen corresponding path program 1 times [2022-07-20 21:46:24,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:46:24,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973932915] [2022-07-20 21:46:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:46:24,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:46:24,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:46:24,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:46:24,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 21:46:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:46:24,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:46:24,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:46:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:46:24,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:46:24,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:46:24,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973932915] [2022-07-20 21:46:24,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973932915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:46:24,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:46:24,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 21:46:24,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277406236] [2022-07-20 21:46:24,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:46:24,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 21:46:24,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:46:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 21:46:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:46:24,469 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-07-20 21:46:24,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:46:24,484 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-07-20 21:46:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:46:24,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 38 [2022-07-20 21:46:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:46:24,485 INFO L225 Difference]: With dead ends: 66 [2022-07-20 21:46:24,485 INFO L226 Difference]: Without dead ends: 38 [2022-07-20 21:46:24,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:46:24,496 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:46:24,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 100 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-07-20 21:46:24,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-20 21:46:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-20 21:46:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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) [2022-07-20 21:46:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-07-20 21:46:24,503 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2022-07-20 21:46:24,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:46:24,503 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-07-20 21:46:24,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-07-20 21:46:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-07-20 21:46:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 21:46:24,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:46:24,505 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:46:24,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-20 21:46:24,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:46:24,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:46:24,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:46:24,717 INFO L85 PathProgramCache]: Analyzing trace with hash 579061941, now seen corresponding path program 1 times [2022-07-20 21:46:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:46:24,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738741922] [2022-07-20 21:46:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:46:24,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:46:24,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:46:24,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:46:24,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 21:46:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:46:24,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:46:24,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:46:25,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-07-20 21:46:26,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:46:26,603 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:46:26,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 15 [2022-07-20 21:46:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:46:26,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:46:27,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-07-20 21:46:27,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 119 treesize of output 115 [2022-07-20 21:46:32,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:46:32,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738741922] [2022-07-20 21:46:32,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738741922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:46:32,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1203596170] [2022-07-20 21:46:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:46:32,630 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 21:46:32,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 21:46:32,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 21:46:32,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-07-20 21:46:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:46:32,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 21:46:32,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:46:34,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-07-20 21:46:47,451 INFO L356 Elim1Store]: treesize reduction 23, result has 11.5 percent of original size [2022-07-20 21:46:47,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 11 [2022-07-20 21:46:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:46:47,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:46:47,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-07-20 21:46:47,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 119 treesize of output 115 [2022-07-20 21:46:53,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1203596170] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:46:53,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:46:53,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 30 [2022-07-20 21:46:53,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405484247] [2022-07-20 21:46:53,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:46:53,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 21:46:53,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:46:53,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 21:46:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1271, Unknown=4, NotChecked=0, Total=1482 [2022-07-20 21:46:53,375 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 21:46:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:46:54,882 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2022-07-20 21:46:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:46:54,886 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2022-07-20 21:46:54,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:46:54,888 INFO L225 Difference]: With dead ends: 90 [2022-07-20 21:46:54,888 INFO L226 Difference]: Without dead ends: 64 [2022-07-20 21:46:54,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=307, Invalid=1759, Unknown=4, NotChecked=0, Total=2070 [2022-07-20 21:46:54,890 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:46:54,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 234 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 182 Unchecked, 0.3s Time] [2022-07-20 21:46:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-20 21:46:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-07-20 21:46:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:46:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2022-07-20 21:46:54,901 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 40 [2022-07-20 21:46:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:46:54,901 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2022-07-20 21:46:54,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 21:46:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2022-07-20 21:46:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:46:54,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:46:54,903 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 21:46:54,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:46:55,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:46:55,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:46:55,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:46:55,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:46:55,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1706965193, now seen corresponding path program 2 times [2022-07-20 21:46:55,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:46:55,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277145739] [2022-07-20 21:46:55,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:46:55,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:46:55,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:46:55,315 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:46:55,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 21:46:55,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:46:55,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:46:55,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 21:46:55,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:46:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:46:55,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:46:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 21:46:56,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:46:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277145739] [2022-07-20 21:46:56,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277145739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:46:56,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:46:56,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2022-07-20 21:46:56,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628923156] [2022-07-20 21:46:56,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:46:56,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 21:46:56,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:46:56,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 21:46:56,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:46:56,008 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:46:56,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:46:56,167 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2022-07-20 21:46:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 21:46:56,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-07-20 21:46:56,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:46:56,170 INFO L225 Difference]: With dead ends: 95 [2022-07-20 21:46:56,170 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 21:46:56,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:46:56,171 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:46:56,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 168 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-07-20 21:46:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 21:46:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2022-07-20 21:46:56,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.280701754385965) internal successors, (73), 57 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-20 21:46:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2022-07-20 21:46:56,192 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 42 [2022-07-20 21:46:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:46:56,193 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2022-07-20 21:46:56,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:46:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2022-07-20 21:46:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:46:56,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:46:56,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 21:46:56,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:46:56,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:46:56,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:46:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:46:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash 460196979, now seen corresponding path program 3 times [2022-07-20 21:46:56,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:46:56,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048449517] [2022-07-20 21:46:56,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:46:56,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:46:56,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:46:56,414 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:46:56,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 21:46:56,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:46:56,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:46:56,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 21:46:56,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:46:56,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-07-20 21:46:57,912 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:46:57,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 38 [2022-07-20 21:47:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 21:47:01,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:47:02,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-07-20 21:47:02,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 119 treesize of output 115 [2022-07-20 21:47:08,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:08,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048449517] [2022-07-20 21:47:08,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048449517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:47:08,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [398737044] [2022-07-20 21:47:08,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:47:08,240 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 21:47:08,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 21:47:08,241 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 21:47:08,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-07-20 21:47:08,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:47:08,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:47:08,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 21:47:08,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:09,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-07-20 21:47:23,318 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:47:23,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-07-20 21:47:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 21:47:26,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:47:26,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-07-20 21:47:26,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 119 treesize of output 115 [2022-07-20 21:47:31,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [398737044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:47:31,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:47:31,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2022-07-20 21:47:31,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695728701] [2022-07-20 21:47:31,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:47:31,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 21:47:31,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:31,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 21:47:31,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=823, Unknown=6, NotChecked=0, Total=992 [2022-07-20 21:47:31,492 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 21:47:31,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:31,649 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2022-07-20 21:47:31,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:47:31,650 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2022-07-20 21:47:31,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:31,651 INFO L225 Difference]: With dead ends: 112 [2022-07-20 21:47:31,651 INFO L226 Difference]: Without dead ends: 108 [2022-07-20 21:47:31,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=171, Invalid=879, Unknown=6, NotChecked=0, Total=1056 [2022-07-20 21:47:31,652 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:31,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 207 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 146 Unchecked, 0.0s Time] [2022-07-20 21:47:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-20 21:47:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 78. [2022-07-20 21:47:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-20 21:47:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2022-07-20 21:47:31,665 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 42 [2022-07-20 21:47:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:31,665 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2022-07-20 21:47:31,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 21:47:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2022-07-20 21:47:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:47:31,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:31,669 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 21:47:31,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:47:31,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:47:32,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 21:47:32,075 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:32,076 INFO L85 PathProgramCache]: Analyzing trace with hash -126609035, now seen corresponding path program 1 times [2022-07-20 21:47:32,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:32,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137545209] [2022-07-20 21:47:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:47:32,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:32,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:32,077 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:32,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 21:47:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:47:32,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:47:32,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 21:47:32,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:47:32,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:32,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137545209] [2022-07-20 21:47:32,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137545209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:47:32,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:47:32,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:47:32,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840709155] [2022-07-20 21:47:32,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:47:32,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:47:32,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:32,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:47:32,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:47:32,150 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:47:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:32,288 INFO L93 Difference]: Finished difference Result 136 states and 173 transitions. [2022-07-20 21:47:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:47:32,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-07-20 21:47:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:32,291 INFO L225 Difference]: With dead ends: 136 [2022-07-20 21:47:32,292 INFO L226 Difference]: Without dead ends: 104 [2022-07-20 21:47:32,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:47:32,293 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:32,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 61 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:47:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-20 21:47:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2022-07-20 21:47:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 68 states have internal predecessors, (86), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-20 21:47:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2022-07-20 21:47:32,307 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 42 [2022-07-20 21:47:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:32,307 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2022-07-20 21:47:32,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:47:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2022-07-20 21:47:32,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:47:32,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:32,309 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 21:47:32,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:47:32,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:47:32,516 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash -819666699, now seen corresponding path program 1 times [2022-07-20 21:47:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:32,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845352930] [2022-07-20 21:47:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:47:32,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:32,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:32,519 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:32,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-20 21:47:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:47:32,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:47:32,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 21:47:32,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:47:32,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:32,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845352930] [2022-07-20 21:47:32,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845352930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:47:32,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:47:32,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:47:32,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324057299] [2022-07-20 21:47:32,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:47:32,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:47:32,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:32,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:47:32,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:47:32,618 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:47:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:32,758 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2022-07-20 21:47:32,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:47:32,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-07-20 21:47:32,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:32,759 INFO L225 Difference]: With dead ends: 137 [2022-07-20 21:47:32,759 INFO L226 Difference]: Without dead ends: 103 [2022-07-20 21:47:32,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:47:32,760 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:32,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 75 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:47:32,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-20 21:47:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2022-07-20 21:47:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.25) internal successors, (85), 68 states have internal predecessors, (85), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-20 21:47:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2022-07-20 21:47:32,772 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 42 [2022-07-20 21:47:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:32,773 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2022-07-20 21:47:32,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:47:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2022-07-20 21:47:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:47:32,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:32,774 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 21:47:32,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:47:32,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:47:32,985 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1406472713, now seen corresponding path program 1 times [2022-07-20 21:47:32,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:32,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155547356] [2022-07-20 21:47:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:47:32,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:32,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:32,987 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:32,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 21:47:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:47:33,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:47:33,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:47:33,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:47:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 21:47:33,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:33,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155547356] [2022-07-20 21:47:33,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155547356] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:47:33,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:47:33,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-07-20 21:47:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954905490] [2022-07-20 21:47:33,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:47:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:47:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:47:33,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:47:33,795 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:47:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:34,610 INFO L93 Difference]: Finished difference Result 148 states and 187 transitions. [2022-07-20 21:47:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:47:34,614 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-07-20 21:47:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:34,614 INFO L225 Difference]: With dead ends: 148 [2022-07-20 21:47:34,615 INFO L226 Difference]: Without dead ends: 99 [2022-07-20 21:47:34,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:47:34,616 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:34,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 169 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 145 Invalid, 0 Unknown, 136 Unchecked, 0.5s Time] [2022-07-20 21:47:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-20 21:47:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2022-07-20 21:47:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 78 states have internal predecessors, (99), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-20 21:47:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2022-07-20 21:47:34,626 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 42 [2022-07-20 21:47:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:34,626 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2022-07-20 21:47:34,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:47:34,627 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2022-07-20 21:47:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 21:47:34,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:34,628 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:47:34,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:47:34,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:47:34,840 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1439159703, now seen corresponding path program 4 times [2022-07-20 21:47:34,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:34,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057349959] [2022-07-20 21:47:34,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:47:34,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:34,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:34,843 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:34,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-20 21:47:34,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:47:34,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:47:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 21:47:34,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 21:47:35,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:47:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 21:47:35,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:35,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057349959] [2022-07-20 21:47:35,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057349959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:47:35,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:47:35,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-07-20 21:47:35,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047391137] [2022-07-20 21:47:35,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:47:35,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 21:47:35,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:35,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 21:47:35,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:47:35,410 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 21:47:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:35,779 INFO L93 Difference]: Finished difference Result 141 states and 181 transitions. [2022-07-20 21:47:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:47:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2022-07-20 21:47:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:35,781 INFO L225 Difference]: With dead ends: 141 [2022-07-20 21:47:35,781 INFO L226 Difference]: Without dead ends: 130 [2022-07-20 21:47:35,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:47:35,782 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:35,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 120 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 65 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-07-20 21:47:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-20 21:47:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2022-07-20 21:47:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 103 states have (on average 1.2718446601941749) internal successors, (131), 103 states have internal predecessors, (131), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 21:47:35,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 153 transitions. [2022-07-20 21:47:35,795 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 153 transitions. Word has length 43 [2022-07-20 21:47:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:35,795 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 153 transitions. [2022-07-20 21:47:35,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 21:47:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 153 transitions. [2022-07-20 21:47:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 21:47:35,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:35,797 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:47:35,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:47:36,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:47:36,007 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:36,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:36,008 INFO L85 PathProgramCache]: Analyzing trace with hash -625008091, now seen corresponding path program 5 times [2022-07-20 21:47:36,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:36,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024306334] [2022-07-20 21:47:36,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:47:36,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:36,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:36,010 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:36,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 21:47:36,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 21:47:36,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:47:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:47:36,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:47:36,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:47:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 21:47:36,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:36,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024306334] [2022-07-20 21:47:36,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024306334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:47:36,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:47:36,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-20 21:47:36,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882573543] [2022-07-20 21:47:36,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:47:36,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 21:47:36,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 21:47:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:47:36,344 INFO L87 Difference]: Start difference. First operand 119 states and 153 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 21:47:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:36,862 INFO L93 Difference]: Finished difference Result 268 states and 351 transitions. [2022-07-20 21:47:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:47:36,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2022-07-20 21:47:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:36,864 INFO L225 Difference]: With dead ends: 268 [2022-07-20 21:47:36,864 INFO L226 Difference]: Without dead ends: 188 [2022-07-20 21:47:36,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:47:36,865 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 168 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:36,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 112 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 21:47:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-20 21:47:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 139. [2022-07-20 21:47:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 121 states have (on average 1.2066115702479339) internal successors, (146), 121 states have internal predecessors, (146), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 21:47:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 168 transitions. [2022-07-20 21:47:36,884 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 168 transitions. Word has length 43 [2022-07-20 21:47:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:36,884 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 168 transitions. [2022-07-20 21:47:36,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 21:47:36,885 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 168 transitions. [2022-07-20 21:47:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 21:47:36,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:36,885 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:47:36,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-20 21:47:37,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:47:37,091 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash 822903975, now seen corresponding path program 6 times [2022-07-20 21:47:37,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:37,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004514307] [2022-07-20 21:47:37,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:47:37,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:37,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:37,094 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:37,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-20 21:47:37,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-20 21:47:37,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:47:37,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 21:47:37,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:47:37,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:47:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:47:37,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:37,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004514307] [2022-07-20 21:47:37,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004514307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:47:37,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:47:37,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-07-20 21:47:37,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640146808] [2022-07-20 21:47:37,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:47:37,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 21:47:37,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 21:47:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:47:37,663 INFO L87 Difference]: Start difference. First operand 139 states and 168 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:47:38,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:38,008 INFO L93 Difference]: Finished difference Result 199 states and 237 transitions. [2022-07-20 21:47:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:47:38,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2022-07-20 21:47:38,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:38,010 INFO L225 Difference]: With dead ends: 199 [2022-07-20 21:47:38,010 INFO L226 Difference]: Without dead ends: 166 [2022-07-20 21:47:38,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:47:38,010 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:38,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 148 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-07-20 21:47:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-20 21:47:38,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2022-07-20 21:47:38,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 141 states have internal predecessors, (167), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 21:47:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 193 transitions. [2022-07-20 21:47:38,026 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 193 transitions. Word has length 45 [2022-07-20 21:47:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:38,027 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 193 transitions. [2022-07-20 21:47:38,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:47:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 193 transitions. [2022-07-20 21:47:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 21:47:38,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:38,028 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:47:38,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-20 21:47:38,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:47:38,235 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash -496880723, now seen corresponding path program 2 times [2022-07-20 21:47:38,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:38,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122592235] [2022-07-20 21:47:38,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:47:38,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:38,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:38,237 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:38,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-20 21:47:38,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:47:38,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:47:38,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 21:47:38,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 21:47:38,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:47:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 21:47:38,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:38,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122592235] [2022-07-20 21:47:38,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122592235] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:47:38,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:47:38,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2022-07-20 21:47:38,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904944981] [2022-07-20 21:47:38,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:47:38,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 21:47:38,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:38,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 21:47:38,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:47:38,943 INFO L87 Difference]: Start difference. First operand 162 states and 193 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 21:47:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:39,094 INFO L93 Difference]: Finished difference Result 166 states and 196 transitions. [2022-07-20 21:47:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 21:47:39,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 47 [2022-07-20 21:47:39,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:39,096 INFO L225 Difference]: With dead ends: 166 [2022-07-20 21:47:39,096 INFO L226 Difference]: Without dead ends: 155 [2022-07-20 21:47:39,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:47:39,097 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:39,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 110 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 57 Unchecked, 0.0s Time] [2022-07-20 21:47:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-20 21:47:39,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 126. [2022-07-20 21:47:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 111 states have internal predecessors, (131), 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) [2022-07-20 21:47:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-07-20 21:47:39,116 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 47 [2022-07-20 21:47:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:39,117 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-07-20 21:47:39,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 21:47:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-07-20 21:47:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 21:47:39,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:39,118 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 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, 1, 1, 1, 1, 1] [2022-07-20 21:47:39,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-20 21:47:39,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:47:39,327 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1006182803, now seen corresponding path program 7 times [2022-07-20 21:47:39,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:39,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731358736] [2022-07-20 21:47:39,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:47:39,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:39,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:39,330 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:39,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-20 21:47:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:47:39,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 21:47:39,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-20 21:47:39,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:47:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-20 21:47:40,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:40,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731358736] [2022-07-20 21:47:40,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731358736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:47:40,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:47:40,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2022-07-20 21:47:40,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859873056] [2022-07-20 21:47:40,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:47:40,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:47:40,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:40,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:47:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:47:40,598 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:47:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:45,552 INFO L93 Difference]: Finished difference Result 225 states and 275 transitions. [2022-07-20 21:47:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-20 21:47:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2022-07-20 21:47:45,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:45,553 INFO L225 Difference]: With dead ends: 225 [2022-07-20 21:47:45,553 INFO L226 Difference]: Without dead ends: 162 [2022-07-20 21:47:45,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=730, Invalid=2350, Unknown=0, NotChecked=0, Total=3080 [2022-07-20 21:47:45,555 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:45,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 191 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 220 Invalid, 0 Unknown, 181 Unchecked, 1.1s Time] [2022-07-20 21:47:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-20 21:47:45,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2022-07-20 21:47:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 134 states have (on average 1.2238805970149254) internal successors, (164), 134 states have internal predecessors, (164), 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) [2022-07-20 21:47:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 182 transitions. [2022-07-20 21:47:45,575 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 182 transitions. Word has length 55 [2022-07-20 21:47:45,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:45,575 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 182 transitions. [2022-07-20 21:47:45,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:47:45,576 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 182 transitions. [2022-07-20 21:47:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 21:47:45,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:45,577 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:47:45,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-20 21:47:45,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:47:45,780 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1397306637, now seen corresponding path program 8 times [2022-07-20 21:47:45,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:45,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632791088] [2022-07-20 21:47:45,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:47:45,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:45,782 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:45,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-20 21:47:45,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:47:45,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:47:45,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:47:45,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 21:47:46,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:47:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 21:47:46,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:46,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632791088] [2022-07-20 21:47:46,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632791088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:47:46,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:47:46,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2022-07-20 21:47:46,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503792547] [2022-07-20 21:47:46,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:47:46,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 21:47:46,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:46,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 21:47:46,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:47:46,752 INFO L87 Difference]: Start difference. First operand 149 states and 182 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 21:47:47,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:47,379 INFO L93 Difference]: Finished difference Result 178 states and 216 transitions. [2022-07-20 21:47:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:47:47,380 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 56 [2022-07-20 21:47:47,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:47,380 INFO L225 Difference]: With dead ends: 178 [2022-07-20 21:47:47,380 INFO L226 Difference]: Without dead ends: 169 [2022-07-20 21:47:47,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2022-07-20 21:47:47,381 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 64 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:47,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 290 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2022-07-20 21:47:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-20 21:47:47,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2022-07-20 21:47:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 148 states have (on average 1.2297297297297298) internal successors, (182), 148 states have internal predecessors, (182), 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) [2022-07-20 21:47:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 200 transitions. [2022-07-20 21:47:47,397 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 200 transitions. Word has length 56 [2022-07-20 21:47:47,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:47,397 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 200 transitions. [2022-07-20 21:47:47,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 21:47:47,398 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 200 transitions. [2022-07-20 21:47:47,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 21:47:47,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:47,398 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:47:47,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-20 21:47:47,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:47:47,610 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:47,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1996100369, now seen corresponding path program 3 times [2022-07-20 21:47:47,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:47,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394444602] [2022-07-20 21:47:47,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:47:47,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:47,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:47,612 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:47,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-20 21:47:47,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 21:47:47,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:47:47,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 21:47:47,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-20 21:47:48,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:47:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-20 21:47:48,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:48,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394444602] [2022-07-20 21:47:48,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394444602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:47:48,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:47:48,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-07-20 21:47:48,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438412188] [2022-07-20 21:47:48,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:47:48,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 21:47:48,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:48,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 21:47:48,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-07-20 21:47:48,517 INFO L87 Difference]: Start difference. First operand 163 states and 200 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:47:48,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:48,935 INFO L93 Difference]: Finished difference Result 202 states and 244 transitions. [2022-07-20 21:47:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 21:47:48,936 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2022-07-20 21:47:48,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:48,937 INFO L225 Difference]: With dead ends: 202 [2022-07-20 21:47:48,937 INFO L226 Difference]: Without dead ends: 193 [2022-07-20 21:47:48,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:47:48,938 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:48,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 170 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 65 Unchecked, 0.0s Time] [2022-07-20 21:47:48,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-20 21:47:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 158. [2022-07-20 21:47:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 143 states have (on average 1.2237762237762237) internal successors, (175), 143 states have internal predecessors, (175), 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) [2022-07-20 21:47:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 193 transitions. [2022-07-20 21:47:48,958 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 193 transitions. Word has length 56 [2022-07-20 21:47:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:48,958 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 193 transitions. [2022-07-20 21:47:48,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:47:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 193 transitions. [2022-07-20 21:47:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 21:47:48,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:48,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2022-07-20 21:47:48,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-20 21:47:49,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:47:49,168 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:49,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1599830803, now seen corresponding path program 4 times [2022-07-20 21:47:49,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:49,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616733669] [2022-07-20 21:47:49,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:47:49,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:49,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:49,170 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:49,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-20 21:47:49,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:47:49,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:47:49,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:47:49,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 21:47:49,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:47:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 21:47:49,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:47:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616733669] [2022-07-20 21:47:49,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616733669] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:47:49,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:47:49,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-07-20 21:47:49,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144138466] [2022-07-20 21:47:49,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:47:49,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:47:49,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:47:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:47:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:47:49,792 INFO L87 Difference]: Start difference. First operand 158 states and 193 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:47:50,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:47:50,676 INFO L93 Difference]: Finished difference Result 296 states and 360 transitions. [2022-07-20 21:47:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 21:47:50,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2022-07-20 21:47:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:47:50,680 INFO L225 Difference]: With dead ends: 296 [2022-07-20 21:47:50,680 INFO L226 Difference]: Without dead ends: 244 [2022-07-20 21:47:50,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:47:50,681 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 85 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:47:50,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 247 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 110 Invalid, 0 Unknown, 207 Unchecked, 0.5s Time] [2022-07-20 21:47:50,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-20 21:47:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 222. [2022-07-20 21:47:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 201 states have (on average 1.228855721393035) internal successors, (247), 202 states have internal predecessors, (247), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 21:47:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 275 transitions. [2022-07-20 21:47:50,710 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 275 transitions. Word has length 57 [2022-07-20 21:47:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:47:50,710 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 275 transitions. [2022-07-20 21:47:50,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:47:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 275 transitions. [2022-07-20 21:47:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 21:47:50,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:47:50,711 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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, 1, 1] [2022-07-20 21:47:50,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-20 21:47:50,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:47:50,923 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:47:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:47:50,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1673343477, now seen corresponding path program 9 times [2022-07-20 21:47:50,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:47:50,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207106059] [2022-07-20 21:47:50,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:47:50,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:47:50,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:47:50,925 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:47:50,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-20 21:47:51,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-20 21:47:51,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:47:51,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-20 21:47:51,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:47:51,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-07-20 21:47:51,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:51,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 33 [2022-07-20 21:47:52,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:52,113 INFO L356 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2022-07-20 21:47:52,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 38 treesize of output 40 [2022-07-20 21:47:52,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:52,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:52,507 INFO L356 Elim1Store]: treesize reduction 106, result has 13.8 percent of original size [2022-07-20 21:47:52,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 57 [2022-07-20 21:47:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:54,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:54,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:54,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:54,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:54,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:54,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:54,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:54,348 INFO L356 Elim1Store]: treesize reduction 63, result has 47.1 percent of original size [2022-07-20 21:47:54,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 108 [2022-07-20 21:47:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:55,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:55,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:55,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:55,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:55,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:55,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:47:55,805 INFO L356 Elim1Store]: treesize reduction 126, result has 34.7 percent of original size [2022-07-20 21:47:55,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 125 treesize of output 181