./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ms2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ms2.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 125fe310e2ae1e5a109eb21d52d95bf156448ac6c5b2e6793bd0b6f80e48ce1d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:08:50,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:08:50,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:08:50,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:08:50,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:08:50,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:08:50,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:08:50,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:08:50,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:08:50,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:08:50,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:08:50,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:08:50,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:08:50,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:08:50,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:08:50,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:08:50,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:08:50,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:08:50,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:08:50,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:08:50,842 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:08:50,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:08:50,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:08:50,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:08:50,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:08:50,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:08:50,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:08:50,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:08:50,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:08:50,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:08:50,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:08:50,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:08:50,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:08:50,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:08:50,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:08:50,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:08:50,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:08:50,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:08:50,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:08:50,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:08:50,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:08:50,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:08:50,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:08:50,880 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:08:50,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:08:50,880 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:08:50,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:08:50,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:08:50,881 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:08:50,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:08:50,882 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:08:50,882 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:08:50,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:08:50,882 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:08:50,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:08:50,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:08:50,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:08:50,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:08:50,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:08:50,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:08:50,883 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:08:50,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:08:50,883 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:08:50,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:08:50,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:08:50,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:08:50,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:08:50,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:08:50,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:08:50,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:08:50,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:08:50,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:08:50,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:08:50,885 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:08:50,885 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:08:50,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:08:50,885 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 125fe310e2ae1e5a109eb21d52d95bf156448ac6c5b2e6793bd0b6f80e48ce1d [2022-07-13 11:08:51,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:08:51,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:08:51,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:08:51,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:08:51,140 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:08:51,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ms2.c [2022-07-13 11:08:51,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8a4c8bd5/f8a5d60083af4682a7b0326e55973603/FLAGda6b68c9c [2022-07-13 11:08:51,604 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:08:51,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms2.c [2022-07-13 11:08:51,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8a4c8bd5/f8a5d60083af4682a7b0326e55973603/FLAGda6b68c9c [2022-07-13 11:08:52,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8a4c8bd5/f8a5d60083af4682a7b0326e55973603 [2022-07-13 11:08:52,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:08:52,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:08:52,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:08:52,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:08:52,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:08:52,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a990ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52, skipping insertion in model container [2022-07-13 11:08:52,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:08:52,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:08:52,209 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-fpi/ms2.c[586,599] [2022-07-13 11:08:52,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:08:52,233 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:08:52,244 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-fpi/ms2.c[586,599] [2022-07-13 11:08:52,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:08:52,261 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:08:52,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52 WrapperNode [2022-07-13 11:08:52,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:08:52,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:08:52,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:08:52,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:08:52,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,290 INFO L137 Inliner]: procedures = 17, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2022-07-13 11:08:52,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:08:52,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:08:52,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:08:52,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:08:52,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:08:52,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:08:52,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:08:52,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:08:52,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52" (1/1) ... [2022-07-13 11:08:52,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:08:52,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:08:52,344 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) [2022-07-13 11:08:52,349 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 [2022-07-13 11:08:52,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:08:52,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:08:52,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 11:08:52,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 11:08:52,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:08:52,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:08:52,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:08:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 11:08:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 11:08:52,442 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:08:52,443 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:08:52,540 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:08:52,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:08:52,546 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 11:08:52,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:08:52 BoogieIcfgContainer [2022-07-13 11:08:52,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:08:52,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:08:52,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:08:52,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:08:52,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:08:52" (1/3) ... [2022-07-13 11:08:52,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc065c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:08:52, skipping insertion in model container [2022-07-13 11:08:52,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:08:52" (2/3) ... [2022-07-13 11:08:52,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc065c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:08:52, skipping insertion in model container [2022-07-13 11:08:52,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:08:52" (3/3) ... [2022-07-13 11:08:52,562 INFO L111 eAbstractionObserver]: Analyzing ICFG ms2.c [2022-07-13 11:08:52,575 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:08:52,575 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:08:52,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:08:52,622 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@10882198, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@358ea330 [2022-07-13 11:08:52,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:08:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 11:08:52,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:08:52,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:08:52,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:08:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:08:52,637 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2022-07-13 11:08:52,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:08:52,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073286729] [2022-07-13 11:08:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:08:52,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:08:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:08:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:08:52,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:08:52,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073286729] [2022-07-13 11:08:52,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073286729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:08:52,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:08:52,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:08:52,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216957576] [2022-07-13 11:08:52,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:08:52,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 11:08:52,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:08:52,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 11:08:52,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:08:52,858 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:52,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:08:52,873 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-07-13 11:08:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 11:08:52,876 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 11:08:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:08:52,882 INFO L225 Difference]: With dead ends: 34 [2022-07-13 11:08:52,883 INFO L226 Difference]: Without dead ends: 15 [2022-07-13 11:08:52,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:08:52,893 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2022-07-13 11:08:52,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:08:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-13 11:08:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-13 11:08:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-13 11:08:52,927 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-07-13 11:08:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:08:52,928 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-13 11:08:52,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-13 11:08:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 11:08:52,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:08:52,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:08:52,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:08:52,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:08:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:08:52,933 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2022-07-13 11:08:52,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:08:52,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214739414] [2022-07-13 11:08:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:08:52,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:08:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:08:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:08:53,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:08:53,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214739414] [2022-07-13 11:08:53,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214739414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:08:53,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:08:53,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:08:53,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881395630] [2022-07-13 11:08:53,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:08:53,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:08:53,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:08:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:08:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:08:53,065 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:08:53,120 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-07-13 11:08:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:08:53,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 11:08:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:08:53,122 INFO L225 Difference]: With dead ends: 28 [2022-07-13 11:08:53,122 INFO L226 Difference]: Without dead ends: 20 [2022-07-13 11:08:53,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:08:53,123 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:08:53,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 11 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:08:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-13 11:08:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-07-13 11:08:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-07-13 11:08:53,129 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2022-07-13 11:08:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:08:53,129 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-07-13 11:08:53,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-07-13 11:08:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 11:08:53,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:08:53,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:08:53,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:08:53,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:08:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:08:53,132 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2022-07-13 11:08:53,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:08:53,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936343183] [2022-07-13 11:08:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:08:53,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:08:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:08:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:08:53,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:08:53,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936343183] [2022-07-13 11:08:53,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936343183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:08:53,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:08:53,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:08:53,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893581644] [2022-07-13 11:08:53,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:08:53,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:08:53,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:08:53,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:08:53,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:08:53,205 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:08:53,242 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-13 11:08:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:08:53,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-13 11:08:53,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:08:53,244 INFO L225 Difference]: With dead ends: 25 [2022-07-13 11:08:53,244 INFO L226 Difference]: Without dead ends: 21 [2022-07-13 11:08:53,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:08:53,245 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:08:53,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 25 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:08:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-13 11:08:53,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-07-13 11:08:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-13 11:08:53,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2022-07-13 11:08:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:08:53,251 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-13 11:08:53,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-13 11:08:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 11:08:53,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:08:53,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:08:53,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:08:53,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:08:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:08:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash -422196611, now seen corresponding path program 1 times [2022-07-13 11:08:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:08:53,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855117179] [2022-07-13 11:08:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:08:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:08:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:08:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:08:53,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:08:53,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855117179] [2022-07-13 11:08:53,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855117179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:08:53,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300342559] [2022-07-13 11:08:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:08:53,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:08:53,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:08:53,351 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) [2022-07-13 11:08:53,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:08:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:08:53,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 11:08:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:08:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:08:53,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:08:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:08:53,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300342559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:08:53,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:08:53,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-13 11:08:53,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060443599] [2022-07-13 11:08:53,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:08:53,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:08:53,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:08:53,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:08:53,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:08:53,566 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:08:53,667 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-13 11:08:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:08:53,668 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-13 11:08:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:08:53,669 INFO L225 Difference]: With dead ends: 39 [2022-07-13 11:08:53,670 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 11:08:53,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:08:53,672 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:08:53,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:08:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 11:08:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-07-13 11:08:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:53,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-13 11:08:53,685 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-07-13 11:08:53,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:08:53,686 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-13 11:08:53,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-13 11:08:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 11:08:53,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:08:53,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:08:53,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 11:08:53,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:08:53,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:08:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:08:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 2 times [2022-07-13 11:08:53,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:08:53,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275981466] [2022-07-13 11:08:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:08:53,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:08:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:08:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:08:54,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:08:54,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275981466] [2022-07-13 11:08:54,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275981466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:08:54,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008146430] [2022-07-13 11:08:54,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:08:54,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:08:54,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:08:54,341 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) [2022-07-13 11:08:54,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:08:54,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:08:54,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:08:54,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:08:54,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:08:54,540 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 18 treesize of output 14 [2022-07-13 11:08:54,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:08:54,793 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 26 treesize of output 25 [2022-07-13 11:08:55,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:08:55,586 INFO L356 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-07-13 11:08:55,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2022-07-13 11:08:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:08:57,943 INFO L356 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-07-13 11:08:57,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2022-07-13 11:08:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:08:58,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:08:59,294 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 106 treesize of output 98 [2022-07-13 11:08:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:08:59,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008146430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:08:59,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:08:59,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-07-13 11:08:59,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223773452] [2022-07-13 11:08:59,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:08:59,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 11:08:59,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:08:59,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 11:08:59,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=882, Unknown=2, NotChecked=0, Total=1056 [2022-07-13 11:08:59,448 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:08:59,911 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-13 11:08:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 11:08:59,912 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-13 11:08:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:08:59,912 INFO L225 Difference]: With dead ends: 39 [2022-07-13 11:08:59,912 INFO L226 Difference]: Without dead ends: 35 [2022-07-13 11:08:59,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=306, Invalid=1498, Unknown=2, NotChecked=0, Total=1806 [2022-07-13 11:08:59,914 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:08:59,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 58 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-07-13 11:08:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-13 11:08:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-07-13 11:08:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-13 11:08:59,920 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-07-13 11:08:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:08:59,920 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-13 11:08:59,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:08:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-13 11:08:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 11:08:59,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:08:59,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:08:59,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:09:00,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:00,148 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:09:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:09:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash -981578845, now seen corresponding path program 3 times [2022-07-13 11:09:00,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:09:00,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759314175] [2022-07-13 11:09:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:00,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:09:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:09:00,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:09:00,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759314175] [2022-07-13 11:09:00,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759314175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:09:00,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462038254] [2022-07-13 11:09:00,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:09:00,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:00,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:09:00,204 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) [2022-07-13 11:09:00,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:09:00,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 11:09:00,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:09:00,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:09:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:09:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:00,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:09:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:00,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462038254] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:09:00,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:09:00,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 14 [2022-07-13 11:09:00,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827972154] [2022-07-13 11:09:00,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:09:00,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:09:00,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:09:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:09:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:09:00,393 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:09:00,538 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-07-13 11:09:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:09:00,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-13 11:09:00,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:09:00,539 INFO L225 Difference]: With dead ends: 47 [2022-07-13 11:09:00,539 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 11:09:00,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-07-13 11:09:00,540 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:09:00,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 26 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:09:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 11:09:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-07-13 11:09:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-07-13 11:09:00,545 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2022-07-13 11:09:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:09:00,545 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-07-13 11:09:00,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-07-13 11:09:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 11:09:00,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:09:00,546 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:09:00,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:09:00,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:00,747 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:09:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:09:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1384678109, now seen corresponding path program 4 times [2022-07-13 11:09:00,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:09:00,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166216617] [2022-07-13 11:09:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:00,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:09:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:01,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:09:01,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166216617] [2022-07-13 11:09:01,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166216617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:09:01,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336238555] [2022-07-13 11:09:01,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:09:01,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:01,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:09:01,252 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) [2022-07-13 11:09:01,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:09:01,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:09:01,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:09:01,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 11:09:01,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:09:01,358 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 15 treesize of output 11 [2022-07-13 11:09:01,435 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 11:09:01,436 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 23 treesize of output 22 [2022-07-13 11:09:01,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:01,564 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:09:01,564 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 1 case distinctions, treesize of input 30 treesize of output 32 [2022-07-13 11:09:01,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:01,676 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-07-13 11:09:01,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 51 [2022-07-13 11:09:01,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:01,804 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:09:01,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-07-13 11:09:01,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:01,916 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:09:01,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 15 [2022-07-13 11:09:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:01,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:09:25,184 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:09:25,185 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 914 treesize of output 890 [2022-07-13 11:09:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:26,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336238555] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:09:26,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:09:26,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2022-07-13 11:09:26,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211207321] [2022-07-13 11:09:26,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:09:26,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-13 11:09:26,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:09:26,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-13 11:09:26,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1365, Unknown=11, NotChecked=0, Total=1560 [2022-07-13 11:09:26,011 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:26,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:09:26,943 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-07-13 11:09:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 11:09:26,944 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 11:09:26,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:09:26,944 INFO L225 Difference]: With dead ends: 36 [2022-07-13 11:09:26,944 INFO L226 Difference]: Without dead ends: 32 [2022-07-13 11:09:26,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=379, Invalid=2472, Unknown=11, NotChecked=0, Total=2862 [2022-07-13 11:09:26,946 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:09:26,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 103 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 292 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-07-13 11:09:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-13 11:09:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-07-13 11:09:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-07-13 11:09:26,952 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2022-07-13 11:09:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:09:26,952 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-07-13 11:09:26,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-07-13 11:09:26,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 11:09:26,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:09:26,953 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:09:26,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:09:27,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:27,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:09:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:09:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash -483356095, now seen corresponding path program 5 times [2022-07-13 11:09:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:09:27,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460809004] [2022-07-13 11:09:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:27,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:09:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:27,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:09:27,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460809004] [2022-07-13 11:09:27,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460809004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:09:27,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409943618] [2022-07-13 11:09:27,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 11:09:27,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:27,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:09:27,258 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) [2022-07-13 11:09:27,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 11:09:27,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-13 11:09:27,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:09:27,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:09:27,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:09:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:27,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:09:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:27,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409943618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:09:27,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:09:27,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-13 11:09:27,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826065923] [2022-07-13 11:09:27,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:09:27,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 11:09:27,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:09:27,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 11:09:27,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:09:27,485 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:09:27,623 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2022-07-13 11:09:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:09:27,624 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-13 11:09:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:09:27,624 INFO L225 Difference]: With dead ends: 53 [2022-07-13 11:09:27,624 INFO L226 Difference]: Without dead ends: 35 [2022-07-13 11:09:27,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-13 11:09:27,625 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:09:27,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 37 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:09:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-13 11:09:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-07-13 11:09:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-07-13 11:09:27,631 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2022-07-13 11:09:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:09:27,632 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-07-13 11:09:27,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:27,632 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-07-13 11:09:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 11:09:27,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:09:27,633 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:09:27,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:09:27,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:27,844 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:09:27,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:09:27,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1023492733, now seen corresponding path program 6 times [2022-07-13 11:09:27,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:09:27,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441637094] [2022-07-13 11:09:27,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:27,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:09:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:28,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:09:28,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441637094] [2022-07-13 11:09:28,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441637094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:09:28,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394229591] [2022-07-13 11:09:28,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 11:09:28,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:28,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:09:28,511 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) [2022-07-13 11:09:28,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 11:09:28,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-13 11:09:28,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:09:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 11:09:28,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:09:28,595 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 10 treesize of output 8 [2022-07-13 11:09:28,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 11:09:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:28,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 11:09:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:28,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:28,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:28,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2022-07-13 11:09:29,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:29,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:29,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:29,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2022-07-13 11:09:29,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:09:29,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:29,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:29,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:29,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 87 [2022-07-13 11:09:29,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:29,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:29,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:29,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:09:29,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:29,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 85 [2022-07-13 11:09:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:30,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:30,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:09:30,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:30,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 83 [2022-07-13 11:09:30,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:30,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:30,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:30,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 34 [2022-07-13 11:09:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:30,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:09:55,307 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-13 11:09:55,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 6488 treesize of output 6404 [2022-07-13 11:09:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:57,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394229591] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:09:57,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:09:57,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 21] total 55 [2022-07-13 11:09:57,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797025423] [2022-07-13 11:09:57,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:09:57,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-13 11:09:57,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:09:57,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-13 11:09:57,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=2486, Unknown=9, NotChecked=0, Total=2970 [2022-07-13 11:09:57,663 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:30,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:30,033 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-07-13 11:10:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 11:10:30,033 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-13 11:10:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:30,034 INFO L225 Difference]: With dead ends: 74 [2022-07-13 11:10:30,034 INFO L226 Difference]: Without dead ends: 69 [2022-07-13 11:10:30,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=936, Invalid=4596, Unknown=18, NotChecked=0, Total=5550 [2022-07-13 11:10:30,036 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:10:30,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 95 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 190 Unchecked, 0.1s Time] [2022-07-13 11:10:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-13 11:10:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2022-07-13 11:10:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-07-13 11:10:30,047 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 31 [2022-07-13 11:10:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:30,047 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-07-13 11:10:30,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-07-13 11:10:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 11:10:30,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:30,048 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:30,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:10:30,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:30,252 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash -880704545, now seen corresponding path program 7 times [2022-07-13 11:10:30,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:30,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011775379] [2022-07-13 11:10:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:30,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:31,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011775379] [2022-07-13 11:10:31,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011775379] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:10:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735195575] [2022-07-13 11:10:31,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 11:10:31,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:31,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:31,462 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) [2022-07-13 11:10:31,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 11:10:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:31,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-13 11:10:31,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:31,531 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 10 treesize of output 8 [2022-07-13 11:10:31,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 11:10:31,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-07-13 11:10:31,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 48 [2022-07-13 11:10:31,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 58 [2022-07-13 11:10:32,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 68 [2022-07-13 11:10:32,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:32,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 75 [2022-07-13 11:10:32,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:32,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 72 [2022-07-13 11:10:32,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-07-13 11:10:33,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:33,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:33,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:33,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:33,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:33,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:33,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 67 [2022-07-13 11:10:33,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:33,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:33,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:33,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:33,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:33,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 23 [2022-07-13 11:10:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:33,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:10:47,853 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_302 Int) (v_ArrVal_301 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_308 Int) (v_ArrVal_306 Int) (v_ArrVal_304 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_301)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (<= (+ v_ArrVal_308 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_308)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (let ((.cse2 (mod |c_ULTIMATE.start_main_~i~0#1| 2))) (and (or (not (<= v_ArrVal_301 .cse2)) (and (< |c_ULTIMATE.start_main_~i~0#1| 0) (not (= .cse2 0)))) (< .cse2 (+ v_ArrVal_301 2)))) (not (<= v_ArrVal_306 (+ v_ArrVal_304 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_304)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= v_ArrVal_308 (+ v_ArrVal_306 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_306)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= v_ArrVal_304 (+ v_ArrVal_302 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_302)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_302 0)))))) is different from false [2022-07-13 11:11:30,353 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_302 Int) (v_ArrVal_301 Int) (v_ArrVal_298 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_308 Int) (v_ArrVal_306 Int) (v_ArrVal_304 Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_298) (+ .cse5 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_301))))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (let ((.cse0 (mod |c_ULTIMATE.start_main_~i~0#1| 2))) (and (or (not (<= v_ArrVal_301 .cse0)) (and (not (= .cse0 0)) (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 0))) (< .cse0 (+ v_ArrVal_301 2)))) (not (<= v_ArrVal_304 (+ v_ArrVal_302 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_302)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (let ((.cse3 (mod .cse4 2))) (and (< .cse3 (+ v_ArrVal_298 2)) (or (and (< .cse4 0) (not (= .cse3 0))) (not (<= v_ArrVal_298 .cse3)))))) (not (<= v_ArrVal_308 (+ v_ArrVal_306 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_306)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (<= (+ v_ArrVal_308 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_308)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ 3 |c_ULTIMATE.start_main_~i~0#1|)) (not (<= v_ArrVal_302 0)) (not (<= v_ArrVal_306 (+ v_ArrVal_304 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_304)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))))))) is different from false [2022-07-13 11:11:38,734 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_302 Int) (v_ArrVal_301 Int) (v_ArrVal_298 Int) (v_ArrVal_296 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_308 Int) (v_ArrVal_306 Int) (v_ArrVal_304 Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_296) (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_298) (+ .cse6 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_301)))) (.cse1 (mod |c_ULTIMATE.start_main_~i~0#1| 2))) (let ((.cse0 (not (= .cse1 0))) (.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (and (or (and (< |c_ULTIMATE.start_main_~i~0#1| 0) .cse0) (not (<= v_ArrVal_296 .cse1))) (< .cse1 (+ v_ArrVal_296 2))) (and (or (not (<= v_ArrVal_301 .cse1)) (and .cse0 (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 0))) (< .cse1 (+ v_ArrVal_301 2))) (<= (+ v_ArrVal_308 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_308)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ 3 |c_ULTIMATE.start_main_~i~0#1|)) (not (<= v_ArrVal_308 (+ v_ArrVal_306 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_306)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= v_ArrVal_306 (+ v_ArrVal_304 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_304)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (let ((.cse5 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (let ((.cse4 (mod .cse5 2))) (and (< .cse4 (+ v_ArrVal_298 2)) (or (and (< .cse5 0) (not (= .cse4 0))) (not (<= v_ArrVal_298 .cse4)))))) (not (<= v_ArrVal_304 (+ v_ArrVal_302 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_302)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_302 0)))))) is different from false [2022-07-13 11:12:11,076 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:12:11,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 546764 treesize of output 543380 [2022-07-13 11:12:14,991 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-13 11:12:15,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 11:12:15,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:12:15,208 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:545) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:139) 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.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.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.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) 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.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) 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) [2022-07-13 11:12:15,211 INFO L158 Benchmark]: Toolchain (without parser) took 203163.96ms. Allocated memory was 100.7MB in the beginning and 295.7MB in the end (delta: 195.0MB). Free memory was 71.3MB in the beginning and 218.4MB in the end (delta: -147.1MB). Peak memory consumption was 178.8MB. Max. memory is 16.1GB. [2022-07-13 11:12:15,211 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 100.7MB. Free memory was 58.1MB in the beginning and 58.0MB in the end (delta: 44.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:12:15,211 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.10ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 71.1MB in the beginning and 96.8MB in the end (delta: -25.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 11:12:15,211 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.70ms. Allocated memory is still 121.6MB. Free memory was 96.8MB in the beginning and 94.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 11:12:15,212 INFO L158 Benchmark]: Boogie Preprocessor took 20.09ms. Allocated memory is still 121.6MB. Free memory was 94.9MB in the beginning and 93.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 11:12:15,212 INFO L158 Benchmark]: RCFGBuilder took 235.89ms. Allocated memory is still 121.6MB. Free memory was 93.8MB in the beginning and 83.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 11:12:15,212 INFO L158 Benchmark]: TraceAbstraction took 202661.25ms. Allocated memory was 121.6MB in the beginning and 295.7MB in the end (delta: 174.1MB). Free memory was 82.8MB in the beginning and 218.4MB in the end (delta: -135.6MB). Peak memory consumption was 171.6MB. Max. memory is 16.1GB. [2022-07-13 11:12:15,213 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 100.7MB. Free memory was 58.1MB in the beginning and 58.0MB in the end (delta: 44.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 212.10ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 71.1MB in the beginning and 96.8MB in the end (delta: -25.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.70ms. Allocated memory is still 121.6MB. Free memory was 96.8MB in the beginning and 94.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.09ms. Allocated memory is still 121.6MB. Free memory was 94.9MB in the beginning and 93.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 235.89ms. Allocated memory is still 121.6MB. Free memory was 93.8MB in the beginning and 83.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 202661.25ms. Allocated memory was 121.6MB in the beginning and 295.7MB in the end (delta: 174.1MB). Free memory was 82.8MB in the beginning and 218.4MB in the end (delta: -135.6MB). Peak memory consumption was 171.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-13 11:12:15,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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-fpi/ms2.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 125fe310e2ae1e5a109eb21d52d95bf156448ac6c5b2e6793bd0b6f80e48ce1d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:12:17,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:12:17,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:12:17,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:12:17,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:12:17,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:12:17,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:12:17,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:12:17,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:12:17,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:12:17,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:12:17,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:12:17,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:12:17,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:12:17,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:12:17,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:12:17,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:12:17,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:12:17,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:12:17,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:12:17,182 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:12:17,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:12:17,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:12:17,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:12:17,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:12:17,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:12:17,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:12:17,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:12:17,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:12:17,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:12:17,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:12:17,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:12:17,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:12:17,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:12:17,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:12:17,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:12:17,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:12:17,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:12:17,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:12:17,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:12:17,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:12:17,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:12:17,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-13 11:12:17,248 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:12:17,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:12:17,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:12:17,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:12:17,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:12:17,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:12:17,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:12:17,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:12:17,252 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:12:17,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:12:17,253 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:12:17,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:12:17,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:12:17,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:12:17,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:12:17,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:12:17,264 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 11:12:17,264 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 11:12:17,264 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 11:12:17,264 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:12:17,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:12:17,265 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:12:17,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:12:17,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:12:17,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:12:17,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:12:17,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:12:17,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:12:17,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:12:17,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:12:17,267 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 11:12:17,267 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 11:12:17,267 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:12:17,267 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:12:17,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:12:17,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 11:12:17,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 125fe310e2ae1e5a109eb21d52d95bf156448ac6c5b2e6793bd0b6f80e48ce1d [2022-07-13 11:12:17,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:12:17,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:12:17,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:12:17,613 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:12:17,613 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:12:17,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ms2.c [2022-07-13 11:12:17,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e166051e6/eafeb17fc61949ac88a513119b3df9b6/FLAG30028acae [2022-07-13 11:12:18,206 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:12:18,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms2.c [2022-07-13 11:12:18,213 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e166051e6/eafeb17fc61949ac88a513119b3df9b6/FLAG30028acae [2022-07-13 11:12:18,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e166051e6/eafeb17fc61949ac88a513119b3df9b6 [2022-07-13 11:12:18,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:12:18,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:12:18,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:12:18,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:12:18,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:12:18,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6818ee44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18, skipping insertion in model container [2022-07-13 11:12:18,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:12:18,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:12:18,848 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-fpi/ms2.c[586,599] [2022-07-13 11:12:18,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:12:18,878 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:12:18,888 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-fpi/ms2.c[586,599] [2022-07-13 11:12:18,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:12:18,907 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:12:18,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18 WrapperNode [2022-07-13 11:12:18,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:12:18,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:12:18,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:12:18,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:12:18,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,938 INFO L137 Inliner]: procedures = 19, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2022-07-13 11:12:18,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:12:18,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:12:18,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:12:18,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:12:18,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:12:18,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:12:18,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:12:18,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:12:18,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18" (1/1) ... [2022-07-13 11:12:18,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:12:18,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:12:19,015 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) [2022-07-13 11:12:19,050 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 [2022-07-13 11:12:19,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:12:19,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 11:12:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 11:12:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:12:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-13 11:12:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:12:19,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:12:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 11:12:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-13 11:12:19,151 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:12:19,153 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:12:19,378 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:12:19,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:12:19,383 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 11:12:19,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:12:19 BoogieIcfgContainer [2022-07-13 11:12:19,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:12:19,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:12:19,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:12:19,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:12:19,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:12:18" (1/3) ... [2022-07-13 11:12:19,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:12:19, skipping insertion in model container [2022-07-13 11:12:19,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:12:18" (2/3) ... [2022-07-13 11:12:19,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:12:19, skipping insertion in model container [2022-07-13 11:12:19,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:12:19" (3/3) ... [2022-07-13 11:12:19,392 INFO L111 eAbstractionObserver]: Analyzing ICFG ms2.c [2022-07-13 11:12:19,427 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:12:19,427 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:12:19,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:12:19,498 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@668d31e9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6b8b5bbb [2022-07-13 11:12:19,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:12:19,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 11:12:19,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:19,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:19,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:19,516 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2022-07-13 11:12:19,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:19,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648349808] [2022-07-13 11:12:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:12:19,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:19,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:19,534 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) [2022-07-13 11:12:19,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 11:12:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:12:19,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 11:12:19,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:19,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:12:19,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:12:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648349808] [2022-07-13 11:12:19,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648349808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:12:19,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:12:19,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:12:19,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025808653] [2022-07-13 11:12:19,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:12:19,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 11:12:19,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:12:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 11:12:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:12:19,707 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:19,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:19,722 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-07-13 11:12:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 11:12:19,724 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 11:12:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:19,731 INFO L225 Difference]: With dead ends: 34 [2022-07-13 11:12:19,731 INFO L226 Difference]: Without dead ends: 15 [2022-07-13 11:12:19,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:12:19,740 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2022-07-13 11:12:19,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:12:19,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-13 11:12:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-13 11:12:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-13 11:12:19,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-07-13 11:12:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:19,788 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-13 11:12:19,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:19,789 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-13 11:12:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 11:12:19,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:19,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:19,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:12:19,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:19,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:19,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:19,992 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2022-07-13 11:12:19,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:19,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259450051] [2022-07-13 11:12:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:12:19,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:19,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:19,994 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) [2022-07-13 11:12:19,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 11:12:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:12:20,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 11:12:20,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:20,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:12:20,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:12:20,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259450051] [2022-07-13 11:12:20,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259450051] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:12:20,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:12:20,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:12:20,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329243269] [2022-07-13 11:12:20,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:12:20,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:12:20,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:12:20,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:12:20,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:12:20,179 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:20,310 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-07-13 11:12:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:12:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 11:12:20,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:20,314 INFO L225 Difference]: With dead ends: 28 [2022-07-13 11:12:20,314 INFO L226 Difference]: Without dead ends: 20 [2022-07-13 11:12:20,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:12:20,316 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:12:20,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 9 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:12:20,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-13 11:12:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-07-13 11:12:20,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-07-13 11:12:20,329 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2022-07-13 11:12:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:20,330 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-07-13 11:12:20,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-07-13 11:12:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 11:12:20,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:20,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:20,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:12:20,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:20,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:20,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:20,548 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2022-07-13 11:12:20,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:20,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653525309] [2022-07-13 11:12:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:12:20,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:20,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:20,552 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) [2022-07-13 11:12:20,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 11:12:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:12:20,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:12:20,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:20,657 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 11 treesize of output 7 [2022-07-13 11:12:20,747 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 32 treesize of output 20 [2022-07-13 11:12:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:12:20,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:12:20,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:12:20,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653525309] [2022-07-13 11:12:20,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653525309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:12:20,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:12:20,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:12:20,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601057464] [2022-07-13 11:12:20,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:12:20,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:12:20,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:12:20,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:12:20,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:12:20,780 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:20,842 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-13 11:12:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:12:20,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-13 11:12:20,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:20,848 INFO L225 Difference]: With dead ends: 25 [2022-07-13 11:12:20,848 INFO L226 Difference]: Without dead ends: 21 [2022-07-13 11:12:20,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:12:20,851 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:12:20,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 25 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:12:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-13 11:12:20,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-07-13 11:12:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-13 11:12:20,860 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2022-07-13 11:12:20,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:20,860 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-13 11:12:20,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:20,861 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-13 11:12:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 11:12:20,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:20,862 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:20,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:12:21,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:21,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:21,078 INFO L85 PathProgramCache]: Analyzing trace with hash -422196611, now seen corresponding path program 1 times [2022-07-13 11:12:21,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:21,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376226613] [2022-07-13 11:12:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:12:21,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:21,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:21,081 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) [2022-07-13 11:12:21,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 11:12:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:12:21,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:12:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:21,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:12:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:21,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:12:21,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376226613] [2022-07-13 11:12:21,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376226613] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:12:21,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:12:21,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2022-07-13 11:12:21,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81494965] [2022-07-13 11:12:21,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:12:21,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:12:21,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:12:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:12:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:12:21,423 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:21,765 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-13 11:12:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:12:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-13 11:12:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:21,766 INFO L225 Difference]: With dead ends: 39 [2022-07-13 11:12:21,766 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 11:12:21,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-07-13 11:12:21,768 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:12:21,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 17 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:12:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 11:12:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-07-13 11:12:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-07-13 11:12:21,772 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2022-07-13 11:12:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:21,772 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-07-13 11:12:21,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-07-13 11:12:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 11:12:21,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:21,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:21,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:12:21,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:21,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:21,982 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 2 times [2022-07-13 11:12:21,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:21,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799719653] [2022-07-13 11:12:21,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:12:21,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:21,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:21,984 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) [2022-07-13 11:12:21,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 11:12:22,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:12:22,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:12:22,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:12:22,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:22,109 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 10 treesize of output 8 [2022-07-13 11:12:22,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 11:12:22,314 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 21 treesize of output 20 [2022-07-13 11:12:22,450 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 0 case distinctions, treesize of input 40 treesize of output 25 [2022-07-13 11:12:22,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-07-13 11:12:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:22,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:12:25,877 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0#1.offset| (_ BitVec 32))) (bvsle (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset| (_ bv0 32))) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv4 32))) c_~N~0)) is different from false [2022-07-13 11:12:25,917 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 86 treesize of output 80 [2022-07-13 11:12:26,207 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 10 treesize of output 8 [2022-07-13 11:12:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-13 11:12:28,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:12:28,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799719653] [2022-07-13 11:12:28,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799719653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:12:28,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:12:28,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-07-13 11:12:28,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330789653] [2022-07-13 11:12:28,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:12:28,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 11:12:28,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:12:28,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 11:12:28,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=334, Unknown=3, NotChecked=38, Total=462 [2022-07-13 11:12:28,046 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:32,002 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-07-13 11:12:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 11:12:32,003 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-13 11:12:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:32,004 INFO L225 Difference]: With dead ends: 41 [2022-07-13 11:12:32,004 INFO L226 Difference]: Without dead ends: 37 [2022-07-13 11:12:32,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=172, Invalid=699, Unknown=3, NotChecked=56, Total=930 [2022-07-13 11:12:32,005 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:12:32,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 41 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 149 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-07-13 11:12:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-13 11:12:32,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-07-13 11:12:32,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-07-13 11:12:32,011 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 21 [2022-07-13 11:12:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:32,012 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-07-13 11:12:32,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-07-13 11:12:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 11:12:32,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:32,013 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:32,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-13 11:12:32,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:32,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:32,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2075570815, now seen corresponding path program 3 times [2022-07-13 11:12:32,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:32,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125680133] [2022-07-13 11:12:32,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:12:32,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:32,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:32,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:12:32,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-13 11:12:32,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 11:12:32,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:12:32,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 11:12:32,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:32,346 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 10 treesize of output 8 [2022-07-13 11:12:32,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-13 11:12:32,763 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 28 treesize of output 27 [2022-07-13 11:12:33,167 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-13 11:12:33,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 40 [2022-07-13 11:12:33,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:33,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 27 [2022-07-13 11:12:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 11:12:33,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:12:38,671 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 86 treesize of output 80 [2022-07-13 11:12:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 11:12:38,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:12:38,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125680133] [2022-07-13 11:12:38,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125680133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:12:38,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:12:38,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2022-07-13 11:12:38,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59795355] [2022-07-13 11:12:38,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:12:38,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 11:12:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:12:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 11:12:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=571, Unknown=2, NotChecked=0, Total=702 [2022-07-13 11:12:38,692 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:41,930 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-07-13 11:12:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 11:12:41,930 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-13 11:12:41,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:41,931 INFO L225 Difference]: With dead ends: 42 [2022-07-13 11:12:41,931 INFO L226 Difference]: Without dead ends: 38 [2022-07-13 11:12:41,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=201, Invalid=918, Unknown=3, NotChecked=0, Total=1122 [2022-07-13 11:12:41,933 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:12:41,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 97 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-07-13 11:12:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-13 11:12:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-07-13 11:12:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-07-13 11:12:41,939 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2022-07-13 11:12:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:41,939 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-07-13 11:12:41,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-07-13 11:12:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 11:12:41,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:41,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:41,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:12:42,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:42,154 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash -301520475, now seen corresponding path program 4 times [2022-07-13 11:12:42,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:42,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602517022] [2022-07-13 11:12:42,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:12:42,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:42,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:42,157 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) [2022-07-13 11:12:42,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-13 11:12:42,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:12:42,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:12:42,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 11:12:42,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:42,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:12:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:42,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:12:42,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602517022] [2022-07-13 11:12:42,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602517022] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:12:42,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:12:42,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-07-13 11:12:42,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859046240] [2022-07-13 11:12:42,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:12:42,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 11:12:42,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:12:42,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 11:12:42,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-07-13 11:12:42,679 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:43,178 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-07-13 11:12:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:12:43,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-13 11:12:43,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:43,181 INFO L225 Difference]: With dead ends: 57 [2022-07-13 11:12:43,181 INFO L226 Difference]: Without dead ends: 39 [2022-07-13 11:12:43,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-07-13 11:12:43,182 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 117 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:12:43,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 27 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:12:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-13 11:12:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-07-13 11:12:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-07-13 11:12:43,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-07-13 11:12:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:43,192 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-07-13 11:12:43,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-07-13 11:12:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 11:12:43,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:43,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:43,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-13 11:12:43,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:43,400 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:43,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1384678109, now seen corresponding path program 5 times [2022-07-13 11:12:43,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:43,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835849166] [2022-07-13 11:12:43,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 11:12:43,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:43,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:43,402 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) [2022-07-13 11:12:43,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-13 11:12:43,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 11:12:43,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:12:43,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 11:12:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:43,531 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 10 treesize of output 8 [2022-07-13 11:12:43,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-13 11:12:43,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:43,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-13 11:12:43,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:43,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-13 11:12:43,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:43,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:43,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-07-13 11:12:44,132 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 0 case distinctions, treesize of input 45 treesize of output 35 [2022-07-13 11:12:44,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2022-07-13 11:12:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:44,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:12:52,728 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:12:52,729 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 7746 treesize of output 7362