./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_09.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_two_index_09.i -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 c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 20:50:10,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 20:50:10,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 20:50:10,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 20:50:10,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 20:50:10,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 20:50:10,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 20:50:10,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 20:50:10,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 20:50:10,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 20:50:10,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 20:50:10,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 20:50:10,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 20:50:10,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 20:50:10,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 20:50:10,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 20:50:10,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 20:50:10,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 20:50:10,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 20:50:10,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 20:50:10,965 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 20:50:10,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 20:50:10,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 20:50:10,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 20:50:10,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 20:50:10,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 20:50:10,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 20:50:10,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 20:50:10,976 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 20:50:10,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 20:50:10,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 20:50:10,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 20:50:10,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 20:50:10,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 20:50:10,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 20:50:10,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 20:50:10,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 20:50:10,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 20:50:10,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 20:50:10,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 20:50:10,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 20:50:10,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 20:50:10,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 20:50:11,011 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 20:50:11,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 20:50:11,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 20:50:11,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 20:50:11,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 20:50:11,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 20:50:11,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 20:50:11,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 20:50:11,014 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 20:50:11,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 20:50:11,015 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 20:50:11,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 20:50:11,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 20:50:11,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 20:50:11,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 20:50:11,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 20:50:11,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 20:50:11,016 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 20:50:11,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 20:50:11,016 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 20:50:11,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 20:50:11,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 20:50:11,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 20:50:11,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 20:50:11,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:50:11,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 20:50:11,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 20:50:11,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 20:50:11,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 20:50:11,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 20:50:11,018 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 20:50:11,018 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 20:50:11,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 20:50:11,018 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 [2022-07-20 20:50:11,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 20:50:11,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 20:50:11,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 20:50:11,223 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 20:50:11,224 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 20:50:11,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-07-20 20:50:11,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ce65a07e/e0a6669d672d476e803601583e1f9376/FLAG7aada699d [2022-07-20 20:50:11,636 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 20:50:11,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-07-20 20:50:11,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ce65a07e/e0a6669d672d476e803601583e1f9376/FLAG7aada699d [2022-07-20 20:50:11,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ce65a07e/e0a6669d672d476e803601583e1f9376 [2022-07-20 20:50:11,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 20:50:11,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 20:50:11,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 20:50:11,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 20:50:11,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 20:50:11,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238e2419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11, skipping insertion in model container [2022-07-20 20:50:11,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 20:50:11,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 20:50:11,764 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-examples/standard_two_index_09.i[814,827] [2022-07-20 20:50:11,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:50:11,788 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 20:50:11,796 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-examples/standard_two_index_09.i[814,827] [2022-07-20 20:50:11,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:50:11,811 INFO L208 MainTranslator]: Completed translation [2022-07-20 20:50:11,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11 WrapperNode [2022-07-20 20:50:11,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 20:50:11,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 20:50:11,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 20:50:11,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 20:50:11,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,846 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-07-20 20:50:11,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 20:50:11,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 20:50:11,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 20:50:11,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 20:50:11,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 20:50:11,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 20:50:11,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 20:50:11,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 20:50:11,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11" (1/1) ... [2022-07-20 20:50:11,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:50:11,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:50:11,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 20:50:11,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 20:50:11,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 20:50:11,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 20:50:11,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 20:50:11,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 20:50:11,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 20:50:11,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 20:50:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 20:50:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 20:50:11,980 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 20:50:11,981 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 20:50:12,111 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 20:50:12,116 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 20:50:12,116 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 20:50:12,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:50:12 BoogieIcfgContainer [2022-07-20 20:50:12,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 20:50:12,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 20:50:12,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 20:50:12,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 20:50:12,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 08:50:11" (1/3) ... [2022-07-20 20:50:12,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476282f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:50:12, skipping insertion in model container [2022-07-20 20:50:12,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:50:11" (2/3) ... [2022-07-20 20:50:12,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476282f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:50:12, skipping insertion in model container [2022-07-20 20:50:12,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:50:12" (3/3) ... [2022-07-20 20:50:12,125 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2022-07-20 20:50:12,138 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 20:50:12,139 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 20:50:12,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 20:50:12,195 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@3c1b5d5c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@29a41ca5 [2022-07-20 20:50:12,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 20:50:12,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:50:12,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 20:50:12,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:50:12,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:50:12,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:50:12,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:50:12,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2022-07-20 20:50:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:50:12,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489113677] [2022-07-20 20:50:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:50:12,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:50:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:50:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:50:12,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:50:12,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489113677] [2022-07-20 20:50:12,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489113677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:50:12,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:50:12,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 20:50:12,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145674209] [2022-07-20 20:50:12,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:50:12,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:50:12,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:50:12,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:50:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:50:12,384 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-20 20:50:12,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:50:12,405 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2022-07-20 20:50:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:50:12,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-07-20 20:50:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:50:12,417 INFO L225 Difference]: With dead ends: 28 [2022-07-20 20:50:12,418 INFO L226 Difference]: Without dead ends: 12 [2022-07-20 20:50:12,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:50:12,422 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:50:12,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:50:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-20 20:50:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-20 20:50:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:50:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-20 20:50:12,443 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-07-20 20:50:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:50:12,444 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-20 20:50:12,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-20 20:50:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-20 20:50:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 20:50:12,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:50:12,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:50:12,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 20:50:12,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:50:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:50:12,446 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2022-07-20 20:50:12,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:50:12,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119734306] [2022-07-20 20:50:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:50:12,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:50:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:50:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:50:12,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:50:12,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119734306] [2022-07-20 20:50:12,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119734306] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:50:12,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71643766] [2022-07-20 20:50:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:50:12,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:50:12,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:50:12,495 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:50:12,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 20:50:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:50:12,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 20:50:12,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:50:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:50:12,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 20:50:12,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71643766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:50:12,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 20:50:12,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-20 20:50:12,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653107881] [2022-07-20 20:50:12,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:50:12,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:50:12,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:50:12,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:50:12,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 20:50:12,617 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-07-20 20:50:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:50:12,640 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-07-20 20:50:12,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:50:12,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-07-20 20:50:12,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:50:12,641 INFO L225 Difference]: With dead ends: 24 [2022-07-20 20:50:12,641 INFO L226 Difference]: Without dead ends: 18 [2022-07-20 20:50:12,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 20:50:12,655 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:50:12,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:50:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-20 20:50:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-07-20 20:50:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-07-20 20:50:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-20 20:50:12,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-07-20 20:50:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:50:12,659 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-20 20:50:12,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-07-20 20:50:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-20 20:50:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 20:50:12,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:50:12,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:50:12,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 20:50:12,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:50:12,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:50:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:50:12,862 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2022-07-20 20:50:12,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:50:12,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337679207] [2022-07-20 20:50:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:50:12,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:50:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:50:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:50:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:50:12,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337679207] [2022-07-20 20:50:12,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337679207] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:50:12,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826352566] [2022-07-20 20:50:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:50:12,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:50:12,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:50:12,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:50:12,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 20:50:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:50:13,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 20:50:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:50:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:50:13,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:50:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:50:13,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826352566] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:50:13,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:50:13,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 20:50:13,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20030855] [2022-07-20 20:50:13,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:50:13,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 20:50:13,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:50:13,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 20:50:13,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:50:13,068 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2022-07-20 20:50:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:50:13,097 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-07-20 20:50:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 20:50:13,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 11 [2022-07-20 20:50:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:50:13,098 INFO L225 Difference]: With dead ends: 36 [2022-07-20 20:50:13,098 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 20:50:13,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:50:13,099 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:50:13,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:50:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 20:50:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-07-20 20:50:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:50:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-20 20:50:13,103 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-07-20 20:50:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:50:13,104 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-20 20:50:13,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2022-07-20 20:50:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-20 20:50:13,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 20:50:13,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:50:13,105 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:50:13,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 20:50:13,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-20 20:50:13,319 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:50:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:50:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2022-07-20 20:50:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:50:13,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145300278] [2022-07-20 20:50:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:50:13,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:50:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:50:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 20:50:13,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:50:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145300278] [2022-07-20 20:50:13,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145300278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:50:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3819516] [2022-07-20 20:50:13,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:50:13,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:50:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:50:13,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:50:13,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 20:50:13,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:50:13,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:50:13,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 20:50:13,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:50:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 20:50:13,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:50:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 20:50:13,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3819516] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:50:13,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:50:13,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-07-20 20:50:13,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673167019] [2022-07-20 20:50:13,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:50:13,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 20:50:13,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:50:13,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 20:50:13,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2022-07-20 20:50:13,553 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:50:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:50:13,624 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-07-20 20:50:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 20:50:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-20 20:50:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:50:13,625 INFO L225 Difference]: With dead ends: 57 [2022-07-20 20:50:13,625 INFO L226 Difference]: Without dead ends: 47 [2022-07-20 20:50:13,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2022-07-20 20:50:13,626 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:50:13,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:50:13,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-20 20:50:13,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2022-07-20 20:50:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:50:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-07-20 20:50:13,630 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2022-07-20 20:50:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:50:13,630 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-07-20 20:50:13,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:50:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-07-20 20:50:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 20:50:13,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:50:13,631 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:50:13,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 20:50:13,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:50:13,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:50:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:50:13,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1448090520, now seen corresponding path program 3 times [2022-07-20 20:50:13,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:50:13,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812752080] [2022-07-20 20:50:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:50:13,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:50:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:50:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-20 20:50:13,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:50:13,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812752080] [2022-07-20 20:50:13,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812752080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:50:13,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761929065] [2022-07-20 20:50:13,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:50:13,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:50:13,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:50:13,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:50:13,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 20:50:13,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 20:50:13,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:50:13,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 20:50:14,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:50:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-20 20:50:14,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:50:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-20 20:50:14,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761929065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:50:14,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:50:14,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-20 20:50:14,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610303572] [2022-07-20 20:50:14,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:50:14,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 20:50:14,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:50:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 20:50:14,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 20:50:14,057 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2022-07-20 20:50:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:50:14,122 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2022-07-20 20:50:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 20:50:14,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) Word has length 25 [2022-07-20 20:50:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:50:14,123 INFO L225 Difference]: With dead ends: 85 [2022-07-20 20:50:14,123 INFO L226 Difference]: Without dead ends: 79 [2022-07-20 20:50:14,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 20:50:14,124 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:50:14,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:50:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-20 20:50:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 33. [2022-07-20 20:50:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:50:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-07-20 20:50:14,129 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2022-07-20 20:50:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:50:14,130 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-07-20 20:50:14,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2022-07-20 20:50:14,130 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-07-20 20:50:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 20:50:14,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:50:14,131 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:50:14,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-20 20:50:14,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:50:14,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:50:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:50:14,349 INFO L85 PathProgramCache]: Analyzing trace with hash -798905000, now seen corresponding path program 4 times [2022-07-20 20:50:14,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:50:14,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226697464] [2022-07-20 20:50:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:50:14,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:50:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:50:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-20 20:50:14,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:50:14,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226697464] [2022-07-20 20:50:14,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226697464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:50:14,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694575558] [2022-07-20 20:50:14,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:50:14,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:50:14,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:50:14,476 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:50:14,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 20:50:14,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:50:14,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:50:14,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 20:50:14,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:50:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-20 20:50:14,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:50:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-20 20:50:14,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694575558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:50:14,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:50:14,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2022-07-20 20:50:14,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272741214] [2022-07-20 20:50:14,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:50:14,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 20:50:14,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:50:14,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 20:50:14,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 20:50:14,796 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:50:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:50:14,922 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2022-07-20 20:50:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-20 20:50:14,922 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-20 20:50:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:50:14,923 INFO L225 Difference]: With dead ends: 142 [2022-07-20 20:50:14,923 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 20:50:14,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 20:50:14,925 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 171 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:50:14,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 72 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:50:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 20:50:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 59. [2022-07-20 20:50:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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) [2022-07-20 20:50:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-07-20 20:50:14,938 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 31 [2022-07-20 20:50:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:50:14,939 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-07-20 20:50:14,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:50:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-07-20 20:50:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 20:50:14,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:50:14,940 INFO L195 NwaCegarLoop]: trace histogram [35, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:50:14,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 20:50:15,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:50:15,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:50:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:50:15,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1918403063, now seen corresponding path program 5 times [2022-07-20 20:50:15,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:50:15,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409510798] [2022-07-20 20:50:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:50:15,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:50:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:50:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-07-20 20:50:15,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:50:15,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409510798] [2022-07-20 20:50:15,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409510798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:50:15,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006263368] [2022-07-20 20:50:15,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:50:15,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:50:15,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:50:15,409 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:50:15,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 20:54:03,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-07-20 20:54:03,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:54:04,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 20:54:04,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:54:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-20 20:54:04,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:54:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-20 20:54:05,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006263368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:54:05,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:54:05,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 38, 38] total 85 [2022-07-20 20:54:05,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65564468] [2022-07-20 20:54:05,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:54:05,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-20 20:54:05,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:54:05,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-20 20:54:05,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3569, Invalid=3571, Unknown=0, NotChecked=0, Total=7140 [2022-07-20 20:54:05,270 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 85 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 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) [2022-07-20 20:54:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:54:05,551 INFO L93 Difference]: Finished difference Result 222 states and 277 transitions. [2022-07-20 20:54:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-20 20:54:05,552 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 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 57 [2022-07-20 20:54:05,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:54:05,553 INFO L225 Difference]: With dead ends: 222 [2022-07-20 20:54:05,553 INFO L226 Difference]: Without dead ends: 201 [2022-07-20 20:54:05,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3891 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3569, Invalid=3571, Unknown=0, NotChecked=0, Total=7140 [2022-07-20 20:54:05,555 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 423 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:54:05,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 106 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:54:05,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-20 20:54:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 111. [2022-07-20 20:54:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 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) [2022-07-20 20:54:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-07-20 20:54:05,564 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 57 [2022-07-20 20:54:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:54:05,564 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-07-20 20:54:05,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 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) [2022-07-20 20:54:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-07-20 20:54:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 20:54:05,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:54:05,566 INFO L195 NwaCegarLoop]: trace histogram [82, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:54:05,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 20:54:05,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:54:05,791 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:54:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:54:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash 25556088, now seen corresponding path program 6 times [2022-07-20 20:54:05,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:54:05,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872930784] [2022-07-20 20:54:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:54:05,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:54:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:54:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3574 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2022-07-20 20:54:06,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:54:06,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872930784] [2022-07-20 20:54:06,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872930784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:54:06,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040706320] [2022-07-20 20:54:06,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:54:06,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:54:06,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:54:06,091 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:54:06,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process