./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-industry-pattern/array_of_struct_break.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 1cf6b517958e8017b93e9c3e9acb9e36cc315aaa95d19ed1c0795bb5e0096c62 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:51:34,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:51:34,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:51:34,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:51:34,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:51:34,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:51:34,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:51:34,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:51:34,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:51:34,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:51:34,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:51:34,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:51:34,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:51:34,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:51:34,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:51:34,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:51:34,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:51:34,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:51:34,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:51:34,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:51:34,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:51:34,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:51:34,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:51:34,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:51:34,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:51:34,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:51:34,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:51:34,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:51:34,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:51:34,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:51:34,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:51:34,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:51:34,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:51:34,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:51:34,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:51:34,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:51:34,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:51:34,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:51:34,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:51:34,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:51:34,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:51:34,956 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:51:34,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:51:34,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:51:34,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:51:34,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:51:34,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:51:34,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:51:34,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:51:34,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:51:34,984 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:51:34,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:51:34,985 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:51:34,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:51:34,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:51:34,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:51:34,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:51:34,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:51:34,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:51:34,986 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:51:34,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:51:34,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:51:34,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:51:34,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:51:34,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:51:34,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:51:34,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:51:34,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:51:34,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:51:34,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:51:34,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:51:34,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:51:34,989 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:51:34,989 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:51:34,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:51:34,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:51:34,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cf6b517958e8017b93e9c3e9acb9e36cc315aaa95d19ed1c0795bb5e0096c62 [2021-12-21 09:51:35,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:51:35,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:51:35,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:51:35,252 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:51:35,253 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:51:35,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i [2021-12-21 09:51:35,314 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2c6f173/684a1b07e6e449bcbca7f1b225d05fc5/FLAG1e75d01d4 [2021-12-21 09:51:35,726 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:51:35,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i [2021-12-21 09:51:35,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2c6f173/684a1b07e6e449bcbca7f1b225d05fc5/FLAG1e75d01d4 [2021-12-21 09:51:35,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2c6f173/684a1b07e6e449bcbca7f1b225d05fc5 [2021-12-21 09:51:35,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:51:35,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:51:35,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:51:35,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:51:35,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:51:35,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:51:35" (1/1) ... [2021-12-21 09:51:35,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49c4756e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:35, skipping insertion in model container [2021-12-21 09:51:35,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:51:35" (1/1) ... [2021-12-21 09:51:35,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:51:35,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:51:35,925 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-industry-pattern/array_of_struct_break.i[854,867] [2021-12-21 09:51:35,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:51:36,867 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:51:36,891 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-industry-pattern/array_of_struct_break.i[854,867] [2021-12-21 09:51:36,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:51:36,907 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:51:36,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36 WrapperNode [2021-12-21 09:51:36,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:51:36,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:51:36,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:51:36,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:51:36,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36" (1/1) ... [2021-12-21 09:51:36,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36" (1/1) ... [2021-12-21 09:51:36,933 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-12-21 09:51:36,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:51:36,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:51:36,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:51:36,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:51:36,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36" (1/1) ... [2021-12-21 09:51:36,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36" (1/1) ... [2021-12-21 09:51:36,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36" (1/1) ... [2021-12-21 09:51:36,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36" (1/1) ... [2021-12-21 09:51:36,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36" (1/1) ... [2021-12-21 09:51:36,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36" (1/1) ... [2021-12-21 09:51:36,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36" (1/1) ... [2021-12-21 09:51:36,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:51:36,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:51:36,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:51:36,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:51:36,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36" (1/1) ... [2021-12-21 09:51:36,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:51:36,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:37,004 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) [2021-12-21 09:51:37,023 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 [2021-12-21 09:51:37,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:51:37,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:51:37,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:51:37,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:51:37,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:51:37,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:51:37,078 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:51:37,079 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:51:37,187 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:51:37,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:51:37,192 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 09:51:37,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:51:37 BoogieIcfgContainer [2021-12-21 09:51:37,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:51:37,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:51:37,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:51:37,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:51:37,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:51:35" (1/3) ... [2021-12-21 09:51:37,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2efba985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:51:37, skipping insertion in model container [2021-12-21 09:51:37,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:36" (2/3) ... [2021-12-21 09:51:37,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2efba985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:51:37, skipping insertion in model container [2021-12-21 09:51:37,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:51:37" (3/3) ... [2021-12-21 09:51:37,200 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_break.i [2021-12-21 09:51:37,203 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:51:37,204 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:51:37,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:51:37,259 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 09:51:37,259 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:51:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:51:37,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 09:51:37,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:37,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:37,275 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:37,279 INFO L85 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2021-12-21 09:51:37,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:37,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274688049] [2021-12-21 09:51:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:37,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:37,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:37,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274688049] [2021-12-21 09:51:37,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274688049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:51:37,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:51:37,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 09:51:37,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186490823] [2021-12-21 09:51:37,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:51:37,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 09:51:37,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 09:51:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 09:51:37,458 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-21 09:51:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:37,478 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-12-21 09:51:37,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 09:51:37,483 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-12-21 09:51:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:37,488 INFO L225 Difference]: With dead ends: 29 [2021-12-21 09:51:37,489 INFO L226 Difference]: Without dead ends: 13 [2021-12-21 09:51:37,491 INFO L932 BasicCegarLoop]: 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 [2021-12-21 09:51:37,494 INFO L933 BasicCegarLoop]: 20 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, 20 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 [2021-12-21 09:51:37,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:51:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-21 09:51:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-21 09:51:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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) [2021-12-21 09:51:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-12-21 09:51:37,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-12-21 09:51:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:37,519 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-12-21 09:51:37,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-21 09:51:37,519 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-12-21 09:51:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 09:51:37,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:37,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:37,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:51:37,520 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:37,522 INFO L85 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2021-12-21 09:51:37,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:37,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131087625] [2021-12-21 09:51:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:37,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:37,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:37,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131087625] [2021-12-21 09:51:37,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131087625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:51:37,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:51:37,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 09:51:37,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259028591] [2021-12-21 09:51:37,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:51:37,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:51:37,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:37,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:51:37,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:51:37,574 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-12-21 09:51:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:37,593 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-12-21 09:51:37,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:51:37,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-12-21 09:51:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:37,595 INFO L225 Difference]: With dead ends: 32 [2021-12-21 09:51:37,595 INFO L226 Difference]: Without dead ends: 24 [2021-12-21 09:51:37,595 INFO L932 BasicCegarLoop]: 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 [2021-12-21 09:51:37,596 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:37,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:51:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-21 09:51:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2021-12-21 09:51:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-12-21 09:51:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-12-21 09:51:37,600 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-12-21 09:51:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:37,600 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-12-21 09:51:37,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-12-21 09:51:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-12-21 09:51:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 09:51:37,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:37,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:37,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 09:51:37,602 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:37,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:37,603 INFO L85 PathProgramCache]: Analyzing trace with hash -328289196, now seen corresponding path program 1 times [2021-12-21 09:51:37,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:37,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226355512] [2021-12-21 09:51:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:37,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:37,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:37,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:37,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226355512] [2021-12-21 09:51:37,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226355512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:51:37,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:51:37,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 09:51:37,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518964424] [2021-12-21 09:51:37,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:51:37,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:51:37,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:37,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:51:37,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:51:37,638 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. 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) [2021-12-21 09:51:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:37,646 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-12-21 09:51:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:51:37,646 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 [2021-12-21 09:51:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:37,647 INFO L225 Difference]: With dead ends: 25 [2021-12-21 09:51:37,647 INFO L226 Difference]: Without dead ends: 14 [2021-12-21 09:51:37,647 INFO L932 BasicCegarLoop]: 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 [2021-12-21 09:51:37,648 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:37,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:51:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-21 09:51:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-21 09:51:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2021-12-21 09:51:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-12-21 09:51:37,652 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-12-21 09:51:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:37,652 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-12-21 09:51:37,652 INFO L471 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) [2021-12-21 09:51:37,653 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-12-21 09:51:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 09:51:37,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:37,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:37,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 09:51:37,654 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1665715163, now seen corresponding path program 1 times [2021-12-21 09:51:37,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:37,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714760769] [2021-12-21 09:51:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:37,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:37,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:37,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714760769] [2021-12-21 09:51:37,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714760769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:51:37,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120384729] [2021-12-21 09:51:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:37,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:37,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:37,697 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) [2021-12-21 09:51:37,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 09:51:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:37,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 09:51:37,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:51:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:37,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:51:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:37,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120384729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:51:37,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:51:37,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 09:51:37,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414862723] [2021-12-21 09:51:37,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:51:37,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 09:51:37,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:37,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 09:51:37,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:51:37,842 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-12-21 09:51:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:37,887 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-12-21 09:51:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 09:51:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) Word has length 11 [2021-12-21 09:51:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:37,889 INFO L225 Difference]: With dead ends: 53 [2021-12-21 09:51:37,889 INFO L226 Difference]: Without dead ends: 45 [2021-12-21 09:51:37,889 INFO L932 BasicCegarLoop]: 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 [2021-12-21 09:51:37,890 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:37,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 26 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:51:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-21 09:51:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 23. [2021-12-21 09:51:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 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) [2021-12-21 09:51:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-12-21 09:51:37,896 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-12-21 09:51:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:37,896 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-12-21 09:51:37,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-12-21 09:51:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-12-21 09:51:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 09:51:37,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:37,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:37,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 09:51:38,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:38,117 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:38,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1371826133, now seen corresponding path program 2 times [2021-12-21 09:51:38,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:38,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551348969] [2021-12-21 09:51:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:38,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:38,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:38,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551348969] [2021-12-21 09:51:38,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551348969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:51:38,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228976892] [2021-12-21 09:51:38,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:51:38,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:38,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:38,206 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) [2021-12-21 09:51:38,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 09:51:38,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:51:38,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:51:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 09:51:38,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:51:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:38,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:51:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:38,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228976892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:51:38,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:51:38,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-21 09:51:38,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077552044] [2021-12-21 09:51:38,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:51:38,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 09:51:38,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 09:51:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:51:38,439 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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) [2021-12-21 09:51:38,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:38,528 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2021-12-21 09:51:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 09:51:38,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 09:51:38,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:38,531 INFO L225 Difference]: With dead ends: 113 [2021-12-21 09:51:38,531 INFO L226 Difference]: Without dead ends: 105 [2021-12-21 09:51:38,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:51:38,534 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 156 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:38,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 48 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:51:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-21 09:51:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-12-21 09:51:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 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) [2021-12-21 09:51:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-21 09:51:38,542 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 20 [2021-12-21 09:51:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:38,542 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-21 09:51:38,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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) [2021-12-21 09:51:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-21 09:51:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 09:51:38,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:38,544 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:38,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 09:51:38,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:38,763 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:38,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:38,763 INFO L85 PathProgramCache]: Analyzing trace with hash -332532075, now seen corresponding path program 3 times [2021-12-21 09:51:38,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:38,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262459677] [2021-12-21 09:51:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:38,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:38,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:38,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262459677] [2021-12-21 09:51:38,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262459677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:51:38,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91084309] [2021-12-21 09:51:38,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:51:38,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:38,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:38,896 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) [2021-12-21 09:51:38,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 09:51:38,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-21 09:51:38,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:51:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 09:51:38,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:51:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:39,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:51:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:39,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91084309] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:51:39,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:51:39,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-21 09:51:39,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641963392] [2021-12-21 09:51:39,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:51:39,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 09:51:39,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 09:51:39,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:51:39,262 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 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) [2021-12-21 09:51:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:39,433 INFO L93 Difference]: Finished difference Result 233 states and 246 transitions. [2021-12-21 09:51:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 09:51:39,435 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 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 38 [2021-12-21 09:51:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:39,439 INFO L225 Difference]: With dead ends: 233 [2021-12-21 09:51:39,439 INFO L226 Difference]: Without dead ends: 225 [2021-12-21 09:51:39,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:51:39,441 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 326 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:39,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 100 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:51:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-21 09:51:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 77. [2021-12-21 09:51:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 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) [2021-12-21 09:51:39,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-12-21 09:51:39,456 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 38 [2021-12-21 09:51:39,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:39,456 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-12-21 09:51:39,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 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) [2021-12-21 09:51:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-12-21 09:51:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 09:51:39,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:39,460 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:39,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 09:51:39,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:39,678 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:39,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:39,678 INFO L85 PathProgramCache]: Analyzing trace with hash 259163157, now seen corresponding path program 4 times [2021-12-21 09:51:39,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:39,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778418984] [2021-12-21 09:51:39,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:39,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:40,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:40,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778418984] [2021-12-21 09:51:40,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778418984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:51:40,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176648537] [2021-12-21 09:51:40,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:51:40,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:40,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:40,199 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) [2021-12-21 09:51:40,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 09:51:41,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:51:41,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:51:41,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 09:51:41,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:51:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:41,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:51:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:41,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176648537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:51:41,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:51:41,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-21 09:51:41,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526373843] [2021-12-21 09:51:41,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:51:41,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-21 09:51:41,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:41,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-21 09:51:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:51:41,974 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 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) [2021-12-21 09:51:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:42,369 INFO L93 Difference]: Finished difference Result 473 states and 498 transitions. [2021-12-21 09:51:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-21 09:51:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 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 74 [2021-12-21 09:51:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:42,371 INFO L225 Difference]: With dead ends: 473 [2021-12-21 09:51:42,371 INFO L226 Difference]: Without dead ends: 465 [2021-12-21 09:51:42,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:51:42,373 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1172 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:42,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1172 Valid, 194 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:51:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-12-21 09:51:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 149. [2021-12-21 09:51:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 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) [2021-12-21 09:51:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-12-21 09:51:42,382 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 74 [2021-12-21 09:51:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:42,382 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-12-21 09:51:42,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 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) [2021-12-21 09:51:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-12-21 09:51:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-21 09:51:42,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:42,384 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:42,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 09:51:42,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:42,600 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1215209707, now seen corresponding path program 5 times [2021-12-21 09:51:42,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:42,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532547780] [2021-12-21 09:51:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:42,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:43,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:43,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532547780] [2021-12-21 09:51:43,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532547780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:51:43,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7984949] [2021-12-21 09:51:43,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:51:43,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:43,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:43,393 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) [2021-12-21 09:51:43,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 09:51:52,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-21 09:51:52,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:51:52,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 09:51:52,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:51:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:53,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:51:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:55,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7984949] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:51:55,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:51:55,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-12-21 09:51:55,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388089355] [2021-12-21 09:51:55,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:51:55,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-21 09:51:55,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:55,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-21 09:51:55,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-21 09:51:55,297 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 97 states, 97 states have (on average 2.9896907216494846) internal successors, (290), 97 states have internal predecessors, (290), 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) [2021-12-21 09:51:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:57,375 INFO L93 Difference]: Finished difference Result 953 states and 1002 transitions. [2021-12-21 09:51:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-21 09:51:57,376 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.9896907216494846) internal successors, (290), 97 states have internal predecessors, (290), 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 146 [2021-12-21 09:51:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:57,379 INFO L225 Difference]: With dead ends: 953 [2021-12-21 09:51:57,379 INFO L226 Difference]: Without dead ends: 945 [2021-12-21 09:51:57,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-21 09:51:57,382 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 2886 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2886 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:57,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2886 Valid, 387 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 09:51:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-12-21 09:51:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 293. [2021-12-21 09:51:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0068493150684932) internal successors, (294), 292 states have internal predecessors, (294), 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) [2021-12-21 09:51:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2021-12-21 09:51:57,393 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 146 [2021-12-21 09:51:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:57,394 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2021-12-21 09:51:57,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.9896907216494846) internal successors, (290), 97 states have internal predecessors, (290), 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) [2021-12-21 09:51:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2021-12-21 09:51:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-12-21 09:51:57,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:57,397 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:57,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 09:51:57,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:57,611 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1957041429, now seen corresponding path program 6 times [2021-12-21 09:51:57,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:57,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596002895] [2021-12-21 09:51:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:57,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:52:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:52:00,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:52:00,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596002895] [2021-12-21 09:52:00,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596002895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:52:00,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45341589] [2021-12-21 09:52:00,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 09:52:00,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:52:00,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:52:00,156 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) [2021-12-21 09:52:00,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process