./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 791161d1 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-?-791161d [2022-07-22 09:31:35,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:31:35,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:31:35,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:31:35,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:31:35,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:31:35,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:31:35,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:31:35,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:31:35,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:31:35,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:31:35,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:31:35,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:31:35,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:31:35,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:31:35,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:31:35,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:31:35,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:31:35,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:31:35,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:31:35,922 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:31:35,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:31:35,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:31:35,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:31:35,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:31:35,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:31:35,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:31:35,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:31:35,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:31:35,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:31:35,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:31:35,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:31:35,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:31:35,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:31:35,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:31:35,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:31:35,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:31:35,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:31:35,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:31:35,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:31:35,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:31:35,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:31:35,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:31:35,978 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:31:35,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:31:35,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:31:35,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:31:35,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:31:35,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:31:35,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:31:35,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:31:35,981 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:31:35,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:31:35,982 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:31:35,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:31:35,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:31:35,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:31:35,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:31:35,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:31:35,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:31:35,984 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:31:35,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:31:35,984 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:31:35,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:31:35,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:31:35,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:31:35,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:31:35,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:31:35,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:31:35,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:31:35,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:31:35,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:31:35,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:31:35,986 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:31:35,987 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:31:35,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:31:35,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cf6b517958e8017b93e9c3e9acb9e36cc315aaa95d19ed1c0795bb5e0096c62 [2022-07-22 09:31:36,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:31:36,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:31:36,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:31:36,258 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:31:36,259 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:31:36,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i [2022-07-22 09:31:36,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd980b356/518da0c5a81f40fda2831206dee5b04a/FLAG2071c44f9 [2022-07-22 09:31:36,773 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:31:36,774 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i [2022-07-22 09:31:36,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd980b356/518da0c5a81f40fda2831206dee5b04a/FLAG2071c44f9 [2022-07-22 09:31:37,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd980b356/518da0c5a81f40fda2831206dee5b04a [2022-07-22 09:31:37,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:31:37,172 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:31:37,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:31:37,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:31:37,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:31:37,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:31:37" (1/1) ... [2022-07-22 09:31:37,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55881cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:37, skipping insertion in model container [2022-07-22 09:31:37,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:31:37" (1/1) ... [2022-07-22 09:31:37,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:31:37,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:31:37,338 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] [2022-07-22 09:31:37,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:31:38,516 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:31:38,529 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] [2022-07-22 09:31:38,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:31:38,551 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:31:38,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38 WrapperNode [2022-07-22 09:31:38,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:31:38,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:31:38,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:31:38,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:31:38,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38" (1/1) ... [2022-07-22 09:31:38,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38" (1/1) ... [2022-07-22 09:31:38,585 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-07-22 09:31:38,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:31:38,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:31:38,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:31:38,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:31:38,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38" (1/1) ... [2022-07-22 09:31:38,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38" (1/1) ... [2022-07-22 09:31:38,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38" (1/1) ... [2022-07-22 09:31:38,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38" (1/1) ... [2022-07-22 09:31:38,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38" (1/1) ... [2022-07-22 09:31:38,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38" (1/1) ... [2022-07-22 09:31:38,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38" (1/1) ... [2022-07-22 09:31:38,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:31:38,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:31:38,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:31:38,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:31:38,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38" (1/1) ... [2022-07-22 09:31:38,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:31:38,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:31:38,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 09:31:38,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 09:31:38,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:31:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:31:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:31:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:31:38,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:31:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:31:38,747 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:31:38,749 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:31:38,861 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:31:38,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:31:38,867 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 09:31:38,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:31:38 BoogieIcfgContainer [2022-07-22 09:31:38,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:31:38,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:31:38,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:31:38,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:31:38,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:31:37" (1/3) ... [2022-07-22 09:31:38,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450981aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:31:38, skipping insertion in model container [2022-07-22 09:31:38,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:38" (2/3) ... [2022-07-22 09:31:38,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450981aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:31:38, skipping insertion in model container [2022-07-22 09:31:38,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:31:38" (3/3) ... [2022-07-22 09:31:38,880 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_break.i [2022-07-22 09:31:38,909 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:31:38,912 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:31:38,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:31:39,007 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6472ac79, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4db33625 [2022-07-22 09:31:39,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:31:39,017 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) [2022-07-22 09:31:39,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 09:31:39,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:31:39,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:31:39,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:31:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:31:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2022-07-22 09:31:39,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:31:39,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043199438] [2022-07-22 09:31:39,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:31:39,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:31:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:31:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:39,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:31:39,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043199438] [2022-07-22 09:31:39,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043199438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:31:39,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:31:39,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 09:31:39,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695517458] [2022-07-22 09:31:39,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:31:39,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 09:31:39,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:31:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 09:31:39,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:31:39,228 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) [2022-07-22 09:31:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:31:39,285 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2022-07-22 09:31:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 09:31:39,288 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 [2022-07-22 09:31:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:31:39,294 INFO L225 Difference]: With dead ends: 29 [2022-07-22 09:31:39,294 INFO L226 Difference]: Without dead ends: 13 [2022-07-22 09:31:39,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:31:39,300 INFO L413 NwaCegarLoop]: 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 [2022-07-22 09:31:39,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:31:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-22 09:31:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-07-22 09:31:39,325 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) [2022-07-22 09:31:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-07-22 09:31:39,326 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2022-07-22 09:31:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:31:39,327 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-07-22 09:31:39,327 INFO L496 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) [2022-07-22 09:31:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-07-22 09:31:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 09:31:39,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:31:39,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:31:39,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:31:39,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:31:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:31:39,329 INFO L85 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2022-07-22 09:31:39,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:31:39,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972133662] [2022-07-22 09:31:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:31:39,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:31:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:31:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:39,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:31:39,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972133662] [2022-07-22 09:31:39,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972133662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:31:39,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:31:39,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:31:39,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343661799] [2022-07-22 09:31:39,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:31:39,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:31:39,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:31:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:31:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:31:39,402 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) [2022-07-22 09:31:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:31:39,451 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-07-22 09:31:39,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:31:39,453 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 [2022-07-22 09:31:39,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:31:39,453 INFO L225 Difference]: With dead ends: 32 [2022-07-22 09:31:39,454 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 09:31:39,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:31:39,456 INFO L413 NwaCegarLoop]: 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 [2022-07-22 09:31:39,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:31:39,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 09:31:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-07-22 09:31:39,465 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) [2022-07-22 09:31:39,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-07-22 09:31:39,466 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2022-07-22 09:31:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:31:39,467 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-07-22 09:31:39,467 INFO L496 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) [2022-07-22 09:31:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-07-22 09:31:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 09:31:39,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:31:39,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:31:39,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 09:31:39,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:31:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:31:39,474 INFO L85 PathProgramCache]: Analyzing trace with hash -328289196, now seen corresponding path program 1 times [2022-07-22 09:31:39,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:31:39,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267463360] [2022-07-22 09:31:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:31:39,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:31:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:31:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:39,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:31:39,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267463360] [2022-07-22 09:31:39,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267463360] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:31:39,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:31:39,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:31:39,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554924749] [2022-07-22 09:31:39,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:31:39,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:31:39,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:31:39,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:31:39,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:31:39,522 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) [2022-07-22 09:31:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:31:39,541 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-07-22 09:31:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:31:39,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 09:31:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:31:39,544 INFO L225 Difference]: With dead ends: 25 [2022-07-22 09:31:39,544 INFO L226 Difference]: Without dead ends: 14 [2022-07-22 09:31:39,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:31:39,551 INFO L413 NwaCegarLoop]: 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 [2022-07-22 09:31:39,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:31:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-22 09:31:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-22 09:31:39,559 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) [2022-07-22 09:31:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-07-22 09:31:39,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2022-07-22 09:31:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:31:39,560 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-07-22 09:31:39,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:31:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-07-22 09:31:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 09:31:39,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:31:39,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:31:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 09:31:39,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:31:39,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:31:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1665715163, now seen corresponding path program 1 times [2022-07-22 09:31:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:31:39,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418236195] [2022-07-22 09:31:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:31:39,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:31:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:31:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:39,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:31:39,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418236195] [2022-07-22 09:31:39,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418236195] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:31:39,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778058897] [2022-07-22 09:31:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:31:39,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:31:39,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:31:39,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:31:39,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:31:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:31:39,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:31:39,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:31:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:39,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:31:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:39,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778058897] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:31:39,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:31:39,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 09:31:39,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862533478] [2022-07-22 09:31:39,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:31:39,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 09:31:39,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:31:39,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 09:31:39,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:31:39,828 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) [2022-07-22 09:31:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:31:39,907 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-07-22 09:31:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 09:31:39,908 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 [2022-07-22 09:31:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:31:39,909 INFO L225 Difference]: With dead ends: 53 [2022-07-22 09:31:39,909 INFO L226 Difference]: Without dead ends: 45 [2022-07-22 09:31:39,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:31:39,910 INFO L413 NwaCegarLoop]: 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:31:39,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 26 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:31:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-22 09:31:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 23. [2022-07-22 09:31:39,914 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) [2022-07-22 09:31:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-07-22 09:31:39,915 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2022-07-22 09:31:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:31:39,915 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-07-22 09:31:39,916 INFO L496 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) [2022-07-22 09:31:39,916 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-07-22 09:31:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 09:31:39,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:31:39,917 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:31:39,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 09:31:40,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:31:40,136 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:31:40,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:31:40,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1371826133, now seen corresponding path program 2 times [2022-07-22 09:31:40,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:31:40,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470606425] [2022-07-22 09:31:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:31:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:31:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:31:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:40,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:31:40,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470606425] [2022-07-22 09:31:40,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470606425] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:31:40,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847382292] [2022-07-22 09:31:40,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:31:40,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:31:40,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:31:40,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:31:40,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:31:40,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:31:40,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:31:40,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 09:31:40,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:31:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:40,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:31:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:40,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847382292] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:31:40,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:31:40,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-22 09:31:40,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216552020] [2022-07-22 09:31:40,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:31:40,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:31:40,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:31:40,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:31:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:31:40,450 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) [2022-07-22 09:31:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:31:40,584 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2022-07-22 09:31:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 09:31:40,585 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 [2022-07-22 09:31:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:31:40,588 INFO L225 Difference]: With dead ends: 113 [2022-07-22 09:31:40,588 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 09:31:40,589 INFO L412 NwaCegarLoop]: 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 [2022-07-22 09:31:40,590 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 156 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-22 09:31:40,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 48 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:31:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 09:31:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2022-07-22 09:31:40,599 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) [2022-07-22 09:31:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-07-22 09:31:40,600 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 20 [2022-07-22 09:31:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:31:40,600 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-07-22 09:31:40,600 INFO L496 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) [2022-07-22 09:31:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-07-22 09:31:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 09:31:40,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:31:40,602 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:31:40,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:31:40,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:31:40,819 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:31:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:31:40,820 INFO L85 PathProgramCache]: Analyzing trace with hash -332532075, now seen corresponding path program 3 times [2022-07-22 09:31:40,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:31:40,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430661566] [2022-07-22 09:31:40,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:31:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:31:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:31:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:41,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:31:41,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430661566] [2022-07-22 09:31:41,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430661566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:31:41,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950658962] [2022-07-22 09:31:41,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:31:41,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:31:41,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:31:41,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:31:41,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:31:41,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-22 09:31:41,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:31:41,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 09:31:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:31:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:41,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:31:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:41,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950658962] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:31:41,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:31:41,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-22 09:31:41,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011838567] [2022-07-22 09:31:41,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:31:41,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 09:31:41,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:31:41,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 09:31:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:31:41,445 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) [2022-07-22 09:31:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:31:41,744 INFO L93 Difference]: Finished difference Result 233 states and 246 transitions. [2022-07-22 09:31:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 09:31:41,747 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 [2022-07-22 09:31:41,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:31:41,751 INFO L225 Difference]: With dead ends: 233 [2022-07-22 09:31:41,751 INFO L226 Difference]: Without dead ends: 225 [2022-07-22 09:31:41,752 INFO L412 NwaCegarLoop]: 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 [2022-07-22 09:31:41,753 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 326 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:31:41,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 100 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:31:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-22 09:31:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 77. [2022-07-22 09:31:41,768 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) [2022-07-22 09:31:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-07-22 09:31:41,769 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 38 [2022-07-22 09:31:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:31:41,770 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-07-22 09:31:41,770 INFO L496 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) [2022-07-22 09:31:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-07-22 09:31:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 09:31:41,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:31:41,772 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:31:41,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:31:41,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:31:41,998 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:31:41,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:31:41,998 INFO L85 PathProgramCache]: Analyzing trace with hash 259163157, now seen corresponding path program 4 times [2022-07-22 09:31:41,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:31:41,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793615385] [2022-07-22 09:31:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:31:41,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:31:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:31:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:42,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:31:42,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793615385] [2022-07-22 09:31:42,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793615385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:31:42,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829045704] [2022-07-22 09:31:42,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:31:42,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:31:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:31:42,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:31:42,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:31:43,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:31:43,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:31:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 09:31:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:31:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:43,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:31:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:44,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829045704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:31:44,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:31:44,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-22 09:31:44,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112855525] [2022-07-22 09:31:44,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:31:44,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 09:31:44,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:31:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 09:31:44,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 09:31:44,221 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) [2022-07-22 09:31:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:31:44,814 INFO L93 Difference]: Finished difference Result 473 states and 498 transitions. [2022-07-22 09:31:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 09:31:44,815 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 [2022-07-22 09:31:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:31:44,817 INFO L225 Difference]: With dead ends: 473 [2022-07-22 09:31:44,817 INFO L226 Difference]: Without dead ends: 465 [2022-07-22 09:31:44,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 09:31:44,819 INFO L413 NwaCegarLoop]: 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:31:44,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 194 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:31:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-07-22 09:31:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 149. [2022-07-22 09:31:44,829 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) [2022-07-22 09:31:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-07-22 09:31:44,830 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 74 [2022-07-22 09:31:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:31:44,831 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-07-22 09:31:44,831 INFO L496 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) [2022-07-22 09:31:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-07-22 09:31:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-22 09:31:44,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:31:44,833 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:31:44,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:31:45,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:31:45,048 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:31:45,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:31:45,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1215209707, now seen corresponding path program 5 times [2022-07-22 09:31:45,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:31:45,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426038354] [2022-07-22 09:31:45,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:31:45,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:31:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:31:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:46,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:31:46,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426038354] [2022-07-22 09:31:46,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426038354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:31:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302121802] [2022-07-22 09:31:46,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:31:46,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:31:46,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:31:46,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:31:46,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:31:57,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-07-22 09:31:57,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:31:57,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 09:31:57,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:31:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:31:57,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:32:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:32:00,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302121802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:32:00,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:32:00,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-22 09:32:00,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863187877] [2022-07-22 09:32:00,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:32:00,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-22 09:32:00,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:32:00,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-22 09:32:00,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-22 09:32:00,101 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) [2022-07-22 09:32:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:32:02,574 INFO L93 Difference]: Finished difference Result 953 states and 1002 transitions. [2022-07-22 09:32:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-22 09:32:02,575 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 [2022-07-22 09:32:02,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:32:02,581 INFO L225 Difference]: With dead ends: 953 [2022-07-22 09:32:02,581 INFO L226 Difference]: Without dead ends: 945 [2022-07-22 09:32:02,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-22 09:32:02,585 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2886 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-07-22 09:32:02,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2886 Valid, 387 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 09:32:02,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-07-22 09:32:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 293. [2022-07-22 09:32:02,600 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) [2022-07-22 09:32:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2022-07-22 09:32:02,601 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 146 [2022-07-22 09:32:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:32:02,602 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2022-07-22 09:32:02,602 INFO L496 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) [2022-07-22 09:32:02,603 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2022-07-22 09:32:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-07-22 09:32:02,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:32:02,606 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:32:02,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:32:02,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:32:02,807 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:32:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:32:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1957041429, now seen corresponding path program 6 times [2022-07-22 09:32:02,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:32:02,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204435271] [2022-07-22 09:32:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:32:02,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:32:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:32:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:32:06,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:32:06,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204435271] [2022-07-22 09:32:06,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204435271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:32:06,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436806252] [2022-07-22 09:32:06,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:32:06,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:32:06,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:32:06,045 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:32:06,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process