./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.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 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:21:48,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:21:48,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:21:48,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:21:48,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:21:48,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:21:48,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:21:48,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:21:48,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:21:48,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:21:48,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:21:48,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:21:48,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:21:48,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:21:48,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:21:48,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:21:48,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:21:48,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:21:48,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:21:48,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:21:48,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:21:48,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:21:48,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:21:48,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:21:48,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:21:48,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:21:48,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:21:48,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:21:48,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:21:48,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:21:48,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:21:48,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:21:48,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:21:48,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:21:48,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:21:48,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:21:48,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:21:48,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:21:48,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:21:48,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:21:48,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:21:48,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:21:48,948 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:21:48,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:21:48,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:21:48,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:21:48,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:21:48,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:21:48,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:21:48,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:21:48,953 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:21:48,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:21:48,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:21:48,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:21:48,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:21:48,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:21:48,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:21:48,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:21:48,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:21:48,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:21:48,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:21:48,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:21:48,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:21:48,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:21:48,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:21:48,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:21:48,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:21:48,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:21:48,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:21:48,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:21:48,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:21:48,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:21:48,958 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:21:48,958 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:21:48,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:21:48,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:21:48,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 [2021-12-15 21:21:49,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:21:49,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:21:49,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:21:49,198 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:21:49,199 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:21:49,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2021-12-15 21:21:49,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d1c02565/12474411a06f4f73b4ceb81fe83c24b2/FLAG34b0da258 [2021-12-15 21:21:49,616 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:21:49,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2021-12-15 21:21:49,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d1c02565/12474411a06f4f73b4ceb81fe83c24b2/FLAG34b0da258 [2021-12-15 21:21:49,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d1c02565/12474411a06f4f73b4ceb81fe83c24b2 [2021-12-15 21:21:49,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:21:49,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:21:49,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:21:49,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:21:49,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:21:49,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5de1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49, skipping insertion in model container [2021-12-15 21:21:49,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:21:49,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:21:49,804 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2021-12-15 21:21:49,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:21:49,821 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:21:49,830 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2021-12-15 21:21:49,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:21:49,846 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:21:49,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49 WrapperNode [2021-12-15 21:21:49,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:21:49,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:21:49,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:21:49,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:21:49,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,887 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2021-12-15 21:21:49,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:21:49,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:21:49,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:21:49,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:21:49,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:21:49,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:21:49,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:21:49,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:21:49,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49" (1/1) ... [2021-12-15 21:21:49,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:21:49,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:21:49,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:21:49,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:21:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:21:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:21:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 21:21:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:21:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:21:49,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:21:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:21:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 21:21:50,053 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:21:50,054 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:21:50,145 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:21:50,150 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:21:50,151 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-15 21:21:50,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:21:50 BoogieIcfgContainer [2021-12-15 21:21:50,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:21:50,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:21:50,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:21:50,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:21:50,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:21:49" (1/3) ... [2021-12-15 21:21:50,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27593140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:21:50, skipping insertion in model container [2021-12-15 21:21:50,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:21:49" (2/3) ... [2021-12-15 21:21:50,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27593140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:21:50, skipping insertion in model container [2021-12-15 21:21:50,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:21:50" (3/3) ... [2021-12-15 21:21:50,169 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2021-12-15 21:21:50,173 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:21:50,186 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:21:50,261 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:21:50,270 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:21:50,270 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:21:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 21:21:50,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:21:50,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:21:50,300 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:21:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:21:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2021-12-15 21:21:50,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:21:50,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609720212] [2021-12-15 21:21:50,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:50,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:21:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:21:50,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:21:50,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609720212] [2021-12-15 21:21:50,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609720212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:21:50,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:21:50,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:21:50,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041962970] [2021-12-15 21:21:50,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:21:50,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:21:50,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:21:50,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:21:50,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:21:50,479 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:21:50,515 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2021-12-15 21:21:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:21:50,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-15 21:21:50,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:21:50,523 INFO L225 Difference]: With dead ends: 42 [2021-12-15 21:21:50,523 INFO L226 Difference]: Without dead ends: 20 [2021-12-15 21:21:50,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:21:50,528 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:21:50,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:21:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-15 21:21:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-12-15 21:21:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-12-15 21:21:50,556 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-12-15 21:21:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:21:50,557 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-12-15 21:21:50,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-12-15 21:21:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 21:21:50,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:21:50,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:21:50,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:21:50,562 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:21:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:21:50,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2021-12-15 21:21:50,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:21:50,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917225978] [2021-12-15 21:21:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:50,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:21:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:21:50,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:21:50,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917225978] [2021-12-15 21:21:50,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917225978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:21:50,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865568017] [2021-12-15 21:21:50,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:50,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:50,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:21:50,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:21:50,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:21:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:50,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 21:21:50,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:21:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:21:50,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:21:50,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865568017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:21:50,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:21:50,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 21:21:50,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639428951] [2021-12-15 21:21:50,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:21:50,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:21:50,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:21:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:21:50,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:21:50,727 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:21:50,747 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-12-15 21:21:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:21:50,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2021-12-15 21:21:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:21:50,750 INFO L225 Difference]: With dead ends: 32 [2021-12-15 21:21:50,752 INFO L226 Difference]: Without dead ends: 23 [2021-12-15 21:21:50,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:21:50,755 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:21:50,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:21:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-15 21:21:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-15 21:21:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-12-15 21:21:50,768 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2021-12-15 21:21:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:21:50,772 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-12-15 21:21:50,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-12-15 21:21:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 21:21:50,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:21:50,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:21:50,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:21:50,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:50,996 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:21:50,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:21:50,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2021-12-15 21:21:50,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:21:50,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865128047] [2021-12-15 21:21:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:50,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:21:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:21:51,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:21:51,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865128047] [2021-12-15 21:21:51,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865128047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:21:51,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050706583] [2021-12-15 21:21:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:51,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:51,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:21:51,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:21:51,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:21:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:51,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 21:21:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:21:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:21:51,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:21:51,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050706583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:21:51,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:21:51,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 21:21:51,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517680514] [2021-12-15 21:21:51,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:21:51,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:21:51,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:21:51,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:21:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:21:51,151 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:21:51,172 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-12-15 21:21:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:21:51,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 21:21:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:21:51,173 INFO L225 Difference]: With dead ends: 44 [2021-12-15 21:21:51,174 INFO L226 Difference]: Without dead ends: 27 [2021-12-15 21:21:51,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:21:51,175 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:21:51,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:21:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-15 21:21:51,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-12-15 21:21:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-12-15 21:21:51,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2021-12-15 21:21:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:21:51,184 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-12-15 21:21:51,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-12-15 21:21:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 21:21:51,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:21:51,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:21:51,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 21:21:51,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-15 21:21:51,400 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:21:51,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:21:51,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2021-12-15 21:21:51,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:21:51,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112117525] [2021-12-15 21:21:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:51,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:21:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:21:51,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:21:51,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112117525] [2021-12-15 21:21:51,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112117525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:21:51,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965936678] [2021-12-15 21:21:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:51,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:51,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:21:51,448 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:21:51,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:21:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 21:21:51,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:21:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:21:51,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:21:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:21:51,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965936678] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:21:51,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:21:51,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 21:21:51,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515570890] [2021-12-15 21:21:51,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:21:51,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 21:21:51,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:21:51,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 21:21:51,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:21:51,650 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:21:51,686 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2021-12-15 21:21:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:21:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) Word has length 17 [2021-12-15 21:21:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:21:51,688 INFO L225 Difference]: With dead ends: 49 [2021-12-15 21:21:51,688 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 21:21:51,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:21:51,692 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:21:51,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 59 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:21:51,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 21:21:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-15 21:21:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-12-15 21:21:51,704 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2021-12-15 21:21:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:21:51,705 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-12-15 21:21:51,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-12-15 21:21:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 21:21:51,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:21:51,709 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:21:51,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:21:51,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:51,924 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:21:51,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:21:51,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1612157157, now seen corresponding path program 2 times [2021-12-15 21:21:51,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:21:51,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25168345] [2021-12-15 21:21:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:51,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:21:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 21:21:51,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:21:51,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25168345] [2021-12-15 21:21:51,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25168345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:21:51,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896569750] [2021-12-15 21:21:51,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:21:51,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:51,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:21:51,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:21:51,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:21:52,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:21:52,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:21:52,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:21:52,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:21:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:21:52,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:21:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:21:52,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896569750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:21:52,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:21:52,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-15 21:21:52,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683421579] [2021-12-15 21:21:52,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:21:52,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 21:21:52,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:21:52,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 21:21:52,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:21:52,220 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:21:52,274 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2021-12-15 21:21:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 21:21:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-15 21:21:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:21:52,275 INFO L225 Difference]: With dead ends: 70 [2021-12-15 21:21:52,276 INFO L226 Difference]: Without dead ends: 51 [2021-12-15 21:21:52,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:21:52,277 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:21:52,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:21:52,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-15 21:21:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-12-15 21:21:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-15 21:21:52,282 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 23 [2021-12-15 21:21:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:21:52,283 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-15 21:21:52,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-15 21:21:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 21:21:52,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:21:52,284 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:21:52,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 21:21:52,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:52,499 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:21:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:21:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1679231593, now seen corresponding path program 3 times [2021-12-15 21:21:52,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:21:52,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692679251] [2021-12-15 21:21:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:52,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:21:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-15 21:21:52,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:21:52,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692679251] [2021-12-15 21:21:52,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692679251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:21:52,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150678634] [2021-12-15 21:21:52,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:21:52,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:52,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:21:52,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:21:52,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:21:52,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 21:21:52,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:21:52,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:21:52,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:21:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-15 21:21:52,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:21:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-15 21:21:52,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150678634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:21:52,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:21:52,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-15 21:21:52,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484273508] [2021-12-15 21:21:52,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:21:52,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:21:52,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:21:52,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:21:52,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:21:52,770 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:52,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:21:52,804 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2021-12-15 21:21:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:21:52,804 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 21:21:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:21:52,805 INFO L225 Difference]: With dead ends: 94 [2021-12-15 21:21:52,805 INFO L226 Difference]: Without dead ends: 71 [2021-12-15 21:21:52,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:21:52,806 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:21:52,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 58 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:21:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-15 21:21:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-15 21:21:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-12-15 21:21:52,813 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 38 [2021-12-15 21:21:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:21:52,813 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-12-15 21:21:52,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-12-15 21:21:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-15 21:21:52,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:21:52,815 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:21:52,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:21:53,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:53,033 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:21:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:21:53,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 4 times [2021-12-15 21:21:53,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:21:53,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768929340] [2021-12-15 21:21:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:53,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:21:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-15 21:21:53,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:21:53,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768929340] [2021-12-15 21:21:53,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768929340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:21:53,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389033316] [2021-12-15 21:21:53,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:21:53,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:53,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:21:53,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:21:53,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:21:53,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:21:53,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:21:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 21:21:53,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:21:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-15 21:21:53,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:21:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-15 21:21:53,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389033316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:21:53,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:21:53,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-15 21:21:53,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140782467] [2021-12-15 21:21:53,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:21:53,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 21:21:53,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:21:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 21:21:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 21:21:53,615 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:21:53,686 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2021-12-15 21:21:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 21:21:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 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 50 [2021-12-15 21:21:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:21:53,690 INFO L225 Difference]: With dead ends: 143 [2021-12-15 21:21:53,690 INFO L226 Difference]: Without dead ends: 95 [2021-12-15 21:21:53,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 21:21:53,692 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:21:53,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 78 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:21:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-15 21:21:53,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-15 21:21:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 94 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2021-12-15 21:21:53,713 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 50 [2021-12-15 21:21:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:21:53,714 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2021-12-15 21:21:53,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2021-12-15 21:21:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 21:21:53,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:21:53,716 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:21:53,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:21:53,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:53,939 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:21:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:21:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2132388991, now seen corresponding path program 5 times [2021-12-15 21:21:53,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:21:53,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747321841] [2021-12-15 21:21:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:53,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:21:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-15 21:21:54,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:21:54,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747321841] [2021-12-15 21:21:54,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747321841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:21:54,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814616324] [2021-12-15 21:21:54,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:21:54,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:54,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:21:54,292 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:21:54,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:21:54,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-15 21:21:54,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:21:54,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:21:54,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:21:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-15 21:21:54,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:21:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-15 21:21:55,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814616324] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:21:55,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:21:55,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2021-12-15 21:21:55,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450098274] [2021-12-15 21:21:55,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:21:55,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 21:21:55,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:21:55,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 21:21:55,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 21:21:55,063 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:21:55,181 INFO L93 Difference]: Finished difference Result 194 states and 258 transitions. [2021-12-15 21:21:55,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-15 21:21:55,181 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-15 21:21:55,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:21:55,182 INFO L225 Difference]: With dead ends: 194 [2021-12-15 21:21:55,182 INFO L226 Difference]: Without dead ends: 146 [2021-12-15 21:21:55,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 21:21:55,184 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:21:55,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 123 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:21:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-15 21:21:55,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-12-15 21:21:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2291666666666667) internal successors, (177), 144 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 177 transitions. [2021-12-15 21:21:55,197 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 177 transitions. Word has length 74 [2021-12-15 21:21:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:21:55,198 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 177 transitions. [2021-12-15 21:21:55,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 177 transitions. [2021-12-15 21:21:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-15 21:21:55,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:21:55,202 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:21:55,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 21:21:55,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:55,408 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:21:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:21:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash -478169085, now seen corresponding path program 6 times [2021-12-15 21:21:55,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:21:55,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640124823] [2021-12-15 21:21:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:55,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:21:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-12-15 21:21:55,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:21:55,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640124823] [2021-12-15 21:21:55,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640124823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:21:55,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353699800] [2021-12-15 21:21:55,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:21:55,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:55,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:21:55,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:21:55,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 21:21:56,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-12-15 21:21:56,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:21:56,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 21:21:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:21:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-12-15 21:21:56,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:21:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-12-15 21:21:57,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353699800] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:21:57,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:21:57,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 17] total 56 [2021-12-15 21:21:57,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586244008] [2021-12-15 21:21:57,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:21:57,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-15 21:21:57,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:21:57,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-15 21:21:57,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=2260, Unknown=0, NotChecked=0, Total=3080 [2021-12-15 21:21:57,242 INFO L87 Difference]: Start difference. First operand 145 states and 177 transitions. Second operand has 56 states, 56 states have (on average 2.75) internal successors, (154), 56 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:21:57,447 INFO L93 Difference]: Finished difference Result 340 states and 468 transitions. [2021-12-15 21:21:57,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-15 21:21:57,448 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.75) internal successors, (154), 56 states have internal predecessors, (154), 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 100 [2021-12-15 21:21:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:21:57,449 INFO L225 Difference]: With dead ends: 340 [2021-12-15 21:21:57,450 INFO L226 Difference]: Without dead ends: 244 [2021-12-15 21:21:57,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=2260, Unknown=0, NotChecked=0, Total=3080 [2021-12-15 21:21:57,455 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 163 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:21:57,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 227 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:21:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-15 21:21:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-12-15 21:21:57,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.2685950413223142) internal successors, (307), 242 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 307 transitions. [2021-12-15 21:21:57,478 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 307 transitions. Word has length 100 [2021-12-15 21:21:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:21:57,479 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 307 transitions. [2021-12-15 21:21:57,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.75) internal successors, (154), 56 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 307 transitions. [2021-12-15 21:21:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-15 21:21:57,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:21:57,484 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:21:57,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-15 21:21:57,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-15 21:21:57,698 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:21:57,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:21:57,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1848620027, now seen corresponding path program 7 times [2021-12-15 21:21:57,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:21:57,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094797671] [2021-12-15 21:21:57,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:57,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:21:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-12-15 21:21:58,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:21:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094797671] [2021-12-15 21:21:58,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094797671] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:21:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199801068] [2021-12-15 21:21:58,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:21:58,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:21:58,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:21:58,041 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:21:58,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 21:21:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:21:58,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 21:21:58,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:21:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-12-15 21:21:58,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:21:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-12-15 21:21:59,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199801068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:21:59,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:21:59,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2021-12-15 21:21:59,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021839693] [2021-12-15 21:21:59,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:21:59,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-15 21:21:59,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:21:59,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-15 21:21:59,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 21:21:59,260 INFO L87 Difference]: Start difference. First operand 243 states and 307 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:21:59,383 INFO L93 Difference]: Finished difference Result 487 states and 640 transitions. [2021-12-15 21:21:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-15 21:21:59,384 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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 150 [2021-12-15 21:21:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:21:59,385 INFO L225 Difference]: With dead ends: 487 [2021-12-15 21:21:59,385 INFO L226 Difference]: Without dead ends: 295 [2021-12-15 21:21:59,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 21:21:59,388 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:21:59,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 97 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:21:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-15 21:21:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2021-12-15 21:21:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.2210884353741496) internal successors, (359), 294 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 359 transitions. [2021-12-15 21:21:59,396 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 359 transitions. Word has length 150 [2021-12-15 21:21:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:21:59,397 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 359 transitions. [2021-12-15 21:21:59,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:21:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 359 transitions. [2021-12-15 21:21:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-15 21:21:59,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:21:59,400 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:21:59,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 21:21:59,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 21:21:59,615 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:21:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:21:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash -709856071, now seen corresponding path program 8 times [2021-12-15 21:21:59,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:21:59,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107508524] [2021-12-15 21:21:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:21:59,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:21:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-12-15 21:22:00,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:22:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107508524] [2021-12-15 21:22:00,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107508524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:22:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515152310] [2021-12-15 21:22:00,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:22:00,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:00,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:22:00,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:22:00,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 21:22:00,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:22:00,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:22:00,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-15 21:22:00,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:22:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-12-15 21:22:01,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:22:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-12-15 21:22:04,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515152310] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:22:04,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:22:04,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2021-12-15 21:22:04,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208104985] [2021-12-15 21:22:04,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:22:04,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-15 21:22:04,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:22:04,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-15 21:22:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-15 21:22:04,125 INFO L87 Difference]: Start difference. First operand 295 states and 359 transitions. Second operand has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:22:04,406 INFO L93 Difference]: Finished difference Result 591 states and 770 transitions. [2021-12-15 21:22:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-15 21:22:04,406 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 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 202 [2021-12-15 21:22:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:22:04,409 INFO L225 Difference]: With dead ends: 591 [2021-12-15 21:22:04,409 INFO L226 Difference]: Without dead ends: 399 [2021-12-15 21:22:04,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-15 21:22:04,412 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 153 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:22:04,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 97 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:22:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-12-15 21:22:04,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2021-12-15 21:22:04,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.1633165829145728) internal successors, (463), 398 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 463 transitions. [2021-12-15 21:22:04,432 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 463 transitions. Word has length 202 [2021-12-15 21:22:04,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:22:04,433 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 463 transitions. [2021-12-15 21:22:04,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:04,433 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 463 transitions. [2021-12-15 21:22:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 21:22:04,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:22:04,437 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:22:04,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 21:22:04,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 21:22:04,660 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:22:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:22:04,660 INFO L85 PathProgramCache]: Analyzing trace with hash -213372895, now seen corresponding path program 9 times [2021-12-15 21:22:04,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:22:04,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946870758] [2021-12-15 21:22:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:04,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:22:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-12-15 21:22:08,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:22:08,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946870758] [2021-12-15 21:22:08,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946870758] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:22:08,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364085436] [2021-12-15 21:22:08,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:22:08,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:08,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:22:08,290 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:22:08,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 21:22:12,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-12-15 21:22:12,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:22:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-15 21:22:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:22:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 204 proven. 1335 refuted. 0 times theorem prover too weak. 10201 trivial. 0 not checked. [2021-12-15 21:22:14,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:22:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 10404 trivial. 0 not checked. [2021-12-15 21:22:17,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364085436] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:22:17,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:22:17,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 35, 33] total 169 [2021-12-15 21:22:17,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262625782] [2021-12-15 21:22:17,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:22:17,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2021-12-15 21:22:17,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:22:17,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2021-12-15 21:22:17,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7686, Invalid=20706, Unknown=0, NotChecked=0, Total=28392 [2021-12-15 21:22:17,200 INFO L87 Difference]: Start difference. First operand 399 states and 463 transitions. Second operand has 169 states, 169 states have (on average 2.4319526627218937) internal successors, (411), 169 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:22:21,248 INFO L93 Difference]: Finished difference Result 787 states and 1044 transitions. [2021-12-15 21:22:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-12-15 21:22:21,249 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.4319526627218937) internal successors, (411), 169 states have internal predecessors, (411), 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 306 [2021-12-15 21:22:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:22:21,251 INFO L225 Difference]: With dead ends: 787 [2021-12-15 21:22:21,251 INFO L226 Difference]: Without dead ends: 595 [2021-12-15 21:22:21,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8774 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=11716, Invalid=41414, Unknown=0, NotChecked=0, Total=53130 [2021-12-15 21:22:21,256 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 688 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:22:21,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 253 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 21:22:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-15 21:22:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-12-15 21:22:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.2171717171717171) internal successors, (723), 594 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 723 transitions. [2021-12-15 21:22:21,269 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 723 transitions. Word has length 306 [2021-12-15 21:22:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:22:21,270 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 723 transitions. [2021-12-15 21:22:21,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.4319526627218937) internal successors, (411), 169 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 723 transitions. [2021-12-15 21:22:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-12-15 21:22:21,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:22:21,276 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:22:21,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 21:22:21,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 21:22:21,499 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:22:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:22:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash 792529061, now seen corresponding path program 10 times [2021-12-15 21:22:21,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:22:21,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79914100] [2021-12-15 21:22:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:21,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:22:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:22:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16552 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2021-12-15 21:22:25,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:22:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79914100] [2021-12-15 21:22:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79914100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:22:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669713116] [2021-12-15 21:22:25,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:22:25,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:22:25,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:22:25,218 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:22:25,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 21:22:25,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:22:25,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:22:25,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-15 21:22:25,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:22:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16552 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2021-12-15 21:22:26,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:22:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16552 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2021-12-15 21:22:36,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669713116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:22:36,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:22:36,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2021-12-15 21:22:36,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193022896] [2021-12-15 21:22:36,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:22:36,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2021-12-15 21:22:36,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:22:36,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2021-12-15 21:22:36,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2021-12-15 21:22:36,635 INFO L87 Difference]: Start difference. First operand 595 states and 723 transitions. Second operand has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:22:37,329 INFO L93 Difference]: Finished difference Result 1191 states and 1552 transitions. [2021-12-15 21:22:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-12-15 21:22:37,332 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 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 406 [2021-12-15 21:22:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:22:37,334 INFO L225 Difference]: With dead ends: 1191 [2021-12-15 21:22:37,335 INFO L226 Difference]: Without dead ends: 807 [2021-12-15 21:22:37,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 706 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2021-12-15 21:22:37,338 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 315 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:22:37,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 173 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 21:22:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-12-15 21:22:37,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2021-12-15 21:22:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.1600496277915633) internal successors, (935), 806 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:37,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 935 transitions. [2021-12-15 21:22:37,355 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 935 transitions. Word has length 406 [2021-12-15 21:22:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:22:37,356 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 935 transitions. [2021-12-15 21:22:37,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:22:37,356 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 935 transitions. [2021-12-15 21:22:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2021-12-15 21:22:37,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:22:37,369 INFO L514 BasicCegarLoop]: trace histogram [210, 210, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:22:37,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 21:22:37,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 21:22:37,571 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:22:37,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:22:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1976201735, now seen corresponding path program 11 times [2021-12-15 21:22:37,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:22:37,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621182968] [2021-12-15 21:22:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:22:37,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:22:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat