./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-sorted-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/forester-heap/sll-sorted-2.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 dc3896142acc5bdf441df6ee5a4320292e59871e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/forester-heap/sll-sorted-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dc3896142acc5bdf441df6ee5a4320292e59871e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:25:53,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:25:53,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:25:53,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:25:53,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:25:53,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:25:53,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:25:53,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:25:53,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:25:53,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:25:53,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:25:53,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:25:53,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:25:53,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:25:53,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:25:53,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:25:53,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:25:53,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:25:53,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:25:53,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:25:53,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:25:53,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:25:53,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:25:53,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:25:53,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:25:53,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:25:53,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:25:53,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:25:53,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:25:53,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:25:53,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:25:53,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:25:53,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:25:53,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:25:53,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:25:53,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:25:53,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:25:53,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:25:53,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:25:53,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:25:53,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:25:53,868 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:25:53,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:25:53,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:25:53,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:25:53,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:25:53,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:25:53,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:25:53,902 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:25:53,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:25:53,902 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:25:53,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:25:53,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:25:53,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:25:53,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:25:53,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:25:53,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:25:53,904 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:25:53,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:25:53,904 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:25:53,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:25:53,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:25:53,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:25:53,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:25:53,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:25:53,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:25:53,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:25:53,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:25:53,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:25:53,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:25:53,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:25:53,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:25:53,907 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc3896142acc5bdf441df6ee5a4320292e59871e [2021-08-26 02:25:54,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:25:54,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:25:54,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:25:54,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:25:54,236 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:25:54,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-sorted-2.i [2021-08-26 02:25:54,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f5994bbb/3943ec2e827f4b5798f1dfe5cf8739fb/FLAG05ec70a43 [2021-08-26 02:25:54,826 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:25:54,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i [2021-08-26 02:25:54,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f5994bbb/3943ec2e827f4b5798f1dfe5cf8739fb/FLAG05ec70a43 [2021-08-26 02:25:55,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f5994bbb/3943ec2e827f4b5798f1dfe5cf8739fb [2021-08-26 02:25:55,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:25:55,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:25:55,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:25:55,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:25:55,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:25:55,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f355ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55, skipping insertion in model container [2021-08-26 02:25:55,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:25:55,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:25:55,468 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22317,22330] [2021-08-26 02:25:55,471 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22452,22465] [2021-08-26 02:25:55,473 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22612,22625] [2021-08-26 02:25:55,475 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22941,22954] [2021-08-26 02:25:55,476 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23005,23018] [2021-08-26 02:25:55,477 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23136,23149] [2021-08-26 02:25:55,478 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23200,23213] [2021-08-26 02:25:55,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:25:55,487 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:25:55,513 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22317,22330] [2021-08-26 02:25:55,515 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22452,22465] [2021-08-26 02:25:55,516 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22612,22625] [2021-08-26 02:25:55,518 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22941,22954] [2021-08-26 02:25:55,519 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23005,23018] [2021-08-26 02:25:55,520 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23136,23149] [2021-08-26 02:25:55,520 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23200,23213] [2021-08-26 02:25:55,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:25:55,543 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:25:55,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55 WrapperNode [2021-08-26 02:25:55,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:25:55,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:25:55,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:25:55,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:25:55,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:25:55,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:25:55,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:25:55,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:25:55,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:25:55,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:25:55,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:25:55,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:25:55,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55" (1/1) ... [2021-08-26 02:25:55,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:25:55,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:55,634 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) [2021-08-26 02:25:55,660 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 [2021-08-26 02:25:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:25:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:25:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:25:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:25:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:25:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:25:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:25:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:25:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:25:55,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:25:56,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:25:56,217 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-08-26 02:25:56,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:25:56 BoogieIcfgContainer [2021-08-26 02:25:56,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:25:56,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:25:56,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:25:56,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:25:56,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:25:55" (1/3) ... [2021-08-26 02:25:56,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:25:56, skipping insertion in model container [2021-08-26 02:25:56,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:25:55" (2/3) ... [2021-08-26 02:25:56,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:25:56, skipping insertion in model container [2021-08-26 02:25:56,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:25:56" (3/3) ... [2021-08-26 02:25:56,226 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-sorted-2.i [2021-08-26 02:25:56,231 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:25:56,231 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-08-26 02:25:56,274 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:25:56,281 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-26 02:25:56,282 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-26 02:25:56,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 54 states have (on average 1.8518518518518519) internal successors, (100), 61 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:56,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:25:56,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:56,300 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:25:56,301 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:25:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash 890153286, now seen corresponding path program 1 times [2021-08-26 02:25:56,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:56,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680132135] [2021-08-26 02:25:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:56,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:56,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:56,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680132135] [2021-08-26 02:25:56,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680132135] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:25:56,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:25:56,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 02:25:56,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370611834] [2021-08-26 02:25:56,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:25:56,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:25:56,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:25:56,476 INFO L87 Difference]: Start difference. First operand has 62 states, 54 states have (on average 1.8518518518518519) internal successors, (100), 61 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 02:25:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:56,499 INFO L93 Difference]: Finished difference Result 118 states and 190 transitions. [2021-08-26 02:25:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:25:56,500 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-08-26 02:25:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:56,507 INFO L225 Difference]: With dead ends: 118 [2021-08-26 02:25:56,507 INFO L226 Difference]: Without dead ends: 56 [2021-08-26 02:25:56,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:25:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-26 02:25:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-08-26 02:25:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.346938775510204) internal successors, (66), 55 states have internal predecessors, (66), 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) [2021-08-26 02:25:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-08-26 02:25:56,550 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 6 [2021-08-26 02:25:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:56,550 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-08-26 02:25:56,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 02:25:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-08-26 02:25:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 02:25:56,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:56,551 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:56,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:25:56,552 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:25:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1806859191, now seen corresponding path program 1 times [2021-08-26 02:25:56,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:56,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576877146] [2021-08-26 02:25:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:56,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:56,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:56,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576877146] [2021-08-26 02:25:56,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576877146] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:25:56,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:25:56,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 02:25:56,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448471367] [2021-08-26 02:25:56,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:25:56,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:56,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:25:56,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:25:56,619 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-08-26 02:25:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:56,673 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2021-08-26 02:25:56,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:25:56,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-08-26 02:25:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:56,675 INFO L225 Difference]: With dead ends: 115 [2021-08-26 02:25:56,675 INFO L226 Difference]: Without dead ends: 61 [2021-08-26 02:25:56,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:25:56,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-26 02:25:56,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-08-26 02:25:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 59 states have internal predecessors, (71), 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) [2021-08-26 02:25:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-08-26 02:25:56,682 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 7 [2021-08-26 02:25:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:56,682 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-08-26 02:25:56,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-08-26 02:25:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-08-26 02:25:56,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 02:25:56,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:56,683 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:56,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 02:25:56,684 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:25:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:56,684 INFO L82 PathProgramCache]: Analyzing trace with hash 443319948, now seen corresponding path program 1 times [2021-08-26 02:25:56,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:56,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470404626] [2021-08-26 02:25:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:56,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:25:56,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:56,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470404626] [2021-08-26 02:25:56,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470404626] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:25:56,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:25:56,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 02:25:56,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124858635] [2021-08-26 02:25:56,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:25:56,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:25:56,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:25:56,760 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-08-26 02:25:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:56,896 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2021-08-26 02:25:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:25:56,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 11 [2021-08-26 02:25:56,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:56,898 INFO L225 Difference]: With dead ends: 99 [2021-08-26 02:25:56,898 INFO L226 Difference]: Without dead ends: 97 [2021-08-26 02:25:56,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:25:56,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-26 02:25:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2021-08-26 02:25:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 57 states have internal predecessors, (69), 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) [2021-08-26 02:25:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-08-26 02:25:56,906 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 11 [2021-08-26 02:25:56,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:56,907 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-08-26 02:25:56,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-08-26 02:25:56,907 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-08-26 02:25:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 02:25:56,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:56,908 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:56,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 02:25:56,908 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:25:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2064961448, now seen corresponding path program 1 times [2021-08-26 02:25:56,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:56,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009748248] [2021-08-26 02:25:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:56,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:57,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:57,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009748248] [2021-08-26 02:25:57,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009748248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:57,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439801118] [2021-08-26 02:25:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:57,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:57,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:57,236 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) [2021-08-26 02:25:57,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 02:25:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-26 02:25:57,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:57,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:25:57,452 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:25:57,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:25:57,464 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:25:57,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-26 02:25:57,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:25:57,589 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:25:57,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 76 [2021-08-26 02:25:57,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 76 [2021-08-26 02:25:57,598 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:25:57,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 55 [2021-08-26 02:25:57,907 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:25:57,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 65 [2021-08-26 02:25:57,924 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-08-26 02:25:57,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 38 [2021-08-26 02:25:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:57,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439801118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:57,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:57,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-26 02:25:57,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692062247] [2021-08-26 02:25:57,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 02:25:57,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:57,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 02:25:57,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:25:57,944 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:58,435 INFO L93 Difference]: Finished difference Result 144 states and 176 transitions. [2021-08-26 02:25:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 02:25:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 02:25:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:58,437 INFO L225 Difference]: With dead ends: 144 [2021-08-26 02:25:58,437 INFO L226 Difference]: Without dead ends: 88 [2021-08-26 02:25:58,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:25:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-26 02:25:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2021-08-26 02:25:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 70 states have internal predecessors, (85), 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) [2021-08-26 02:25:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2021-08-26 02:25:58,444 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 18 [2021-08-26 02:25:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:58,445 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2021-08-26 02:25:58,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2021-08-26 02:25:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 02:25:58,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:58,446 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:58,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 02:25:58,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:58,665 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:25:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:58,666 INFO L82 PathProgramCache]: Analyzing trace with hash -644381054, now seen corresponding path program 1 times [2021-08-26 02:25:58,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:58,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588950087] [2021-08-26 02:25:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:58,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:58,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:58,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588950087] [2021-08-26 02:25:58,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588950087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:58,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222289173] [2021-08-26 02:25:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:58,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:58,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:58,930 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) [2021-08-26 02:25:58,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 02:25:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:59,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 02:25:59,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:59,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:25:59,110 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:25:59,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-26 02:25:59,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:25:59,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:25:59,233 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-08-26 02:25:59,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 114 [2021-08-26 02:25:59,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2021-08-26 02:25:59,260 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:25:59,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 86 [2021-08-26 02:25:59,672 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-26 02:25:59,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 52 [2021-08-26 02:25:59,678 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:25:59,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2021-08-26 02:25:59,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:25:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:59,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222289173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:59,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:59,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-26 02:25:59,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505979497] [2021-08-26 02:25:59,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 02:25:59,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 02:25:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-26 02:25:59,717 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:00,146 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-08-26 02:26:00,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 02:26:00,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-26 02:26:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:00,147 INFO L225 Difference]: With dead ends: 99 [2021-08-26 02:26:00,147 INFO L226 Difference]: Without dead ends: 97 [2021-08-26 02:26:00,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-26 02:26:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-26 02:26:00,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2021-08-26 02:26:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 76 states have internal predecessors, (93), 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) [2021-08-26 02:26:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-08-26 02:26:00,161 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 21 [2021-08-26 02:26:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:00,163 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-08-26 02:26:00,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-08-26 02:26:00,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 02:26:00,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:00,165 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:00,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:00,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:00,365 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:00,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:00,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1244226061, now seen corresponding path program 1 times [2021-08-26 02:26:00,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:00,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541622221] [2021-08-26 02:26:00,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:00,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:00,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:00,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541622221] [2021-08-26 02:26:00,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541622221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:00,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254550167] [2021-08-26 02:26:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:00,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:00,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:00,583 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) [2021-08-26 02:26:00,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 02:26:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:00,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 02:26:00,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:00,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:26:00,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:26:00,861 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:00,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:26:00,895 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-26 02:26:00,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-08-26 02:26:00,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-26 02:26:01,064 INFO L354 Elim1Store]: treesize reduction 180, result has 12.6 percent of original size [2021-08-26 02:26:01,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 51 [2021-08-26 02:26:01,079 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-26 02:26:01,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-08-26 02:26:01,202 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-08-26 02:26:01,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-08-26 02:26:01,886 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-26 02:26:01,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 25 [2021-08-26 02:26:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:01,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254550167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:01,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:01,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-26 02:26:01,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374825980] [2021-08-26 02:26:01,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 02:26:01,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 02:26:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-26 02:26:01,896 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 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) [2021-08-26 02:26:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:12,788 INFO L93 Difference]: Finished difference Result 205 states and 247 transitions. [2021-08-26 02:26:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 02:26:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 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 22 [2021-08-26 02:26:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:12,791 INFO L225 Difference]: With dead ends: 205 [2021-08-26 02:26:12,791 INFO L226 Difference]: Without dead ends: 203 [2021-08-26 02:26:12,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-08-26 02:26:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-26 02:26:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 82. [2021-08-26 02:26:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.3157894736842106) internal successors, (100), 81 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2021-08-26 02:26:12,805 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 22 [2021-08-26 02:26:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:12,806 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2021-08-26 02:26:12,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 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) [2021-08-26 02:26:12,806 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2021-08-26 02:26:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 02:26:12,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:12,807 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:12,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:13,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:13,023 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:13,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2029850711, now seen corresponding path program 1 times [2021-08-26 02:26:13,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:13,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962675683] [2021-08-26 02:26:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:13,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:13,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:13,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962675683] [2021-08-26 02:26:13,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962675683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:13,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665156178] [2021-08-26 02:26:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:13,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:13,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:13,337 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) [2021-08-26 02:26:13,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 02:26:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 02:26:13,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:13,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:26:13,615 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-26 02:26:13,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-26 02:26:13,640 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:13,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:26:13,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:13,763 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-26 02:26:13,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:13,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:13,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:26:13,919 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:26:13,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 227 treesize of output 148 [2021-08-26 02:26:13,955 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:26:13,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 183 treesize of output 132 [2021-08-26 02:26:13,990 INFO L354 Elim1Store]: treesize reduction 172, result has 16.1 percent of original size [2021-08-26 02:26:13,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 107 [2021-08-26 02:26:14,005 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:26:14,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 91 [2021-08-26 02:26:14,167 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:26:14,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 176 [2021-08-26 02:26:14,207 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:26:14,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 252 treesize of output 165 [2021-08-26 02:26:14,221 INFO L354 Elim1Store]: treesize reduction 107, result has 13.7 percent of original size [2021-08-26 02:26:14,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 160 [2021-08-26 02:26:14,578 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-26 02:26:14,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 78 [2021-08-26 02:26:14,585 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-08-26 02:26:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2021-08-26 02:26:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:14,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665156178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:14,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:14,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-26 02:26:14,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608079274] [2021-08-26 02:26:14,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 02:26:14,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:14,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 02:26:14,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:26:14,665 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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) [2021-08-26 02:26:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:15,842 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2021-08-26 02:26:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 02:26:15,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-26 02:26:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:15,845 INFO L225 Difference]: With dead ends: 201 [2021-08-26 02:26:15,846 INFO L226 Difference]: Without dead ends: 166 [2021-08-26 02:26:15,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 944.0ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-08-26 02:26:15,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-26 02:26:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 96. [2021-08-26 02:26:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.3111111111111111) internal successors, (118), 95 states have internal predecessors, (118), 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) [2021-08-26 02:26:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2021-08-26 02:26:15,866 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 25 [2021-08-26 02:26:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:15,866 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2021-08-26 02:26:15,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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) [2021-08-26 02:26:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2021-08-26 02:26:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 02:26:15,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:15,872 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:15,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:16,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:16,096 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:16,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1220504085, now seen corresponding path program 1 times [2021-08-26 02:26:16,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:16,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470474393] [2021-08-26 02:26:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:16,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-26 02:26:16,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:16,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470474393] [2021-08-26 02:26:16,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470474393] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:26:16,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:26:16,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:26:16,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151762010] [2021-08-26 02:26:16,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:26:16,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:16,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:26:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:26:16,172 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:16,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:16,256 INFO L93 Difference]: Finished difference Result 144 states and 178 transitions. [2021-08-26 02:26:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:26:16,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-26 02:26:16,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:16,258 INFO L225 Difference]: With dead ends: 144 [2021-08-26 02:26:16,258 INFO L226 Difference]: Without dead ends: 106 [2021-08-26 02:26:16,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:26:16,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-26 02:26:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2021-08-26 02:26:16,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.3010752688172043) internal successors, (121), 98 states have internal predecessors, (121), 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) [2021-08-26 02:26:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2021-08-26 02:26:16,279 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 25 [2021-08-26 02:26:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:16,279 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2021-08-26 02:26:16,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2021-08-26 02:26:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 02:26:16,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:16,282 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:16,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-26 02:26:16,282 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:16,283 INFO L82 PathProgramCache]: Analyzing trace with hash 836449433, now seen corresponding path program 1 times [2021-08-26 02:26:16,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:16,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737356243] [2021-08-26 02:26:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:16,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:16,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:16,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737356243] [2021-08-26 02:26:16,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737356243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:16,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584626825] [2021-08-26 02:26:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:16,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:16,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:16,595 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) [2021-08-26 02:26:16,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 02:26:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:16,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-26 02:26:16,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:16,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:26:16,906 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:26:16,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:16,923 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:16,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:26:16,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:17,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:26:17,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:17,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:17,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:17,202 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:26:17,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 227 treesize of output 148 [2021-08-26 02:26:17,251 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:26:17,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 183 treesize of output 132 [2021-08-26 02:26:17,280 INFO L354 Elim1Store]: treesize reduction 172, result has 16.1 percent of original size [2021-08-26 02:26:17,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 107 [2021-08-26 02:26:17,296 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:26:17,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 91 [2021-08-26 02:26:17,446 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:26:17,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 176 [2021-08-26 02:26:17,483 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:26:17,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 252 treesize of output 165 [2021-08-26 02:26:17,494 INFO L354 Elim1Store]: treesize reduction 107, result has 13.7 percent of original size [2021-08-26 02:26:17,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 160 [2021-08-26 02:26:17,993 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-26 02:26:17,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 88 [2021-08-26 02:26:18,002 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:26:18,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 43 [2021-08-26 02:26:18,057 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-26 02:26:18,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2021-08-26 02:26:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:18,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584626825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:18,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:18,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-26 02:26:18,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333775584] [2021-08-26 02:26:18,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 02:26:18,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:18,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 02:26:18,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-26 02:26:18,071 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:19,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:19,398 INFO L93 Difference]: Finished difference Result 223 states and 271 transitions. [2021-08-26 02:26:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 02:26:19,399 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-26 02:26:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:19,400 INFO L225 Difference]: With dead ends: 223 [2021-08-26 02:26:19,400 INFO L226 Difference]: Without dead ends: 221 [2021-08-26 02:26:19,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 932.8ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:26:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-26 02:26:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 110. [2021-08-26 02:26:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.3173076923076923) internal successors, (137), 109 states have internal predecessors, (137), 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) [2021-08-26 02:26:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2021-08-26 02:26:19,408 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 25 [2021-08-26 02:26:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:19,408 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2021-08-26 02:26:19,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2021-08-26 02:26:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 02:26:19,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:19,409 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:19,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:19,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:19,629 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2046348832, now seen corresponding path program 1 times [2021-08-26 02:26:19,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:19,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914296808] [2021-08-26 02:26:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:19,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:19,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:19,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914296808] [2021-08-26 02:26:19,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914296808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:19,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371546117] [2021-08-26 02:26:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:19,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:19,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:19,861 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) [2021-08-26 02:26:19,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 02:26:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:20,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-26 02:26:20,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:20,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:26:20,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:26:20,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:20,261 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-08-26 02:26:20,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-08-26 02:26:20,280 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:26:20,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-26 02:26:20,339 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-26 02:26:20,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-08-26 02:26:20,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:26:20,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-26 02:26:20,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:20,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:26:20,781 INFO L354 Elim1Store]: treesize reduction 96, result has 25.6 percent of original size [2021-08-26 02:26:20,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 52 [2021-08-26 02:26:20,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:26:20,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-26 02:26:20,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:26:20,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:26:20,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 02:26:20,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118470827] [2021-08-26 02:26:20,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 02:26:20,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 02:26:20,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-26 02:26:20,925 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:21,318 INFO L93 Difference]: Finished difference Result 229 states and 278 transitions. [2021-08-26 02:26:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 02:26:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-26 02:26:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:21,319 INFO L225 Difference]: With dead ends: 229 [2021-08-26 02:26:21,319 INFO L226 Difference]: Without dead ends: 164 [2021-08-26 02:26:21,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-08-26 02:26:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-26 02:26:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 132. [2021-08-26 02:26:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.2857142857142858) internal successors, (162), 131 states have internal predecessors, (162), 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) [2021-08-26 02:26:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2021-08-26 02:26:21,327 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 27 [2021-08-26 02:26:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:21,328 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2021-08-26 02:26:21,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2021-08-26 02:26:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 02:26:21,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:21,328 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:21,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:21,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:21,541 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:21,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash 485990957, now seen corresponding path program 1 times [2021-08-26 02:26:21,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:21,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211209277] [2021-08-26 02:26:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:21,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:21,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:21,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211209277] [2021-08-26 02:26:21,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211209277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:21,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658984864] [2021-08-26 02:26:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:21,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:21,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:21,713 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) [2021-08-26 02:26:21,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 02:26:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:22,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 02:26:22,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:22,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:26:22,125 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:26:22,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:22,143 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:26:22,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-26 02:26:22,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:22,217 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:26:22,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 65 [2021-08-26 02:26:22,221 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:26:22,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 44 [2021-08-26 02:26:22,607 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-26 02:26:22,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 65 [2021-08-26 02:26:22,620 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-26 02:26:22,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 30 [2021-08-26 02:26:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:22,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658984864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:22,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:22,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-26 02:26:22,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618442306] [2021-08-26 02:26:22,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 02:26:22,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:22,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 02:26:22,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-26 02:26:22,636 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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) [2021-08-26 02:26:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:23,004 INFO L93 Difference]: Finished difference Result 188 states and 229 transitions. [2021-08-26 02:26:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 02:26:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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 27 [2021-08-26 02:26:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:23,005 INFO L225 Difference]: With dead ends: 188 [2021-08-26 02:26:23,005 INFO L226 Difference]: Without dead ends: 152 [2021-08-26 02:26:23,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:26:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-26 02:26:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 138. [2021-08-26 02:26:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 132 states have (on average 1.2878787878787878) internal successors, (170), 137 states have internal predecessors, (170), 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) [2021-08-26 02:26:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 170 transitions. [2021-08-26 02:26:23,013 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 170 transitions. Word has length 27 [2021-08-26 02:26:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:23,013 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 170 transitions. [2021-08-26 02:26:23,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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) [2021-08-26 02:26:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 170 transitions. [2021-08-26 02:26:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:26:23,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:23,014 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:23,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:23,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:23,217 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:23,217 INFO L82 PathProgramCache]: Analyzing trace with hash 987204315, now seen corresponding path program 1 times [2021-08-26 02:26:23,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:23,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455638378] [2021-08-26 02:26:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:23,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:26:23,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:23,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455638378] [2021-08-26 02:26:23,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455638378] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:26:23,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:26:23,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:26:23,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424915121] [2021-08-26 02:26:23,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:26:23,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:26:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:26:23,275 INFO L87 Difference]: Start difference. First operand 138 states and 170 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:23,346 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2021-08-26 02:26:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:26:23,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 02:26:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:23,348 INFO L225 Difference]: With dead ends: 156 [2021-08-26 02:26:23,349 INFO L226 Difference]: Without dead ends: 154 [2021-08-26 02:26:23,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:26:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-26 02:26:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 146. [2021-08-26 02:26:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.2857142857142858) internal successors, (180), 145 states have internal predecessors, (180), 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) [2021-08-26 02:26:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 180 transitions. [2021-08-26 02:26:23,357 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 180 transitions. Word has length 28 [2021-08-26 02:26:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:23,358 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 180 transitions. [2021-08-26 02:26:23,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 180 transitions. [2021-08-26 02:26:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:26:23,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:23,360 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:23,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-26 02:26:23,361 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:23,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1044462617, now seen corresponding path program 1 times [2021-08-26 02:26:23,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:23,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730655445] [2021-08-26 02:26:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:23,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:26:23,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:23,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730655445] [2021-08-26 02:26:23,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730655445] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:26:23,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:26:23,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 02:26:23,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082378025] [2021-08-26 02:26:23,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 02:26:23,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:23,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 02:26:23,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:26:23,442 INFO L87 Difference]: Start difference. First operand 146 states and 180 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:23,595 INFO L93 Difference]: Finished difference Result 204 states and 243 transitions. [2021-08-26 02:26:23,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:26:23,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 02:26:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:23,596 INFO L225 Difference]: With dead ends: 204 [2021-08-26 02:26:23,596 INFO L226 Difference]: Without dead ends: 166 [2021-08-26 02:26:23,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:26:23,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-26 02:26:23,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 144. [2021-08-26 02:26:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 143 states have internal predecessors, (175), 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) [2021-08-26 02:26:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 175 transitions. [2021-08-26 02:26:23,606 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 175 transitions. Word has length 28 [2021-08-26 02:26:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:23,606 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 175 transitions. [2021-08-26 02:26:23,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:23,606 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 175 transitions. [2021-08-26 02:26:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 02:26:23,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:23,607 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:23,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-26 02:26:23,607 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1949280172, now seen corresponding path program 2 times [2021-08-26 02:26:23,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:23,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206322867] [2021-08-26 02:26:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:23,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:23,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:23,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206322867] [2021-08-26 02:26:23,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206322867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:23,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140388298] [2021-08-26 02:26:23,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:26:23,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:23,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:23,920 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) [2021-08-26 02:26:23,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 02:26:24,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:26:24,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:26:24,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-26 02:26:24,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:24,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:26:24,382 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:24,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:26:24,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:24,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:24,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:24,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:24,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:24,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:24,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:26:24,643 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-08-26 02:26:24,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 202 treesize of output 131 [2021-08-26 02:26:24,676 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:26:24,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 166 treesize of output 136 [2021-08-26 02:26:24,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 106 [2021-08-26 02:26:24,716 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:26:24,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 103 treesize of output 118 [2021-08-26 02:26:24,729 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-26 02:26:24,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 97 [2021-08-26 02:26:24,902 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-26 02:26:24,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 100 [2021-08-26 02:26:24,933 INFO L354 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2021-08-26 02:26:24,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 94 [2021-08-26 02:26:24,956 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-26 02:26:24,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 84 [2021-08-26 02:26:25,182 INFO L354 Elim1Store]: treesize reduction 140, result has 13.6 percent of original size [2021-08-26 02:26:25,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 370 treesize of output 184 [2021-08-26 02:26:25,234 INFO L354 Elim1Store]: treesize reduction 248, result has 12.1 percent of original size [2021-08-26 02:26:25,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 302 treesize of output 214 [2021-08-26 02:26:25,276 INFO L354 Elim1Store]: treesize reduction 354, result has 14.5 percent of original size [2021-08-26 02:26:25,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 243 treesize of output 193 [2021-08-26 02:26:25,296 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:26:25,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 168 [2021-08-26 02:26:25,536 INFO L354 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2021-08-26 02:26:25,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 434 treesize of output 150 [2021-08-26 02:26:25,559 INFO L354 Elim1Store]: treesize reduction 161, result has 8.5 percent of original size [2021-08-26 02:26:25,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 359 treesize of output 261 [2021-08-26 02:26:25,583 INFO L354 Elim1Store]: treesize reduction 220, result has 14.4 percent of original size [2021-08-26 02:26:25,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 284 treesize of output 266 [2021-08-26 02:26:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:26,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140388298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:26,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:26,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-08-26 02:26:26,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484322469] [2021-08-26 02:26:26,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:26:26,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:26:26,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:26:26,204 INFO L87 Difference]: Start difference. First operand 144 states and 175 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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) [2021-08-26 02:26:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:27,617 INFO L93 Difference]: Finished difference Result 364 states and 433 transitions. [2021-08-26 02:26:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 02:26:27,618 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-26 02:26:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:27,619 INFO L225 Difference]: With dead ends: 364 [2021-08-26 02:26:27,619 INFO L226 Difference]: Without dead ends: 303 [2021-08-26 02:26:27,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1323.0ms TimeCoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 02:26:27,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-26 02:26:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 141. [2021-08-26 02:26:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 135 states have (on average 1.2740740740740741) internal successors, (172), 140 states have internal predecessors, (172), 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) [2021-08-26 02:26:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2021-08-26 02:26:27,630 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 29 [2021-08-26 02:26:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:27,630 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2021-08-26 02:26:27,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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) [2021-08-26 02:26:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2021-08-26 02:26:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 02:26:27,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:27,631 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:27,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:27,837 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,SelfDestructingSolverStorable13 [2021-08-26 02:26:27,837 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:27,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1955841147, now seen corresponding path program 1 times [2021-08-26 02:26:27,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:27,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18995656] [2021-08-26 02:26:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:27,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:28,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:28,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18995656] [2021-08-26 02:26:28,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18995656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:28,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213257903] [2021-08-26 02:26:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:28,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:28,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:28,075 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) [2021-08-26 02:26:28,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 02:26:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:28,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 02:26:28,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:28,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-08-26 02:26:28,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-26 02:26:28,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-08-26 02:26:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-26 02:26:28,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213257903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:28,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:28,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-08-26 02:26:28,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285860874] [2021-08-26 02:26:28,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 02:26:28,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:28,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 02:26:28,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-08-26 02:26:28,763 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 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) [2021-08-26 02:26:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:30,130 INFO L93 Difference]: Finished difference Result 290 states and 348 transitions. [2021-08-26 02:26:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-26 02:26:30,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-26 02:26:30,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:30,132 INFO L225 Difference]: With dead ends: 290 [2021-08-26 02:26:30,132 INFO L226 Difference]: Without dead ends: 236 [2021-08-26 02:26:30,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 996.6ms TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 02:26:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-26 02:26:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 158. [2021-08-26 02:26:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.261437908496732) internal successors, (193), 157 states have internal predecessors, (193), 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) [2021-08-26 02:26:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 193 transitions. [2021-08-26 02:26:30,144 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 193 transitions. Word has length 29 [2021-08-26 02:26:30,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:30,144 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 193 transitions. [2021-08-26 02:26:30,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 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) [2021-08-26 02:26:30,145 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 193 transitions. [2021-08-26 02:26:30,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 02:26:30,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:30,145 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:30,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:30,358 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,SelfDestructingSolverStorable14 [2021-08-26 02:26:30,359 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:30,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:30,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1172045616, now seen corresponding path program 2 times [2021-08-26 02:26:30,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:30,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267383279] [2021-08-26 02:26:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:30,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:30,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:30,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267383279] [2021-08-26 02:26:30,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267383279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:30,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271405953] [2021-08-26 02:26:30,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:26:30,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:30,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:30,717 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) [2021-08-26 02:26:30,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 02:26:31,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:26:31,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:26:31,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-26 02:26:31,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:31,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:26:31,398 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:26:31,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:26:31,416 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:31,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:26:31,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:31,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:26:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:31,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:31,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:31,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:31,772 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-08-26 02:26:31,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 202 treesize of output 131 [2021-08-26 02:26:31,808 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:26:31,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 166 treesize of output 136 [2021-08-26 02:26:31,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 106 [2021-08-26 02:26:31,826 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-26 02:26:31,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 91 [2021-08-26 02:26:31,859 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:26:31,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 103 [2021-08-26 02:26:32,019 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-26 02:26:32,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 100 [2021-08-26 02:26:32,039 INFO L354 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2021-08-26 02:26:32,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 94 [2021-08-26 02:26:32,051 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-26 02:26:32,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 84 [2021-08-26 02:26:32,286 INFO L354 Elim1Store]: treesize reduction 140, result has 13.6 percent of original size [2021-08-26 02:26:32,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 370 treesize of output 184 [2021-08-26 02:26:32,326 INFO L354 Elim1Store]: treesize reduction 248, result has 12.1 percent of original size [2021-08-26 02:26:32,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 302 treesize of output 214 [2021-08-26 02:26:32,364 INFO L354 Elim1Store]: treesize reduction 354, result has 14.5 percent of original size [2021-08-26 02:26:32,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 243 treesize of output 193 [2021-08-26 02:26:32,383 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:26:32,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 168 [2021-08-26 02:26:32,606 INFO L354 Elim1Store]: treesize reduction 212, result has 12.0 percent of original size [2021-08-26 02:26:32,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 584 treesize of output 222 [2021-08-26 02:26:32,654 INFO L354 Elim1Store]: treesize reduction 300, result has 12.0 percent of original size [2021-08-26 02:26:32,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 465 treesize of output 273 [2021-08-26 02:26:32,684 INFO L354 Elim1Store]: treesize reduction 316, result has 10.5 percent of original size [2021-08-26 02:26:32,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 346 treesize of output 328 [2021-08-26 02:26:33,470 INFO L354 Elim1Store]: treesize reduction 65, result has 5.8 percent of original size [2021-08-26 02:26:33,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 6 case distinctions, treesize of input 336 treesize of output 135 [2021-08-26 02:26:33,478 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-08-26 02:26:33,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 68 [2021-08-26 02:26:33,554 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:26:33,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 25 [2021-08-26 02:26:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:33,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271405953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:33,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:33,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-08-26 02:26:33,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548812980] [2021-08-26 02:26:33,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-26 02:26:33,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:33,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-26 02:26:33,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-26 02:26:33,564 INFO L87 Difference]: Start difference. First operand 158 states and 193 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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) [2021-08-26 02:26:36,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:36,832 INFO L93 Difference]: Finished difference Result 300 states and 361 transitions. [2021-08-26 02:26:36,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 02:26:36,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-26 02:26:36,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:36,834 INFO L225 Difference]: With dead ends: 300 [2021-08-26 02:26:36,834 INFO L226 Difference]: Without dead ends: 298 [2021-08-26 02:26:36,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1139.4ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:26:36,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-08-26 02:26:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 155. [2021-08-26 02:26:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.2533333333333334) internal successors, (188), 154 states have internal predecessors, (188), 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) [2021-08-26 02:26:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 188 transitions. [2021-08-26 02:26:36,848 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 188 transitions. Word has length 29 [2021-08-26 02:26:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:36,848 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 188 transitions. [2021-08-26 02:26:36,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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) [2021-08-26 02:26:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 188 transitions. [2021-08-26 02:26:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 02:26:36,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:36,849 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:36,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:37,068 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,SelfDestructingSolverStorable15 [2021-08-26 02:26:37,069 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash -484292801, now seen corresponding path program 1 times [2021-08-26 02:26:37,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:37,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990380194] [2021-08-26 02:26:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:37,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:26:37,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:37,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990380194] [2021-08-26 02:26:37,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990380194] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:26:37,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:26:37,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:26:37,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477836751] [2021-08-26 02:26:37,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:26:37,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:37,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:26:37,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:26:37,109 INFO L87 Difference]: Start difference. First operand 155 states and 188 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:37,196 INFO L93 Difference]: Finished difference Result 156 states and 189 transitions. [2021-08-26 02:26:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:26:37,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-26 02:26:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:37,201 INFO L225 Difference]: With dead ends: 156 [2021-08-26 02:26:37,201 INFO L226 Difference]: Without dead ends: 149 [2021-08-26 02:26:37,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:26:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-26 02:26:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-08-26 02:26:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.25) internal successors, (180), 147 states have internal predecessors, (180), 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) [2021-08-26 02:26:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 180 transitions. [2021-08-26 02:26:37,214 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 180 transitions. Word has length 30 [2021-08-26 02:26:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:37,214 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 180 transitions. [2021-08-26 02:26:37,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 180 transitions. [2021-08-26 02:26:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 02:26:37,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:37,215 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:37,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-26 02:26:37,216 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash 871375620, now seen corresponding path program 1 times [2021-08-26 02:26:37,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:37,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85943985] [2021-08-26 02:26:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:37,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:37,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:37,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85943985] [2021-08-26 02:26:37,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85943985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:37,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556889676] [2021-08-26 02:26:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:37,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:37,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:37,497 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) [2021-08-26 02:26:37,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 02:26:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:38,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 02:26:38,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:38,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:26:38,178 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:26:38,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:38,194 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:38,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:26:38,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:38,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:38,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:38,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:38,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:38,383 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:26:38,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 104 [2021-08-26 02:26:38,408 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:26:38,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 80 [2021-08-26 02:26:38,420 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:26:38,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2021-08-26 02:26:38,541 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:26:38,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 313 treesize of output 166 [2021-08-26 02:26:38,571 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:26:38,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 147 [2021-08-26 02:26:38,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 107 [2021-08-26 02:26:39,165 INFO L354 Elim1Store]: treesize reduction 69, result has 10.4 percent of original size [2021-08-26 02:26:39,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 77 [2021-08-26 02:26:39,178 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-08-26 02:26:39,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 40 [2021-08-26 02:26:39,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-08-26 02:26:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:39,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556889676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:39,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:39,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-26 02:26:39,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704301505] [2021-08-26 02:26:39,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 02:26:39,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:39,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 02:26:39,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:26:39,209 INFO L87 Difference]: Start difference. First operand 148 states and 180 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:42,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:42,297 INFO L93 Difference]: Finished difference Result 214 states and 257 transitions. [2021-08-26 02:26:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 02:26:42,297 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-26 02:26:42,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:42,298 INFO L225 Difference]: With dead ends: 214 [2021-08-26 02:26:42,298 INFO L226 Difference]: Without dead ends: 212 [2021-08-26 02:26:42,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 810.7ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:26:42,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-26 02:26:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 157. [2021-08-26 02:26:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 153 states have (on average 1.261437908496732) internal successors, (193), 156 states have internal predecessors, (193), 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) [2021-08-26 02:26:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 193 transitions. [2021-08-26 02:26:42,312 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 193 transitions. Word has length 31 [2021-08-26 02:26:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:42,312 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 193 transitions. [2021-08-26 02:26:42,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 193 transitions. [2021-08-26 02:26:42,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 02:26:42,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:42,313 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:42,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-26 02:26:42,517 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,SelfDestructingSolverStorable17 [2021-08-26 02:26:42,517 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:42,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:42,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1992685875, now seen corresponding path program 1 times [2021-08-26 02:26:42,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:42,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795812393] [2021-08-26 02:26:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:42,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:42,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:42,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795812393] [2021-08-26 02:26:42,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795812393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:42,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642087112] [2021-08-26 02:26:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:42,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:42,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:42,672 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) [2021-08-26 02:26:42,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 02:26:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 02:26:43,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:43,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:26:43,449 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-26 02:26:43,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-26 02:26:43,472 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:43,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:26:43,548 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-26 02:26:43,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 45 [2021-08-26 02:26:44,062 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-26 02:26:44,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 337 treesize of output 236 [2021-08-26 02:26:44,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 259 [2021-08-26 02:26:44,095 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-26 02:26:44,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 256 treesize of output 258 [2021-08-26 02:26:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:44,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642087112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:44,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:44,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-26 02:26:44,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374947254] [2021-08-26 02:26:44,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 02:26:44,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 02:26:44,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:26:44,176 INFO L87 Difference]: Start difference. First operand 157 states and 193 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 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) [2021-08-26 02:26:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:46,459 INFO L93 Difference]: Finished difference Result 293 states and 343 transitions. [2021-08-26 02:26:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 02:26:46,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 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 33 [2021-08-26 02:26:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:46,460 INFO L225 Difference]: With dead ends: 293 [2021-08-26 02:26:46,460 INFO L226 Difference]: Without dead ends: 256 [2021-08-26 02:26:46,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1511.7ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 02:26:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-26 02:26:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 168. [2021-08-26 02:26:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.2439024390243902) internal successors, (204), 167 states have internal predecessors, (204), 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) [2021-08-26 02:26:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 204 transitions. [2021-08-26 02:26:46,474 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 204 transitions. Word has length 33 [2021-08-26 02:26:46,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:46,474 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 204 transitions. [2021-08-26 02:26:46,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 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) [2021-08-26 02:26:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 204 transitions. [2021-08-26 02:26:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 02:26:46,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:46,475 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:46,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:46,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:46,685 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1183339249, now seen corresponding path program 1 times [2021-08-26 02:26:46,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:46,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000616385] [2021-08-26 02:26:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:46,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:46,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:46,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000616385] [2021-08-26 02:26:46,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000616385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:46,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922342849] [2021-08-26 02:26:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:46,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:46,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:46,909 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:26:46,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 02:26:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:47,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 02:26:47,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:47,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:26:47,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:26:47,792 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-26 02:26:47,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-26 02:26:47,816 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:47,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:26:47,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:47,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2021-08-26 02:26:47,964 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-26 02:26:47,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 67 [2021-08-26 02:26:47,976 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-26 02:26:47,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-08-26 02:26:48,485 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:26:48,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 28 [2021-08-26 02:26:48,714 INFO L354 Elim1Store]: treesize reduction 178, result has 13.6 percent of original size [2021-08-26 02:26:48,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 49 [2021-08-26 02:26:48,726 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-26 02:26:48,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 45 [2021-08-26 02:26:48,804 INFO L354 Elim1Store]: treesize reduction 136, result has 20.0 percent of original size [2021-08-26 02:26:48,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 55 [2021-08-26 02:26:48,951 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-26 02:26:48,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 14 [2021-08-26 02:26:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:48,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922342849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:48,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:48,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-26 02:26:48,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689994547] [2021-08-26 02:26:48,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:26:48,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:48,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:26:48,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:26:48,963 INFO L87 Difference]: Start difference. First operand 168 states and 204 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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) [2021-08-26 02:26:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:50,343 INFO L93 Difference]: Finished difference Result 414 states and 479 transitions. [2021-08-26 02:26:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-26 02:26:50,343 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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 33 [2021-08-26 02:26:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:50,344 INFO L225 Difference]: With dead ends: 414 [2021-08-26 02:26:50,344 INFO L226 Difference]: Without dead ends: 391 [2021-08-26 02:26:50,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1065.4ms TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 02:26:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-26 02:26:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 182. [2021-08-26 02:26:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.252808988764045) internal successors, (223), 181 states have internal predecessors, (223), 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) [2021-08-26 02:26:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 223 transitions. [2021-08-26 02:26:50,360 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 223 transitions. Word has length 33 [2021-08-26 02:26:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:50,361 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 223 transitions. [2021-08-26 02:26:50,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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) [2021-08-26 02:26:50,361 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 223 transitions. [2021-08-26 02:26:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 02:26:50,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:50,362 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:50,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-26 02:26:50,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-08-26 02:26:50,573 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash 645816411, now seen corresponding path program 2 times [2021-08-26 02:26:50,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:50,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575228698] [2021-08-26 02:26:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:50,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:50,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:50,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575228698] [2021-08-26 02:26:50,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575228698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:50,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911680207] [2021-08-26 02:26:50,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:26:50,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:50,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:50,985 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:26:50,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 02:26:51,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:26:51,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:26:51,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-26 02:26:51,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:51,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:26:51,878 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:26:51,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:26:51,896 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:51,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:26:51,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:52,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:52,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:52,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:52,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:52,117 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-08-26 02:26:52,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 149 treesize of output 94 [2021-08-26 02:26:52,139 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:26:52,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 83 [2021-08-26 02:26:52,182 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:26:52,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 92 [2021-08-26 02:26:52,370 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-26 02:26:52,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 99 treesize of output 80 [2021-08-26 02:26:52,393 INFO L354 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2021-08-26 02:26:52,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 70 [2021-08-26 02:26:52,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:26:52,635 INFO L354 Elim1Store]: treesize reduction 140, result has 13.6 percent of original size [2021-08-26 02:26:52,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 359 treesize of output 177 [2021-08-26 02:26:52,687 INFO L354 Elim1Store]: treesize reduction 248, result has 12.1 percent of original size [2021-08-26 02:26:52,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 291 treesize of output 203 [2021-08-26 02:26:52,720 INFO L354 Elim1Store]: treesize reduction 252, result has 16.3 percent of original size [2021-08-26 02:26:52,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 232 treesize of output 179 [2021-08-26 02:26:52,744 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:26:52,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 157 [2021-08-26 02:26:52,932 INFO L354 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2021-08-26 02:26:52,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 423 treesize of output 143 [2021-08-26 02:26:52,953 INFO L354 Elim1Store]: treesize reduction 161, result has 8.5 percent of original size [2021-08-26 02:26:52,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 348 treesize of output 250 [2021-08-26 02:26:52,964 INFO L354 Elim1Store]: treesize reduction 119, result has 17.4 percent of original size [2021-08-26 02:26:52,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 252 [2021-08-26 02:26:53,996 INFO L354 Elim1Store]: treesize reduction 113, result has 6.6 percent of original size [2021-08-26 02:26:53,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 279 treesize of output 106 [2021-08-26 02:26:54,017 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-26 02:26:54,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 62 [2021-08-26 02:26:54,077 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-26 02:26:54,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-08-26 02:26:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:54,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911680207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:54,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:54,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-08-26 02:26:54,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077775781] [2021-08-26 02:26:54,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-26 02:26:54,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:54,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-26 02:26:54,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-26 02:26:54,085 INFO L87 Difference]: Start difference. First operand 182 states and 223 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) [2021-08-26 02:26:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:59,040 INFO L93 Difference]: Finished difference Result 391 states and 476 transitions. [2021-08-26 02:26:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-26 02:26:59,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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 35 [2021-08-26 02:26:59,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:59,047 INFO L225 Difference]: With dead ends: 391 [2021-08-26 02:26:59,047 INFO L226 Difference]: Without dead ends: 389 [2021-08-26 02:26:59,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1923.5ms TimeCoverageRelationStatistics Valid=261, Invalid=2189, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 02:26:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-08-26 02:26:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 240. [2021-08-26 02:26:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 236 states have (on average 1.271186440677966) internal successors, (300), 239 states have internal predecessors, (300), 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) [2021-08-26 02:26:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 300 transitions. [2021-08-26 02:26:59,069 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 300 transitions. Word has length 35 [2021-08-26 02:26:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:59,070 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 300 transitions. [2021-08-26 02:26:59,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) [2021-08-26 02:26:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 300 transitions. [2021-08-26 02:26:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 02:26:59,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:59,071 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:59,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:59,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:59,285 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:26:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1051861136, now seen corresponding path program 1 times [2021-08-26 02:26:59,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:59,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113735181] [2021-08-26 02:26:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:59,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:59,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:59,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113735181] [2021-08-26 02:26:59,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113735181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:59,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33766420] [2021-08-26 02:26:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:59,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:59,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:59,680 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:26:59,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 02:27:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:00,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-26 02:27:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:00,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:00,711 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:27:00,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:27:00,734 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:00,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:27:00,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:27:00,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:00,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:27:00,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:00,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:27:00,932 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-08-26 02:27:00,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 149 treesize of output 94 [2021-08-26 02:27:00,959 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:27:00,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 83 [2021-08-26 02:27:00,988 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:27:00,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 92 [2021-08-26 02:27:01,148 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-26 02:27:01,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 99 treesize of output 80 [2021-08-26 02:27:01,170 INFO L354 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2021-08-26 02:27:01,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 70 [2021-08-26 02:27:01,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:27:01,384 INFO L354 Elim1Store]: treesize reduction 164, result has 11.8 percent of original size [2021-08-26 02:27:01,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 359 treesize of output 177 [2021-08-26 02:27:01,431 INFO L354 Elim1Store]: treesize reduction 272, result has 11.1 percent of original size [2021-08-26 02:27:01,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 291 treesize of output 203 [2021-08-26 02:27:01,457 INFO L354 Elim1Store]: treesize reduction 252, result has 16.3 percent of original size [2021-08-26 02:27:01,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 232 treesize of output 179 [2021-08-26 02:27:01,483 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:27:01,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 157 [2021-08-26 02:27:01,700 INFO L354 Elim1Store]: treesize reduction 212, result has 12.0 percent of original size [2021-08-26 02:27:01,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 550 treesize of output 204 [2021-08-26 02:27:01,759 INFO L354 Elim1Store]: treesize reduction 300, result has 12.0 percent of original size [2021-08-26 02:27:01,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 431 treesize of output 259 [2021-08-26 02:27:01,771 INFO L354 Elim1Store]: treesize reduction 163, result has 13.3 percent of original size [2021-08-26 02:27:01,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 291 [2021-08-26 02:27:02,514 INFO L354 Elim1Store]: treesize reduction 109, result has 6.8 percent of original size [2021-08-26 02:27:02,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 343 treesize of output 153 [2021-08-26 02:27:02,542 INFO L354 Elim1Store]: treesize reduction 74, result has 3.9 percent of original size [2021-08-26 02:27:02,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 76 [2021-08-26 02:27:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:02,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33766420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:02,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:02,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-26 02:27:02,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005042821] [2021-08-26 02:27:02,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:27:02,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:27:02,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:27:02,663 INFO L87 Difference]: Start difference. First operand 240 states and 300 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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) [2021-08-26 02:27:08,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:08,476 INFO L93 Difference]: Finished difference Result 387 states and 471 transitions. [2021-08-26 02:27:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 02:27:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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 36 [2021-08-26 02:27:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:08,477 INFO L225 Difference]: With dead ends: 387 [2021-08-26 02:27:08,477 INFO L226 Difference]: Without dead ends: 333 [2021-08-26 02:27:08,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1486.0ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 02:27:08,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-08-26 02:27:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 261. [2021-08-26 02:27:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 257 states have (on average 1.264591439688716) internal successors, (325), 260 states have internal predecessors, (325), 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) [2021-08-26 02:27:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 325 transitions. [2021-08-26 02:27:08,510 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 325 transitions. Word has length 36 [2021-08-26 02:27:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:08,510 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 325 transitions. [2021-08-26 02:27:08,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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) [2021-08-26 02:27:08,511 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 325 transitions. [2021-08-26 02:27:08,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 02:27:08,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:08,511 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:08,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:08,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:08,714 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:27:08,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:08,714 INFO L82 PathProgramCache]: Analyzing trace with hash 353081721, now seen corresponding path program 1 times [2021-08-26 02:27:08,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:08,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607585530] [2021-08-26 02:27:08,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:08,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:08,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:08,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607585530] [2021-08-26 02:27:08,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607585530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:08,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502841131] [2021-08-26 02:27:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:08,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:08,933 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:27:08,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 02:27:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:10,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-26 02:27:10,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:10,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:10,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-08-26 02:27:10,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:10,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:10,275 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:27:10,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 110 [2021-08-26 02:27:10,292 INFO L354 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2021-08-26 02:27:10,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 79 [2021-08-26 02:27:10,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 70 [2021-08-26 02:27:10,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2021-08-26 02:27:10,540 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:27:10,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 50 [2021-08-26 02:27:10,543 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:27:10,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2021-08-26 02:27:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:27:10,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502841131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:10,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:10,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-08-26 02:27:10,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699287171] [2021-08-26 02:27:10,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 02:27:10,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:10,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 02:27:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-26 02:27:10,600 INFO L87 Difference]: Start difference. First operand 261 states and 325 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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) [2021-08-26 02:27:11,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:11,380 INFO L93 Difference]: Finished difference Result 381 states and 455 transitions. [2021-08-26 02:27:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 02:27:11,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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 36 [2021-08-26 02:27:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:11,382 INFO L225 Difference]: With dead ends: 381 [2021-08-26 02:27:11,382 INFO L226 Difference]: Without dead ends: 355 [2021-08-26 02:27:11,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 635.7ms TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 02:27:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-26 02:27:11,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 279. [2021-08-26 02:27:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 275 states have (on average 1.2472727272727273) internal successors, (343), 278 states have internal predecessors, (343), 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) [2021-08-26 02:27:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 343 transitions. [2021-08-26 02:27:11,410 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 343 transitions. Word has length 36 [2021-08-26 02:27:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:11,411 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 343 transitions. [2021-08-26 02:27:11,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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) [2021-08-26 02:27:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 343 transitions. [2021-08-26 02:27:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 02:27:11,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:11,412 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:11,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:11,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-26 02:27:11,633 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:27:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:11,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1882601568, now seen corresponding path program 1 times [2021-08-26 02:27:11,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:11,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692147634] [2021-08-26 02:27:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:11,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:27:11,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:11,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692147634] [2021-08-26 02:27:11,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692147634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:11,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968394818] [2021-08-26 02:27:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:11,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:11,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:11,712 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:27:11,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 02:27:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:12,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 02:27:12,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 02:27:12,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968394818] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:27:12,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:27:12,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-08-26 02:27:12,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909919115] [2021-08-26 02:27:12,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:27:12,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:12,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:27:12,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-26 02:27:12,996 INFO L87 Difference]: Start difference. First operand 279 states and 343 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:13,095 INFO L93 Difference]: Finished difference Result 289 states and 353 transitions. [2021-08-26 02:27:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:27:13,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-26 02:27:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:13,097 INFO L225 Difference]: With dead ends: 289 [2021-08-26 02:27:13,097 INFO L226 Difference]: Without dead ends: 278 [2021-08-26 02:27:13,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:27:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-08-26 02:27:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2021-08-26 02:27:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 272 states have (on average 1.2426470588235294) internal successors, (338), 275 states have internal predecessors, (338), 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) [2021-08-26 02:27:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 338 transitions. [2021-08-26 02:27:13,123 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 338 transitions. Word has length 37 [2021-08-26 02:27:13,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:13,123 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 338 transitions. [2021-08-26 02:27:13,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 338 transitions. [2021-08-26 02:27:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 02:27:13,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:13,124 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:13,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:13,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:13,337 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:27:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:13,337 INFO L82 PathProgramCache]: Analyzing trace with hash -412818206, now seen corresponding path program 1 times [2021-08-26 02:27:13,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:13,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281763377] [2021-08-26 02:27:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:13,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:13,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:13,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281763377] [2021-08-26 02:27:13,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281763377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:13,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099844287] [2021-08-26 02:27:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:13,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:13,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:13,757 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:27:13,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 02:27:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:15,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-26 02:27:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:15,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:27:15,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:15,080 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:15,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:27:15,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:27:15,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:15,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2021-08-26 02:27:15,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:27:15,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-26 02:27:15,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:15,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:15,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:27:15,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:15,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:15,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:27:15,352 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:27:15,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 241 treesize of output 166 [2021-08-26 02:27:15,384 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:27:15,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 197 treesize of output 142 [2021-08-26 02:27:15,424 INFO L354 Elim1Store]: treesize reduction 284, result has 12.9 percent of original size [2021-08-26 02:27:15,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 158 treesize of output 124 [2021-08-26 02:27:15,454 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:27:15,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 103 treesize of output 118 [2021-08-26 02:27:15,645 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:27:15,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 365 treesize of output 198 [2021-08-26 02:27:15,685 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:27:15,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 286 treesize of output 191 [2021-08-26 02:27:15,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:27:15,711 INFO L354 Elim1Store]: treesize reduction 150, result has 12.3 percent of original size [2021-08-26 02:27:15,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 155 [2021-08-26 02:27:16,467 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-26 02:27:16,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 83 [2021-08-26 02:27:16,473 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-26 02:27:16,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 47 [2021-08-26 02:27:16,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:27:16,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:16,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:27:16,801 INFO L354 Elim1Store]: treesize reduction 148, result has 14.9 percent of original size [2021-08-26 02:27:16,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 72 [2021-08-26 02:27:16,816 INFO L354 Elim1Store]: treesize reduction 40, result has 18.4 percent of original size [2021-08-26 02:27:16,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 63 [2021-08-26 02:27:16,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:16,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-26 02:27:16,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:16,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-26 02:27:16,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:16,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:27:16,946 INFO L354 Elim1Store]: treesize reduction 103, result has 8.0 percent of original size [2021-08-26 02:27:16,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 79 treesize of output 76 [2021-08-26 02:27:16,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:16,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:27:16,963 INFO L354 Elim1Store]: treesize reduction 103, result has 8.0 percent of original size [2021-08-26 02:27:16,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 64 treesize of output 61 [2021-08-26 02:27:17,349 INFO L354 Elim1Store]: treesize reduction 58, result has 13.4 percent of original size [2021-08-26 02:27:17,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 40 [2021-08-26 02:27:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:17,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099844287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:17,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:17,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-26 02:27:17,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910037420] [2021-08-26 02:27:17,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-26 02:27:17,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-26 02:27:17,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-26 02:27:17,356 INFO L87 Difference]: Start difference. First operand 276 states and 338 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 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) [2021-08-26 02:28:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:28:08,273 INFO L93 Difference]: Finished difference Result 506 states and 584 transitions. [2021-08-26 02:28:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-26 02:28:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 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 37 [2021-08-26 02:28:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:28:08,275 INFO L225 Difference]: With dead ends: 506 [2021-08-26 02:28:08,275 INFO L226 Difference]: Without dead ends: 483 [2021-08-26 02:28:08,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 28114.1ms TimeCoverageRelationStatistics Valid=404, Invalid=2035, Unknown=11, NotChecked=0, Total=2450 [2021-08-26 02:28:08,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-26 02:28:08,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 276. [2021-08-26 02:28:08,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 272 states have (on average 1.2426470588235294) internal successors, (338), 275 states have internal predecessors, (338), 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) [2021-08-26 02:28:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 338 transitions. [2021-08-26 02:28:08,304 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 338 transitions. Word has length 37 [2021-08-26 02:28:08,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:28:08,305 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 338 transitions. [2021-08-26 02:28:08,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 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) [2021-08-26 02:28:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 338 transitions. [2021-08-26 02:28:08,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 02:28:08,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:28:08,306 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:28:08,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 02:28:08,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:28:08,533 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:28:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:28:08,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2119521583, now seen corresponding path program 3 times [2021-08-26 02:28:08,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:28:08,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092043358] [2021-08-26 02:28:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:28:08,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:28:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:28:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:08,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:28:08,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092043358] [2021-08-26 02:28:08,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092043358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:08,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823404600] [2021-08-26 02:28:08,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:28:08,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:28:08,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:28:08,790 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:28:08,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 02:28:10,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 02:28:10,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:28:10,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-26 02:28:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:28:10,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:28:10,174 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:28:10,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:28:10,191 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:28:10,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:28:10,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:28:10,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:10,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:28:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:10,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:28:10,374 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:28:10,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 104 [2021-08-26 02:28:10,394 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:28:10,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 80 [2021-08-26 02:28:10,406 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:28:10,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 73 [2021-08-26 02:28:10,515 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:28:10,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 86 [2021-08-26 02:28:10,520 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-26 02:28:10,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 86 [2021-08-26 02:28:11,212 INFO L354 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2021-08-26 02:28:11,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 92 [2021-08-26 02:28:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:11,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823404600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:11,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:28:11,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-26 02:28:11,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163249769] [2021-08-26 02:28:11,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:28:11,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:28:11,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:28:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:28:11,293 INFO L87 Difference]: Start difference. First operand 276 states and 338 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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) [2021-08-26 02:28:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:28:25,483 INFO L93 Difference]: Finished difference Result 350 states and 422 transitions. [2021-08-26 02:28:25,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 02:28:25,483 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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 37 [2021-08-26 02:28:25,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:28:25,484 INFO L225 Difference]: With dead ends: 350 [2021-08-26 02:28:25,485 INFO L226 Difference]: Without dead ends: 313 [2021-08-26 02:28:25,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 755.1ms TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 02:28:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-26 02:28:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 282. [2021-08-26 02:28:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 278 states have (on average 1.2446043165467626) internal successors, (346), 281 states have internal predecessors, (346), 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) [2021-08-26 02:28:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 346 transitions. [2021-08-26 02:28:25,512 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 346 transitions. Word has length 37 [2021-08-26 02:28:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:28:25,512 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 346 transitions. [2021-08-26 02:28:25,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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) [2021-08-26 02:28:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 346 transitions. [2021-08-26 02:28:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-26 02:28:25,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:28:25,514 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:28:25,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-26 02:28:25,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:28:25,733 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:28:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:28:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2106582478, now seen corresponding path program 4 times [2021-08-26 02:28:25,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:28:25,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721759770] [2021-08-26 02:28:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:28:25,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:28:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:28:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:26,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:28:26,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721759770] [2021-08-26 02:28:26,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721759770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:26,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961945057] [2021-08-26 02:28:26,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:28:26,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:28:26,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:28:26,217 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:28:26,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 02:28:27,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:28:27,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:28:27,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 71 conjunts are in the unsatisfiable core [2021-08-26 02:28:27,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:28:27,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:28:27,728 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:28:27,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:28:27,748 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:28:27,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:28:27,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:28:27,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:27,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:28:27,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:27,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:28:27,993 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:28:27,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 173 treesize of output 110 [2021-08-26 02:28:28,018 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:28:28,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 86 [2021-08-26 02:28:28,042 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:28:28,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 100 [2021-08-26 02:28:28,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:28:28,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:28,184 INFO L354 Elim1Store]: treesize reduction 79, result has 12.2 percent of original size [2021-08-26 02:28:28,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 88 [2021-08-26 02:28:28,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:28,197 INFO L354 Elim1Store]: treesize reduction 79, result has 12.2 percent of original size [2021-08-26 02:28:28,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 73 [2021-08-26 02:28:28,372 INFO L354 Elim1Store]: treesize reduction 140, result has 13.6 percent of original size [2021-08-26 02:28:28,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 365 treesize of output 183 [2021-08-26 02:28:28,414 INFO L354 Elim1Store]: treesize reduction 248, result has 12.1 percent of original size [2021-08-26 02:28:28,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 297 treesize of output 209 [2021-08-26 02:28:28,441 INFO L354 Elim1Store]: treesize reduction 252, result has 16.3 percent of original size [2021-08-26 02:28:28,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 185 [2021-08-26 02:28:28,483 INFO L354 Elim1Store]: treesize reduction 138, result has 27.4 percent of original size [2021-08-26 02:28:28,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 159 treesize of output 189 [2021-08-26 02:28:28,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:28,717 INFO L354 Elim1Store]: treesize reduction 87, result has 7.4 percent of original size [2021-08-26 02:28:28,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 144 [2021-08-26 02:28:28,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:28,738 INFO L354 Elim1Store]: treesize reduction 147, result has 9.3 percent of original size [2021-08-26 02:28:28,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 175 [2021-08-26 02:28:28,750 INFO L354 Elim1Store]: treesize reduction 83, result has 23.1 percent of original size [2021-08-26 02:28:28,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 175 [2021-08-26 02:28:29,049 INFO L354 Elim1Store]: treesize reduction 230, result has 11.2 percent of original size [2021-08-26 02:28:29,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 11 case distinctions, treesize of input 792 treesize of output 263 [2021-08-26 02:28:29,111 INFO L354 Elim1Store]: treesize reduction 350, result has 10.5 percent of original size [2021-08-26 02:28:29,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 652 treesize of output 345 [2021-08-26 02:28:29,133 INFO L354 Elim1Store]: treesize reduction 460, result has 14.0 percent of original size [2021-08-26 02:28:29,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 512 treesize of output 403 [2021-08-26 02:28:29,161 INFO L354 Elim1Store]: treesize reduction 160, result has 23.4 percent of original size [2021-08-26 02:28:29,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 397 treesize of output 403 [2021-08-26 02:28:29,182 INFO L354 Elim1Store]: treesize reduction 308, result has 19.6 percent of original size [2021-08-26 02:28:29,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 379 [2021-08-26 02:28:29,442 INFO L354 Elim1Store]: treesize reduction 318, result has 10.2 percent of original size [2021-08-26 02:28:29,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 13 new quantified variables, introduced 15 case distinctions, treesize of input 1249 treesize of output 304 [2021-08-26 02:28:29,505 INFO L354 Elim1Store]: treesize reduction 422, result has 10.2 percent of original size [2021-08-26 02:28:29,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 1010 treesize of output 399 [2021-08-26 02:28:29,526 INFO L354 Elim1Store]: treesize reduction 300, result has 15.0 percent of original size [2021-08-26 02:28:29,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 435 treesize of output 413 [2021-08-26 02:28:30,899 INFO L354 Elim1Store]: treesize reduction 157, result has 9.2 percent of original size [2021-08-26 02:28:30,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 437 treesize of output 139 [2021-08-26 02:28:30,926 INFO L354 Elim1Store]: treesize reduction 150, result has 2.0 percent of original size [2021-08-26 02:28:30,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 88 [2021-08-26 02:28:30,999 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:28:30,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 25 [2021-08-26 02:28:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:31,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961945057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:31,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:28:31,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-26 02:28:31,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376937605] [2021-08-26 02:28:31,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 02:28:31,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:28:31,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 02:28:31,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-08-26 02:28:31,007 INFO L87 Difference]: Start difference. First operand 282 states and 346 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 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) [2021-08-26 02:28:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:28:41,215 INFO L93 Difference]: Finished difference Result 508 states and 623 transitions. [2021-08-26 02:28:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-26 02:28:41,215 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 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 39 [2021-08-26 02:28:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:28:41,217 INFO L225 Difference]: With dead ends: 508 [2021-08-26 02:28:41,217 INFO L226 Difference]: Without dead ends: 506 [2021-08-26 02:28:41,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 3489.0ms TimeCoverageRelationStatistics Valid=285, Invalid=2264, Unknown=1, NotChecked=0, Total=2550 [2021-08-26 02:28:41,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-26 02:28:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 337. [2021-08-26 02:28:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 333 states have (on average 1.2612612612612613) internal successors, (420), 336 states have internal predecessors, (420), 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) [2021-08-26 02:28:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 420 transitions. [2021-08-26 02:28:41,242 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 420 transitions. Word has length 39 [2021-08-26 02:28:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:28:41,242 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 420 transitions. [2021-08-26 02:28:41,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 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) [2021-08-26 02:28:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 420 transitions. [2021-08-26 02:28:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-26 02:28:41,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:28:41,242 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:28:41,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 02:28:41,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-26 02:28:41,443 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:28:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:28:41,444 INFO L82 PathProgramCache]: Analyzing trace with hash 113709595, now seen corresponding path program 2 times [2021-08-26 02:28:41,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:28:41,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073571997] [2021-08-26 02:28:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:28:41,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:28:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:28:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:41,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:28:41,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073571997] [2021-08-26 02:28:41,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073571997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:41,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669785341] [2021-08-26 02:28:41,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:28:41,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:28:41,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:28:41,912 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:28:41,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 02:28:43,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:28:43,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:28:43,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-26 02:28:43,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:28:43,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:28:43,590 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:28:43,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:28:43,610 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:28:43,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:28:43,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:28:43,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:43,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:28:43,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:43,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:28:43,789 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:28:43,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 173 treesize of output 110 [2021-08-26 02:28:43,812 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:28:43,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 86 [2021-08-26 02:28:43,836 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:28:43,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 100 [2021-08-26 02:28:43,972 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-08-26 02:28:43,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 107 treesize of output 88 [2021-08-26 02:28:43,991 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-08-26 02:28:43,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 73 [2021-08-26 02:28:44,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:28:44,180 INFO L354 Elim1Store]: treesize reduction 204, result has 11.3 percent of original size [2021-08-26 02:28:44,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 469 treesize of output 215 [2021-08-26 02:28:44,225 INFO L354 Elim1Store]: treesize reduction 204, result has 11.3 percent of original size [2021-08-26 02:28:44,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 377 treesize of output 215 [2021-08-26 02:28:44,263 INFO L354 Elim1Store]: treesize reduction 252, result has 16.3 percent of original size [2021-08-26 02:28:44,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 185 [2021-08-26 02:28:44,302 INFO L354 Elim1Store]: treesize reduction 138, result has 27.4 percent of original size [2021-08-26 02:28:44,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 159 treesize of output 189 [2021-08-26 02:28:44,505 INFO L354 Elim1Store]: treesize reduction 150, result has 12.8 percent of original size [2021-08-26 02:28:44,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 214 treesize of output 144 [2021-08-26 02:28:44,538 INFO L354 Elim1Store]: treesize reduction 222, result has 13.3 percent of original size [2021-08-26 02:28:44,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 195 treesize of output 175 [2021-08-26 02:28:44,550 INFO L354 Elim1Store]: treesize reduction 83, result has 23.1 percent of original size [2021-08-26 02:28:44,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 175 [2021-08-26 02:28:44,823 INFO L354 Elim1Store]: treesize reduction 230, result has 11.2 percent of original size [2021-08-26 02:28:44,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 11 case distinctions, treesize of input 769 treesize of output 252 [2021-08-26 02:28:44,883 INFO L354 Elim1Store]: treesize reduction 350, result has 10.5 percent of original size [2021-08-26 02:28:44,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 629 treesize of output 342 [2021-08-26 02:28:44,905 INFO L354 Elim1Store]: treesize reduction 460, result has 14.0 percent of original size [2021-08-26 02:28:44,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 489 treesize of output 380 [2021-08-26 02:28:44,929 INFO L354 Elim1Store]: treesize reduction 308, result has 19.6 percent of original size [2021-08-26 02:28:44,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 374 treesize of output 365 [2021-08-26 02:28:44,957 INFO L354 Elim1Store]: treesize reduction 160, result has 23.4 percent of original size [2021-08-26 02:28:44,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 359 treesize of output 365 [2021-08-26 02:28:45,274 INFO L354 Elim1Store]: treesize reduction 164, result has 8.4 percent of original size [2021-08-26 02:28:45,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 11 new quantified variables, introduced 12 case distinctions, treesize of input 960 treesize of output 201 [2021-08-26 02:28:45,310 INFO L354 Elim1Store]: treesize reduction 268, result has 7.9 percent of original size [2021-08-26 02:28:45,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 813 treesize of output 420 [2021-08-26 02:28:45,333 INFO L354 Elim1Store]: treesize reduction 476, result has 13.6 percent of original size [2021-08-26 02:28:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 666 treesize of output 624 [2021-08-26 02:28:46,827 INFO L354 Elim1Store]: treesize reduction 412, result has 0.7 percent of original size [2021-08-26 02:28:46,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 633 treesize of output 492 [2021-08-26 02:28:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:46,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669785341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:46,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:28:46,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-08-26 02:28:46,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771024528] [2021-08-26 02:28:46,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-26 02:28:46,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:28:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-26 02:28:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-26 02:28:46,965 INFO L87 Difference]: Start difference. First operand 337 states and 420 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 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) [2021-08-26 02:28:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:28:58,606 INFO L93 Difference]: Finished difference Result 505 states and 608 transitions. [2021-08-26 02:28:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-26 02:28:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 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 40 [2021-08-26 02:28:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:28:58,608 INFO L225 Difference]: With dead ends: 505 [2021-08-26 02:28:58,608 INFO L226 Difference]: Without dead ends: 454 [2021-08-26 02:28:58,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 5158.4ms TimeCoverageRelationStatistics Valid=249, Invalid=2103, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 02:28:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-26 02:28:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 313. [2021-08-26 02:28:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 309 states have (on average 1.2588996763754046) internal successors, (389), 312 states have internal predecessors, (389), 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) [2021-08-26 02:28:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 389 transitions. [2021-08-26 02:28:58,643 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 389 transitions. Word has length 40 [2021-08-26 02:28:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:28:58,643 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 389 transitions. [2021-08-26 02:28:58,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 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) [2021-08-26 02:28:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 389 transitions. [2021-08-26 02:28:58,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-26 02:28:58,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:28:58,644 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:28:58,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 02:28:58,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-26 02:28:58,869 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:28:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:28:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1237823303, now seen corresponding path program 1 times [2021-08-26 02:28:58,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:28:58,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506883838] [2021-08-26 02:28:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:28:58,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:28:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:28:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:59,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:28:59,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506883838] [2021-08-26 02:28:59,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506883838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:59,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408445898] [2021-08-26 02:28:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:28:59,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:28:59,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:28:59,230 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:28:59,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 02:29:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:29:01,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-26 02:29:01,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:29:01,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:29:01,097 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:29:01,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:29:01,111 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:29:01,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:29:01,131 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:29:01,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:29:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:01,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:29:01,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:01,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:29:01,327 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-08-26 02:29:01,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 149 treesize of output 94 [2021-08-26 02:29:01,349 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:29:01,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 83 [2021-08-26 02:29:01,373 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:29:01,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 92 [2021-08-26 02:29:01,549 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-26 02:29:01,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 99 treesize of output 80 [2021-08-26 02:29:01,568 INFO L354 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2021-08-26 02:29:01,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 70 [2021-08-26 02:29:01,688 INFO L354 Elim1Store]: treesize reduction 164, result has 11.8 percent of original size [2021-08-26 02:29:01,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 264 treesize of output 126 [2021-08-26 02:29:01,728 INFO L354 Elim1Store]: treesize reduction 272, result has 11.1 percent of original size [2021-08-26 02:29:01,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 196 treesize of output 132 [2021-08-26 02:29:01,746 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:29:01,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 132 [2021-08-26 02:29:01,915 INFO L354 Elim1Store]: treesize reduction 212, result has 12.0 percent of original size [2021-08-26 02:29:01,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 525 treesize of output 191 [2021-08-26 02:29:01,957 INFO L354 Elim1Store]: treesize reduction 300, result has 12.0 percent of original size [2021-08-26 02:29:01,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 406 treesize of output 242 [2021-08-26 02:29:01,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 263 [2021-08-26 02:29:03,116 INFO L354 Elim1Store]: treesize reduction 182, result has 5.7 percent of original size [2021-08-26 02:29:03,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 13 new quantified variables, introduced 15 case distinctions, treesize of input 325 treesize of output 132 [2021-08-26 02:29:03,148 INFO L354 Elim1Store]: treesize reduction 162, result has 4.1 percent of original size [2021-08-26 02:29:03,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 61 [2021-08-26 02:29:03,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-08-26 02:29:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:03,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408445898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:03,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:29:03,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-26 02:29:03,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255163819] [2021-08-26 02:29:03,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 02:29:03,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:29:03,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 02:29:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:29:03,185 INFO L87 Difference]: Start difference. First operand 313 states and 389 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:29:13,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:29:13,256 INFO L93 Difference]: Finished difference Result 466 states and 571 transitions. [2021-08-26 02:29:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 02:29:13,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-26 02:29:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:29:13,258 INFO L225 Difference]: With dead ends: 466 [2021-08-26 02:29:13,258 INFO L226 Difference]: Without dead ends: 464 [2021-08-26 02:29:13,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1226.5ms TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 02:29:13,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-26 02:29:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 341. [2021-08-26 02:29:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 337 states have (on average 1.2522255192878338) internal successors, (422), 340 states have internal predecessors, (422), 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) [2021-08-26 02:29:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 422 transitions. [2021-08-26 02:29:13,285 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 422 transitions. Word has length 42 [2021-08-26 02:29:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:29:13,285 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 422 transitions. [2021-08-26 02:29:13,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:29:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 422 transitions. [2021-08-26 02:29:13,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-26 02:29:13,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:29:13,286 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:29:13,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-26 02:29:13,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-26 02:29:13,487 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:29:13,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:29:13,487 INFO L82 PathProgramCache]: Analyzing trace with hash -495893718, now seen corresponding path program 1 times [2021-08-26 02:29:13,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:29:13,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860932490] [2021-08-26 02:29:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:29:13,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:29:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:29:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:13,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:29:13,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860932490] [2021-08-26 02:29:13,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860932490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:13,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649939282] [2021-08-26 02:29:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:29:13,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:29:13,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:29:13,913 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:29:13,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 02:29:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:29:15,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-26 02:29:15,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:29:15,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:29:15,899 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:29:15,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:29:15,915 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:29:15,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:29:15,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:29:16,029 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:29:16,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 70 [2021-08-26 02:29:16,034 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:29:16,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 53 [2021-08-26 02:29:16,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:16,768 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-08-26 02:29:16,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 41 [2021-08-26 02:29:16,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:16,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:29:16,787 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-08-26 02:29:16,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 22 [2021-08-26 02:29:16,814 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-26 02:29:16,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-26 02:29:16,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2021-08-26 02:29:16,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-08-26 02:29:16,917 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-26 02:29:16,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 147 treesize of output 104 [2021-08-26 02:29:16,936 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-08-26 02:29:16,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 157 treesize of output 147 [2021-08-26 02:29:16,941 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-26 02:29:16,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 117 [2021-08-26 02:29:17,310 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-08-26 02:29:17,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 67 [2021-08-26 02:29:17,315 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:29:17,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 39 [2021-08-26 02:29:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:17,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649939282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:17,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:29:17,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-26 02:29:17,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039062013] [2021-08-26 02:29:17,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 02:29:17,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:29:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 02:29:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:29:17,393 INFO L87 Difference]: Start difference. First operand 341 states and 422 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:29:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:29:18,569 INFO L93 Difference]: Finished difference Result 416 states and 500 transitions. [2021-08-26 02:29:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 02:29:18,569 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-26 02:29:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:29:18,571 INFO L225 Difference]: With dead ends: 416 [2021-08-26 02:29:18,571 INFO L226 Difference]: Without dead ends: 391 [2021-08-26 02:29:18,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1205.9ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 02:29:18,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-26 02:29:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 336. [2021-08-26 02:29:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 332 states have (on average 1.2560240963855422) internal successors, (417), 335 states have internal predecessors, (417), 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) [2021-08-26 02:29:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 417 transitions. [2021-08-26 02:29:18,609 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 417 transitions. Word has length 42 [2021-08-26 02:29:18,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:29:18,609 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 417 transitions. [2021-08-26 02:29:18,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:29:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 417 transitions. [2021-08-26 02:29:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-26 02:29:18,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:29:18,610 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:29:18,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 02:29:18,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:29:18,813 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:29:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:29:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash 370274383, now seen corresponding path program 1 times [2021-08-26 02:29:18,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:29:18,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348533227] [2021-08-26 02:29:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:29:18,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:29:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:29:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:19,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:29:19,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348533227] [2021-08-26 02:29:19,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348533227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:19,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971661740] [2021-08-26 02:29:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:29:19,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:29:19,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:29:19,087 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:29:19,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 02:29:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:29:21,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-26 02:29:21,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:29:21,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:29:21,221 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:29:21,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:29:21,242 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-26 02:29:21,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-26 02:29:21,262 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:29:21,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:29:21,354 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-26 02:29:21,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:29:21,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:21,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:29:21,437 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:29:21,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 166 treesize of output 103 [2021-08-26 02:29:21,461 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:29:21,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 122 treesize of output 83 [2021-08-26 02:29:21,484 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:29:21,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 93 [2021-08-26 02:29:21,625 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:29:21,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 291 treesize of output 152 [2021-08-26 02:29:21,652 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:29:21,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 145 [2021-08-26 02:29:22,735 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-08-26 02:29:22,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 385 treesize of output 182 [2021-08-26 02:29:22,782 INFO L354 Elim1Store]: treesize reduction 204, result has 12.4 percent of original size [2021-08-26 02:29:22,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 159 treesize of output 158 [2021-08-26 02:29:22,791 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-08-26 02:29:22,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 139 [2021-08-26 02:29:22,810 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-08-26 02:29:22,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 131 [2021-08-26 02:29:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:22,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971661740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:22,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:29:22,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-08-26 02:29:22,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394892834] [2021-08-26 02:29:22,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 02:29:22,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:29:22,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 02:29:22,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-26 02:29:22,846 INFO L87 Difference]: Start difference. First operand 336 states and 417 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 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) [2021-08-26 02:29:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:29:42,376 INFO L93 Difference]: Finished difference Result 579 states and 673 transitions. [2021-08-26 02:29:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-26 02:29:42,376 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 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 43 [2021-08-26 02:29:42,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:29:42,377 INFO L225 Difference]: With dead ends: 579 [2021-08-26 02:29:42,377 INFO L226 Difference]: Without dead ends: 532 [2021-08-26 02:29:42,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1831.1ms TimeCoverageRelationStatistics Valid=525, Invalid=2667, Unknown=0, NotChecked=0, Total=3192 [2021-08-26 02:29:42,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-26 02:29:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 347. [2021-08-26 02:29:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 343 states have (on average 1.2478134110787171) internal successors, (428), 346 states have internal predecessors, (428), 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) [2021-08-26 02:29:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 428 transitions. [2021-08-26 02:29:42,417 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 428 transitions. Word has length 43 [2021-08-26 02:29:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:29:42,417 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 428 transitions. [2021-08-26 02:29:42,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 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) [2021-08-26 02:29:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 428 transitions. [2021-08-26 02:29:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-26 02:29:42,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:29:42,418 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:29:42,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-26 02:29:42,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:29:42,637 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:29:42,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:29:42,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1179621009, now seen corresponding path program 1 times [2021-08-26 02:29:42,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:29:42,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696035541] [2021-08-26 02:29:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:29:42,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:29:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:29:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:43,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:29:43,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696035541] [2021-08-26 02:29:43,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696035541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:43,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150090070] [2021-08-26 02:29:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:29:43,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:29:43,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:29:43,085 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:29:43,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 02:29:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:29:45,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-26 02:29:45,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:29:45,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:29:45,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:29:45,394 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:29:45,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:29:45,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:29:45,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:45,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2021-08-26 02:29:45,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:29:45,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-26 02:29:45,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:45,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:29:45,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:45,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:29:45,665 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-08-26 02:29:45,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 136 [2021-08-26 02:29:45,693 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:29:45,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 137 [2021-08-26 02:29:45,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:45,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:29:45,699 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:29:45,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 110 [2021-08-26 02:29:45,723 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:29:45,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 119 [2021-08-26 02:29:45,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:29:45,742 INFO L354 Elim1Store]: treesize reduction 86, result has 19.6 percent of original size [2021-08-26 02:29:45,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 101 [2021-08-26 02:29:45,911 INFO L354 Elim1Store]: treesize reduction 126, result has 14.9 percent of original size [2021-08-26 02:29:45,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 279 treesize of output 160 [2021-08-26 02:29:45,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:29:45,931 INFO L354 Elim1Store]: treesize reduction 150, result has 12.3 percent of original size [2021-08-26 02:29:45,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 220 treesize of output 214 [2021-08-26 02:29:45,959 INFO L354 Elim1Store]: treesize reduction 214, result has 13.7 percent of original size [2021-08-26 02:29:45,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 179 [2021-08-26 02:29:46,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:46,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 45 [2021-08-26 02:29:46,986 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-26 02:29:46,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 47 [2021-08-26 02:29:47,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:29:47,293 INFO L354 Elim1Store]: treesize reduction 262, result has 11.8 percent of original size [2021-08-26 02:29:47,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 68 [2021-08-26 02:29:47,310 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-08-26 02:29:47,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 63 [2021-08-26 02:29:47,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:29:47,472 INFO L354 Elim1Store]: treesize reduction 200, result has 17.0 percent of original size [2021-08-26 02:29:47,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 73 [2021-08-26 02:29:47,739 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-08-26 02:29:47,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-08-26 02:29:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:47,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150090070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:47,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:29:47,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-08-26 02:29:47,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213707012] [2021-08-26 02:29:47,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 02:29:47,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:29:47,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 02:29:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-08-26 02:29:47,757 INFO L87 Difference]: Start difference. First operand 347 states and 428 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 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) [2021-08-26 02:30:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:30:06,211 INFO L93 Difference]: Finished difference Result 710 states and 824 transitions. [2021-08-26 02:30:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-26 02:30:06,212 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 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 43 [2021-08-26 02:30:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:30:06,213 INFO L225 Difference]: With dead ends: 710 [2021-08-26 02:30:06,214 INFO L226 Difference]: Without dead ends: 692 [2021-08-26 02:30:06,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 5374.1ms TimeCoverageRelationStatistics Valid=564, Invalid=3095, Unknown=1, NotChecked=0, Total=3660 [2021-08-26 02:30:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-08-26 02:30:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 395. [2021-08-26 02:30:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 391 states have (on average 1.2506393861892584) internal successors, (489), 394 states have internal predecessors, (489), 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) [2021-08-26 02:30:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 489 transitions. [2021-08-26 02:30:06,251 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 489 transitions. Word has length 43 [2021-08-26 02:30:06,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:30:06,252 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 489 transitions. [2021-08-26 02:30:06,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 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) [2021-08-26 02:30:06,252 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 489 transitions. [2021-08-26 02:30:06,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 02:30:06,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:30:06,253 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:30:06,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-26 02:30:06,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-26 02:30:06,462 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:30:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:30:06,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1292700252, now seen corresponding path program 1 times [2021-08-26 02:30:06,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:30:06,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063734382] [2021-08-26 02:30:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:06,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:30:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:06,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:30:06,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063734382] [2021-08-26 02:30:06,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063734382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:06,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650915377] [2021-08-26 02:30:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:06,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:30:06,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:30:06,875 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:30:06,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 02:30:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:09,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-26 02:30:09,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:30:09,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:30:09,324 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:30:09,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:30:09,338 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:30:09,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:30:09,357 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:30:09,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:30:09,449 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:30:09,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 81 [2021-08-26 02:30:09,454 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:30:09,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 72 [2021-08-26 02:30:09,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2021-08-26 02:30:09,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:09,979 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:30:09,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 122 [2021-08-26 02:30:10,002 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-08-26 02:30:10,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 118 [2021-08-26 02:30:10,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:10,027 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-08-26 02:30:10,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 117 [2021-08-26 02:30:10,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:30:10,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:10,040 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-08-26 02:30:10,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 94 [2021-08-26 02:30:10,054 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:30:10,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 93 [2021-08-26 02:30:10,191 INFO L354 Elim1Store]: treesize reduction 74, result has 16.9 percent of original size [2021-08-26 02:30:10,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 147 [2021-08-26 02:30:10,196 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-26 02:30:10,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 195 [2021-08-26 02:30:10,218 INFO L354 Elim1Store]: treesize reduction 174, result has 13.4 percent of original size [2021-08-26 02:30:10,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 189 treesize of output 147 [2021-08-26 02:30:10,222 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-26 02:30:10,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 129 [2021-08-26 02:30:13,081 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-08-26 02:30:13,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 78 [2021-08-26 02:30:13,094 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-08-26 02:30:13,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 49 [2021-08-26 02:30:13,158 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:30:13,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-08-26 02:30:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:13,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650915377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:13,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:30:13,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-26 02:30:13,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145483769] [2021-08-26 02:30:13,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:30:13,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:30:13,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:30:13,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=362, Unknown=1, NotChecked=0, Total=420 [2021-08-26 02:30:13,165 INFO L87 Difference]: Start difference. First operand 395 states and 489 transitions. Second operand has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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) [2021-08-26 02:30:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:30:26,613 INFO L93 Difference]: Finished difference Result 511 states and 607 transitions. [2021-08-26 02:30:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-26 02:30:26,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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 44 [2021-08-26 02:30:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:30:26,614 INFO L225 Difference]: With dead ends: 511 [2021-08-26 02:30:26,614 INFO L226 Difference]: Without dead ends: 509 [2021-08-26 02:30:26,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 5526.8ms TimeCoverageRelationStatistics Valid=263, Invalid=1716, Unknown=1, NotChecked=0, Total=1980 [2021-08-26 02:30:26,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-26 02:30:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 423. [2021-08-26 02:30:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 419 states have (on average 1.2362768496420047) internal successors, (518), 422 states have internal predecessors, (518), 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) [2021-08-26 02:30:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 518 transitions. [2021-08-26 02:30:26,651 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 518 transitions. Word has length 44 [2021-08-26 02:30:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:30:26,651 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 518 transitions. [2021-08-26 02:30:26,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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) [2021-08-26 02:30:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 518 transitions. [2021-08-26 02:30:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 02:30:26,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:30:26,653 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:30:26,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-26 02:30:26,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-26 02:30:26,854 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:30:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:30:26,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1371615178, now seen corresponding path program 1 times [2021-08-26 02:30:26,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:30:26,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286873747] [2021-08-26 02:30:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:26,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:30:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-26 02:30:26,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:30:26,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286873747] [2021-08-26 02:30:26,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286873747] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:30:26,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:30:26,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:30:26,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982639388] [2021-08-26 02:30:26,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:30:26,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:30:26,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:30:26,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:30:26,898 INFO L87 Difference]: Start difference. First operand 423 states and 518 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:30:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:30:27,063 INFO L93 Difference]: Finished difference Result 424 states and 519 transitions. [2021-08-26 02:30:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:30:27,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-26 02:30:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:30:27,065 INFO L225 Difference]: With dead ends: 424 [2021-08-26 02:30:27,065 INFO L226 Difference]: Without dead ends: 422 [2021-08-26 02:30:27,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:30:27,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-26 02:30:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 417. [2021-08-26 02:30:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 414 states have (on average 1.2367149758454106) internal successors, (512), 416 states have internal predecessors, (512), 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) [2021-08-26 02:30:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 512 transitions. [2021-08-26 02:30:27,112 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 512 transitions. Word has length 46 [2021-08-26 02:30:27,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:30:27,112 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 512 transitions. [2021-08-26 02:30:27,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:30:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 512 transitions. [2021-08-26 02:30:27,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 02:30:27,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:30:27,113 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:30:27,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-26 02:30:27,114 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:30:27,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:30:27,114 INFO L82 PathProgramCache]: Analyzing trace with hash 788146359, now seen corresponding path program 1 times [2021-08-26 02:30:27,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:30:27,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723017457] [2021-08-26 02:30:27,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:27,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:30:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:27,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:30:27,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723017457] [2021-08-26 02:30:27,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723017457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:27,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273278578] [2021-08-26 02:30:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:27,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:30:27,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:30:27,814 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:30:27,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 02:30:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:30,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-26 02:30:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:30:30,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:30:30,422 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:30:30,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:30:30,441 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:30:30,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:30:30,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:30:30,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:30,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:30:30,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:30,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:30:30,630 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:30:30,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 173 treesize of output 110 [2021-08-26 02:30:30,654 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:30:30,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 86 [2021-08-26 02:30:30,678 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:30:30,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 100 [2021-08-26 02:30:30,825 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:30:30,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 290 treesize of output 155 [2021-08-26 02:30:30,853 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:30:30,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 140 [2021-08-26 02:30:31,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:31,867 INFO L354 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2021-08-26 02:30:31,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-08-26 02:30:31,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:31,902 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-08-26 02:30:31,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 188 treesize of output 135 [2021-08-26 02:30:31,937 INFO L354 Elim1Store]: treesize reduction 108, result has 19.4 percent of original size [2021-08-26 02:30:31,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 125 [2021-08-26 02:30:31,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:31,979 INFO L354 Elim1Store]: treesize reduction 158, result has 14.1 percent of original size [2021-08-26 02:30:31,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 119 [2021-08-26 02:30:32,002 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-08-26 02:30:32,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 110 [2021-08-26 02:30:32,277 INFO L354 Elim1Store]: treesize reduction 326, result has 7.1 percent of original size [2021-08-26 02:30:32,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 353 treesize of output 222 [2021-08-26 02:30:32,361 INFO L354 Elim1Store]: treesize reduction 342, result has 6.8 percent of original size [2021-08-26 02:30:32,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 471 treesize of output 299 [2021-08-26 02:30:32,377 INFO L354 Elim1Store]: treesize reduction 77, result has 16.3 percent of original size [2021-08-26 02:30:32,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 303 treesize of output 249 [2021-08-26 02:30:32,918 INFO L354 Elim1Store]: treesize reduction 48, result has 21.3 percent of original size [2021-08-26 02:30:32,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 106 [2021-08-26 02:30:32,925 INFO L354 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2021-08-26 02:30:32,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 63 [2021-08-26 02:30:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:33,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273278578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:33,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:30:33,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-08-26 02:30:33,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325091390] [2021-08-26 02:30:33,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 02:30:33,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:30:33,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 02:30:33,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-08-26 02:30:33,024 INFO L87 Difference]: Start difference. First operand 417 states and 512 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 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) [2021-08-26 02:30:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:30:36,543 INFO L93 Difference]: Finished difference Result 739 states and 861 transitions. [2021-08-26 02:30:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-26 02:30:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 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 46 [2021-08-26 02:30:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:30:36,546 INFO L225 Difference]: With dead ends: 739 [2021-08-26 02:30:36,546 INFO L226 Difference]: Without dead ends: 716 [2021-08-26 02:30:36,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2846.5ms TimeCoverageRelationStatistics Valid=626, Invalid=3664, Unknown=0, NotChecked=0, Total=4290 [2021-08-26 02:30:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-08-26 02:30:36,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 420. [2021-08-26 02:30:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 417 states have (on average 1.2446043165467626) internal successors, (519), 419 states have internal predecessors, (519), 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) [2021-08-26 02:30:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 519 transitions. [2021-08-26 02:30:36,599 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 519 transitions. Word has length 46 [2021-08-26 02:30:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:30:36,599 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 519 transitions. [2021-08-26 02:30:36,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 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) [2021-08-26 02:30:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 519 transitions. [2021-08-26 02:30:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 02:30:36,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:30:36,601 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:30:36,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-26 02:30:36,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-26 02:30:36,817 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:30:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:30:36,817 INFO L82 PathProgramCache]: Analyzing trace with hash 728886081, now seen corresponding path program 3 times [2021-08-26 02:30:36,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:30:36,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618521708] [2021-08-26 02:30:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:36,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:30:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:37,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:30:37,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618521708] [2021-08-26 02:30:37,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618521708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:37,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407667920] [2021-08-26 02:30:37,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:30:37,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:30:37,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:30:37,417 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:30:37,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-26 02:30:40,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-26 02:30:40,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:30:40,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 85 conjunts are in the unsatisfiable core [2021-08-26 02:30:40,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:30:40,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:30:40,310 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:30:40,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:30:40,337 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:30:40,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:30:40,365 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:30:40,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:30:40,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:40,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:30:40,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:40,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:30:40,538 INFO L354 Elim1Store]: treesize reduction 58, result has 20.5 percent of original size [2021-08-26 02:30:40,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 149 treesize of output 94 [2021-08-26 02:30:40,557 INFO L354 Elim1Store]: treesize reduction 82, result has 18.8 percent of original size [2021-08-26 02:30:40,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 83 [2021-08-26 02:30:40,581 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:30:40,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 92 [2021-08-26 02:30:40,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:40,730 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 02:30:40,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 80 [2021-08-26 02:30:40,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:40,736 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:30:40,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 70 [2021-08-26 02:30:40,858 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-08-26 02:30:40,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 233 treesize of output 120 [2021-08-26 02:30:40,890 INFO L354 Elim1Store]: treesize reduction 216, result has 13.6 percent of original size [2021-08-26 02:30:40,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 181 treesize of output 138 [2021-08-26 02:30:40,929 INFO L354 Elim1Store]: treesize reduction 138, result has 27.4 percent of original size [2021-08-26 02:30:40,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 129 treesize of output 159 [2021-08-26 02:30:41,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:30:41,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:41,105 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-26 02:30:41,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 143 treesize of output 106 [2021-08-26 02:30:41,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:41,128 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-08-26 02:30:41,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 124 treesize of output 117 [2021-08-26 02:30:41,398 INFO L354 Elim1Store]: treesize reduction 210, result has 12.1 percent of original size [2021-08-26 02:30:41,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 11 case distinctions, treesize of input 526 treesize of output 210 [2021-08-26 02:30:41,454 INFO L354 Elim1Store]: treesize reduction 474, result has 10.1 percent of original size [2021-08-26 02:30:41,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 434 treesize of output 297 [2021-08-26 02:30:41,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 232 [2021-08-26 02:30:41,485 INFO L354 Elim1Store]: treesize reduction 136, result has 23.2 percent of original size [2021-08-26 02:30:41,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 229 treesize of output 235 [2021-08-26 02:30:41,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 208 [2021-08-26 02:30:41,709 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-08-26 02:30:41,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 391 treesize of output 146 [2021-08-26 02:30:41,720 INFO L354 Elim1Store]: treesize reduction 85, result has 18.3 percent of original size [2021-08-26 02:30:41,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 311 [2021-08-26 02:30:41,724 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-08-26 02:30:41,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 308 treesize of output 260 [2021-08-26 02:30:51,336 INFO L354 Elim1Store]: treesize reduction 202, result has 13.3 percent of original size [2021-08-26 02:30:51,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 271 treesize of output 157 [2021-08-26 02:30:51,359 INFO L354 Elim1Store]: treesize reduction 63, result has 16.0 percent of original size [2021-08-26 02:30:51,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 112 [2021-08-26 02:30:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:51,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407667920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:51,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:30:51,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-26 02:30:51,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566215022] [2021-08-26 02:30:51,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-26 02:30:51,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:30:51,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-26 02:30:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=775, Unknown=3, NotChecked=0, Total=870 [2021-08-26 02:30:51,501 INFO L87 Difference]: Start difference. First operand 420 states and 519 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 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) [2021-08-26 02:31:44,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:31:44,243 INFO L93 Difference]: Finished difference Result 572 states and 687 transitions. [2021-08-26 02:31:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 02:31:44,244 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 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 47 [2021-08-26 02:31:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:31:44,245 INFO L225 Difference]: With dead ends: 572 [2021-08-26 02:31:44,245 INFO L226 Difference]: Without dead ends: 537 [2021-08-26 02:31:44,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 12343.9ms TimeCoverageRelationStatistics Valid=187, Invalid=1616, Unknown=3, NotChecked=0, Total=1806 [2021-08-26 02:31:44,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-08-26 02:31:44,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 447. [2021-08-26 02:31:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 444 states have (on average 1.240990990990991) internal successors, (551), 446 states have internal predecessors, (551), 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) [2021-08-26 02:31:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 551 transitions. [2021-08-26 02:31:44,286 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 551 transitions. Word has length 47 [2021-08-26 02:31:44,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:31:44,286 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 551 transitions. [2021-08-26 02:31:44,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 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) [2021-08-26 02:31:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 551 transitions. [2021-08-26 02:31:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 02:31:44,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:31:44,288 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:31:44,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-26 02:31:44,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:31:44,502 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:31:44,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:31:44,503 INFO L82 PathProgramCache]: Analyzing trace with hash 223507459, now seen corresponding path program 4 times [2021-08-26 02:31:44,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:31:44,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118796348] [2021-08-26 02:31:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:31:44,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:31:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:31:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:31:45,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:31:45,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118796348] [2021-08-26 02:31:45,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118796348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:31:45,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975648026] [2021-08-26 02:31:45,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:31:45,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:31:45,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:31:45,046 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:31:45,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-26 02:31:47,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:31:47,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:31:47,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 93 conjunts are in the unsatisfiable core [2021-08-26 02:31:47,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:31:47,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:31:48,019 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:31:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:31:48,037 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:31:48,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:31:48,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:31:48,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:31:48,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:31:48,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:31:48,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:31:48,220 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:31:48,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 173 treesize of output 110 [2021-08-26 02:31:48,241 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:31:48,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 86 [2021-08-26 02:31:48,265 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:31:48,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 100 [2021-08-26 02:31:48,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:31:48,404 INFO L354 Elim1Store]: treesize reduction 79, result has 12.2 percent of original size [2021-08-26 02:31:48,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 88 [2021-08-26 02:31:48,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:31:48,416 INFO L354 Elim1Store]: treesize reduction 79, result has 12.2 percent of original size [2021-08-26 02:31:48,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 73 [2021-08-26 02:31:48,547 INFO L354 Elim1Store]: treesize reduction 172, result has 13.1 percent of original size [2021-08-26 02:31:48,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 289 treesize of output 128 [2021-08-26 02:31:48,582 INFO L354 Elim1Store]: treesize reduction 172, result has 13.1 percent of original size [2021-08-26 02:31:48,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 221 treesize of output 144 [2021-08-26 02:31:48,622 INFO L354 Elim1Store]: treesize reduction 158, result has 27.5 percent of original size [2021-08-26 02:31:48,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 153 treesize of output 187 [2021-08-26 02:31:48,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:31:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:31:48,823 INFO L354 Elim1Store]: treesize reduction 111, result has 9.0 percent of original size [2021-08-26 02:31:48,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 163 treesize of output 114 [2021-08-26 02:31:48,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:31:48,839 INFO L354 Elim1Store]: treesize reduction 111, result has 9.0 percent of original size [2021-08-26 02:31:48,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 123 [2021-08-26 02:31:49,073 INFO L354 Elim1Store]: treesize reduction 238, result has 12.2 percent of original size [2021-08-26 02:31:49,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 504 treesize of output 185 [2021-08-26 02:31:49,127 INFO L354 Elim1Store]: treesize reduction 238, result has 12.2 percent of original size [2021-08-26 02:31:49,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 420 treesize of output 301 [2021-08-26 02:31:49,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 276 [2021-08-26 02:31:49,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 261 [2021-08-26 02:31:49,161 INFO L354 Elim1Store]: treesize reduction 160, result has 23.4 percent of original size [2021-08-26 02:31:49,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 258 treesize of output 264 [2021-08-26 02:31:49,349 INFO L354 Elim1Store]: treesize reduction 153, result has 6.7 percent of original size [2021-08-26 02:31:49,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 11 case distinctions, treesize of input 471 treesize of output 154 [2021-08-26 02:31:49,371 INFO L354 Elim1Store]: treesize reduction 169, result has 6.1 percent of original size [2021-08-26 02:31:49,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 11 case distinctions, treesize of input 396 treesize of output 319 [2021-08-26 02:31:49,381 INFO L354 Elim1Store]: treesize reduction 105, result has 18.0 percent of original size [2021-08-26 02:31:49,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 321 treesize of output 300 [2021-08-26 02:31:51,438 INFO L354 Elim1Store]: treesize reduction 149, result has 13.9 percent of original size [2021-08-26 02:31:51,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 327 treesize of output 153 [2021-08-26 02:31:51,466 INFO L354 Elim1Store]: treesize reduction 150, result has 2.0 percent of original size [2021-08-26 02:31:51,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 86 [2021-08-26 02:31:51,584 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-08-26 02:31:51,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 44 [2021-08-26 02:31:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:31:51,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975648026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:31:51,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:31:51,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-08-26 02:31:51,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545896262] [2021-08-26 02:31:51,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-26 02:31:51,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:31:51,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-26 02:31:51,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-08-26 02:31:51,593 INFO L87 Difference]: Start difference. First operand 447 states and 551 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 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) [2021-08-26 02:32:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:32:00,514 INFO L93 Difference]: Finished difference Result 715 states and 867 transitions. [2021-08-26 02:32:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-26 02:32:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 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 47 [2021-08-26 02:32:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:32:00,516 INFO L225 Difference]: With dead ends: 715 [2021-08-26 02:32:00,516 INFO L226 Difference]: Without dead ends: 713 [2021-08-26 02:32:00,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 3923.6ms TimeCoverageRelationStatistics Valid=425, Invalid=4545, Unknown=0, NotChecked=0, Total=4970 [2021-08-26 02:32:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-08-26 02:32:00,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 465. [2021-08-26 02:32:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 462 states have (on average 1.2402597402597402) internal successors, (573), 464 states have internal predecessors, (573), 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) [2021-08-26 02:32:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 573 transitions. [2021-08-26 02:32:00,565 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 573 transitions. Word has length 47 [2021-08-26 02:32:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:32:00,565 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 573 transitions. [2021-08-26 02:32:00,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 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) [2021-08-26 02:32:00,565 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 573 transitions. [2021-08-26 02:32:00,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 02:32:00,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:32:00,566 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:32:00,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-26 02:32:00,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-26 02:32:00,773 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:32:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:32:00,773 INFO L82 PathProgramCache]: Analyzing trace with hash 546613270, now seen corresponding path program 1 times [2021-08-26 02:32:00,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:32:00,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729669490] [2021-08-26 02:32:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:32:00,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:32:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:32:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:01,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:32:01,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729669490] [2021-08-26 02:32:01,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729669490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:32:01,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366332419] [2021-08-26 02:32:01,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:32:01,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:32:01,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:32:01,269 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:32:01,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-26 02:32:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:32:04,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 77 conjunts are in the unsatisfiable core [2021-08-26 02:32:04,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:32:04,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:32:04,433 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:32:04,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:32:04,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:32:04,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:32:04,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:04,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:32:04,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:04,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:32:04,622 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-08-26 02:32:04,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 149 treesize of output 94 [2021-08-26 02:32:04,644 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:32:04,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 83 [2021-08-26 02:32:04,668 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:32:04,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 92 [2021-08-26 02:32:04,858 INFO L354 Elim1Store]: treesize reduction 126, result has 14.9 percent of original size [2021-08-26 02:32:04,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 127 [2021-08-26 02:32:04,886 INFO L354 Elim1Store]: treesize reduction 214, result has 13.7 percent of original size [2021-08-26 02:32:04,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 163 treesize of output 142 [2021-08-26 02:32:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:05,973 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-08-26 02:32:05,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 225 treesize of output 168 [2021-08-26 02:32:05,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:06,008 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-08-26 02:32:06,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 166 treesize of output 147 [2021-08-26 02:32:06,048 INFO L354 Elim1Store]: treesize reduction 108, result has 19.4 percent of original size [2021-08-26 02:32:06,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 131 [2021-08-26 02:32:06,079 INFO L354 Elim1Store]: treesize reduction 108, result has 19.4 percent of original size [2021-08-26 02:32:06,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 135 treesize of output 139 [2021-08-26 02:32:06,100 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-08-26 02:32:06,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 135 [2021-08-26 02:32:06,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:06,116 INFO L354 Elim1Store]: treesize reduction 77, result has 10.5 percent of original size [2021-08-26 02:32:06,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 115 [2021-08-26 02:32:06,313 INFO L354 Elim1Store]: treesize reduction 164, result has 11.8 percent of original size [2021-08-26 02:32:06,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 299 treesize of output 181 [2021-08-26 02:32:06,343 INFO L354 Elim1Store]: treesize reduction 77, result has 16.3 percent of original size [2021-08-26 02:32:06,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 362 treesize of output 308 [2021-08-26 02:32:06,383 INFO L354 Elim1Store]: treesize reduction 408, result has 9.3 percent of original size [2021-08-26 02:32:06,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 287 treesize of output 203 [2021-08-26 02:32:06,955 INFO L354 Elim1Store]: treesize reduction 52, result has 14.8 percent of original size [2021-08-26 02:32:06,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 102 [2021-08-26 02:32:06,961 INFO L354 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2021-08-26 02:32:06,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 59 [2021-08-26 02:32:07,066 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:32:07,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-08-26 02:32:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:07,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366332419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:32:07,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:32:07,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-08-26 02:32:07,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546146042] [2021-08-26 02:32:07,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-26 02:32:07,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:32:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-26 02:32:07,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-08-26 02:32:07,076 INFO L87 Difference]: Start difference. First operand 465 states and 573 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 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) [2021-08-26 02:32:11,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:32:11,470 INFO L93 Difference]: Finished difference Result 783 states and 919 transitions. [2021-08-26 02:32:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 02:32:11,470 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 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 47 [2021-08-26 02:32:11,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:32:11,472 INFO L225 Difference]: With dead ends: 783 [2021-08-26 02:32:11,472 INFO L226 Difference]: Without dead ends: 781 [2021-08-26 02:32:11,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 3651.4ms TimeCoverageRelationStatistics Valid=732, Invalid=4380, Unknown=0, NotChecked=0, Total=5112 [2021-08-26 02:32:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-08-26 02:32:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 475. [2021-08-26 02:32:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 472 states have (on average 1.2372881355932204) internal successors, (584), 474 states have internal predecessors, (584), 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) [2021-08-26 02:32:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 584 transitions. [2021-08-26 02:32:11,520 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 584 transitions. Word has length 47 [2021-08-26 02:32:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:32:11,520 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 584 transitions. [2021-08-26 02:32:11,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 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) [2021-08-26 02:32:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 584 transitions. [2021-08-26 02:32:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 02:32:11,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:32:11,522 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:32:11,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-26 02:32:11,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-26 02:32:11,735 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:32:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:32:11,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1058374236, now seen corresponding path program 2 times [2021-08-26 02:32:11,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:32:11,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228862038] [2021-08-26 02:32:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:32:11,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:32:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:32:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:12,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:32:12,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228862038] [2021-08-26 02:32:12,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228862038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:32:12,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90841541] [2021-08-26 02:32:12,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:32:12,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:32:12,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:32:12,504 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:32:12,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-26 02:32:15,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:32:15,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:32:15,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-26 02:32:15,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:32:15,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:32:15,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:32:15,871 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:32:15,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:32:15,886 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:32:15,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:32:15,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:15,907 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-08-26 02:32:15,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-08-26 02:32:15,927 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:32:15,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:32:16,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-26 02:32:16,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:16,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:32:16,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:16,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:16,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:32:16,246 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:32:16,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 241 treesize of output 166 [2021-08-26 02:32:16,281 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:32:16,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 197 treesize of output 142 [2021-08-26 02:32:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:16,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:32:16,288 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:32:16,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 110 [2021-08-26 02:32:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:16,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:32:16,294 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:32:16,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 95 [2021-08-26 02:32:16,318 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:32:16,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 104 [2021-08-26 02:32:16,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:16,493 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 02:32:16,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 109 [2021-08-26 02:32:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:16,499 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:32:16,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 103 [2021-08-26 02:32:16,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:32:16,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:32:16,511 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-26 02:32:16,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 96 [2021-08-26 02:32:16,758 INFO L354 Elim1Store]: treesize reduction 140, result has 13.6 percent of original size [2021-08-26 02:32:16,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 384 treesize of output 202 [2021-08-26 02:32:16,798 INFO L354 Elim1Store]: treesize reduction 248, result has 12.1 percent of original size [2021-08-26 02:32:16,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 316 treesize of output 220 [2021-08-26 02:32:16,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:16,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:32:16,845 INFO L354 Elim1Store]: treesize reduction 460, result has 13.0 percent of original size [2021-08-26 02:32:16,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 257 treesize of output 210 [2021-08-26 02:32:16,884 INFO L354 Elim1Store]: treesize reduction 138, result has 27.4 percent of original size [2021-08-26 02:32:16,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 178 treesize of output 208 [2021-08-26 02:32:17,144 INFO L354 Elim1Store]: treesize reduction 212, result has 12.0 percent of original size [2021-08-26 02:32:17,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 623 treesize of output 245 [2021-08-26 02:32:17,188 INFO L354 Elim1Store]: treesize reduction 300, result has 12.0 percent of original size [2021-08-26 02:32:17,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 504 treesize of output 296 [2021-08-26 02:32:17,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:32:17,220 INFO L354 Elim1Store]: treesize reduction 474, result has 8.8 percent of original size [2021-08-26 02:32:17,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 385 treesize of output 370 [2021-08-26 02:32:18,789 INFO L354 Elim1Store]: treesize reduction 121, result has 6.2 percent of original size [2021-08-26 02:32:18,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 358 treesize of output 152 [2021-08-26 02:32:18,808 INFO L354 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2021-08-26 02:32:18,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 80 [2021-08-26 02:32:19,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:32:19,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:19,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:32:19,335 INFO L354 Elim1Store]: treesize reduction 114, result has 21.4 percent of original size [2021-08-26 02:32:19,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 89 [2021-08-26 02:32:19,359 INFO L354 Elim1Store]: treesize reduction 68, result has 16.0 percent of original size [2021-08-26 02:32:19,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 79 [2021-08-26 02:32:19,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:19,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-26 02:32:19,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:19,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-26 02:32:19,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:19,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:32:19,528 INFO L354 Elim1Store]: treesize reduction 101, result has 6.5 percent of original size [2021-08-26 02:32:19,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 93 treesize of output 84 [2021-08-26 02:32:28,710 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-08-26 02:32:28,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 59 [2021-08-26 02:32:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:28,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90841541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:32:28,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:32:28,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-26 02:32:28,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360130467] [2021-08-26 02:32:28,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-26 02:32:28,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:32:28,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-26 02:32:28,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=786, Unknown=4, NotChecked=0, Total=930 [2021-08-26 02:32:28,719 INFO L87 Difference]: Start difference. First operand 475 states and 584 transitions. Second operand has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 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) [2021-08-26 02:35:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:35:32,846 INFO L93 Difference]: Finished difference Result 914 states and 1073 transitions. [2021-08-26 02:35:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 02:35:32,847 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 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 47 [2021-08-26 02:35:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:35:32,849 INFO L225 Difference]: With dead ends: 914 [2021-08-26 02:35:32,849 INFO L226 Difference]: Without dead ends: 912 [2021-08-26 02:35:32,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 47890.1ms TimeCoverageRelationStatistics Valid=641, Invalid=4038, Unknown=13, NotChecked=0, Total=4692 [2021-08-26 02:35:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-08-26 02:35:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 524. [2021-08-26 02:35:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 521 states have (on average 1.2456813819577734) internal successors, (649), 523 states have internal predecessors, (649), 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) [2021-08-26 02:35:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 649 transitions. [2021-08-26 02:35:32,922 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 649 transitions. Word has length 47 [2021-08-26 02:35:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:35:32,922 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 649 transitions. [2021-08-26 02:35:32,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 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) [2021-08-26 02:35:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 649 transitions. [2021-08-26 02:35:32,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 02:35:32,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:35:32,924 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:35:32,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-26 02:35:33,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-26 02:35:33,137 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:35:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:35:33,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1473965553, now seen corresponding path program 5 times [2021-08-26 02:35:33,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:35:33,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341195708] [2021-08-26 02:35:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:35:33,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:35:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:35:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:33,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:35:33,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341195708] [2021-08-26 02:35:33,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341195708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:35:33,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826755276] [2021-08-26 02:35:33,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 02:35:33,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:35:33,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:35:33,530 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:35:33,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-26 02:35:37,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-26 02:35:37,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:35:37,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-26 02:35:37,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:35:37,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:35:37,192 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:35:37,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:35:37,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:35:37,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:35:37,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:35:37,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:35:37,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:35:37,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:35:37,415 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:35:37,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 173 treesize of output 110 [2021-08-26 02:35:37,437 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:35:37,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 86 [2021-08-26 02:35:37,461 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:35:37,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 100 [2021-08-26 02:35:37,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:35:37,600 INFO L354 Elim1Store]: treesize reduction 79, result has 12.2 percent of original size [2021-08-26 02:35:37,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 88 [2021-08-26 02:35:37,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:35:37,614 INFO L354 Elim1Store]: treesize reduction 79, result has 12.2 percent of original size [2021-08-26 02:35:37,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 73 [2021-08-26 02:35:37,745 INFO L354 Elim1Store]: treesize reduction 172, result has 13.1 percent of original size [2021-08-26 02:35:37,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 283 treesize of output 122 [2021-08-26 02:35:37,782 INFO L354 Elim1Store]: treesize reduction 172, result has 13.1 percent of original size [2021-08-26 02:35:37,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 215 treesize of output 138 [2021-08-26 02:35:37,801 INFO L354 Elim1Store]: treesize reduction 68, result has 29.9 percent of original size [2021-08-26 02:35:37,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 147 treesize of output 151 [2021-08-26 02:35:37,948 INFO L354 Elim1Store]: treesize reduction 113, result has 8.9 percent of original size [2021-08-26 02:35:37,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 290 treesize of output 115 [2021-08-26 02:35:37,964 INFO L354 Elim1Store]: treesize reduction 125, result has 8.1 percent of original size [2021-08-26 02:35:37,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 227 treesize of output 176 [2021-08-26 02:35:39,182 INFO L354 Elim1Store]: treesize reduction 227, result has 8.8 percent of original size [2021-08-26 02:35:39,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 393 treesize of output 159 [2021-08-26 02:35:39,228 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-08-26 02:35:39,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 98 treesize of output 68 [2021-08-26 02:35:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:39,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826755276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:35:39,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:35:39,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-26 02:35:39,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327899729] [2021-08-26 02:35:39,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 02:35:39,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:35:39,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 02:35:39,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-08-26 02:35:39,242 INFO L87 Difference]: Start difference. First operand 524 states and 649 transitions. Second operand has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 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) [2021-08-26 02:35:43,738 WARN L224 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-26 02:35:43,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-08-26 02:35:43,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-26 02:35:43,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-26 02:35:43,940 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:310) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:154) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:881) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:152) ... 35 more [2021-08-26 02:35:43,944 INFO L168 Benchmark]: Toolchain (without parser) took 588799.91 ms. Allocated memory was 58.7 MB in the beginning and 664.8 MB in the end (delta: 606.1 MB). Free memory was 35.6 MB in the beginning and 211.1 MB in the end (delta: -175.4 MB). Peak memory consumption was 431.4 MB. Max. memory is 16.1 GB. [2021-08-26 02:35:43,944 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 58.7 MB. Free memory was 40.4 MB in the beginning and 40.3 MB in the end (delta: 37.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:35:43,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 399.00 ms. Allocated memory is still 58.7 MB. Free memory was 35.5 MB in the beginning and 33.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 02:35:43,945 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.28 ms. Allocated memory is still 58.7 MB. Free memory was 33.8 MB in the beginning and 31.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:35:43,945 INFO L168 Benchmark]: Boogie Preprocessor took 24.95 ms. Allocated memory is still 58.7 MB. Free memory was 31.5 MB in the beginning and 29.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:35:43,945 INFO L168 Benchmark]: RCFGBuilder took 612.12 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 29.6 MB in the beginning and 49.8 MB in the end (delta: -20.2 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:35:43,945 INFO L168 Benchmark]: TraceAbstraction took 587723.89 ms. Allocated memory was 71.3 MB in the beginning and 664.8 MB in the end (delta: 593.5 MB). Free memory was 49.5 MB in the beginning and 211.1 MB in the end (delta: -161.6 MB). Peak memory consumption was 431.5 MB. Max. memory is 16.1 GB. [2021-08-26 02:35:43,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 58.7 MB. Free memory was 40.4 MB in the beginning and 40.3 MB in the end (delta: 37.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 399.00 ms. Allocated memory is still 58.7 MB. Free memory was 35.5 MB in the beginning and 33.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.28 ms. Allocated memory is still 58.7 MB. Free memory was 33.8 MB in the beginning and 31.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.95 ms. Allocated memory is still 58.7 MB. Free memory was 31.5 MB in the beginning and 29.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 612.12 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 29.6 MB in the beginning and 49.8 MB in the end (delta: -20.2 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 587723.89 ms. Allocated memory was 71.3 MB in the beginning and 664.8 MB in the end (delta: 593.5 MB). Free memory was 49.5 MB in the beginning and 211.1 MB in the end (delta: -161.6 MB). Peak memory consumption was 431.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:310) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:35:45,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:35:45,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:35:45,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:35:45,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:35:45,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:35:45,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:35:45,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:35:45,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:35:45,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:35:45,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:35:45,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:35:45,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:35:45,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:35:45,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:35:45,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:35:45,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:35:45,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:35:45,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:35:45,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:35:45,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:35:45,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:35:45,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:35:45,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:35:45,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:35:45,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:35:45,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:35:45,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:35:45,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:35:45,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:35:45,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:35:45,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:35:45,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:35:45,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:35:45,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:35:45,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:35:45,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:35:45,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:35:45,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:35:45,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:35:45,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:35:45,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 02:35:45,697 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:35:45,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:35:45,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:35:45,698 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:35:45,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:35:45,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:35:45,699 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:35:45,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:35:45,700 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:35:45,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:35:45,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:35:45,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:35:45,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:35:45,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:35:45,701 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 02:35:45,701 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 02:35:45,701 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:35:45,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:35:45,702 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:35:45,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:35:45,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:35:45,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:35:45,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:35:45,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:35:45,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:35:45,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:35:45,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:35:45,703 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 02:35:45,703 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 02:35:45,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:35:45,704 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:35:45,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 02:35:45,704 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc3896142acc5bdf441df6ee5a4320292e59871e [2021-08-26 02:35:45,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:35:46,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:35:46,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:35:46,015 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:35:46,015 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:35:46,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-sorted-2.i [2021-08-26 02:35:46,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce669b3bc/9ef93fae70654f7dbb2fffc0a98d3612/FLAGb7b395e54 [2021-08-26 02:35:46,632 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:35:46,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i [2021-08-26 02:35:46,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce669b3bc/9ef93fae70654f7dbb2fffc0a98d3612/FLAGb7b395e54 [2021-08-26 02:35:47,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce669b3bc/9ef93fae70654f7dbb2fffc0a98d3612 [2021-08-26 02:35:47,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:35:47,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:35:47,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:35:47,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:35:47,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:35:47,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18782d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47, skipping insertion in model container [2021-08-26 02:35:47,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:35:47,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:35:47,416 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22317,22330] [2021-08-26 02:35:47,419 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22452,22465] [2021-08-26 02:35:47,424 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22612,22625] [2021-08-26 02:35:47,432 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22941,22954] [2021-08-26 02:35:47,433 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23005,23018] [2021-08-26 02:35:47,438 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23136,23149] [2021-08-26 02:35:47,439 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23200,23213] [2021-08-26 02:35:47,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:35:47,459 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:35:47,506 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22317,22330] [2021-08-26 02:35:47,509 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22452,22465] [2021-08-26 02:35:47,519 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22612,22625] [2021-08-26 02:35:47,522 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22941,22954] [2021-08-26 02:35:47,526 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23005,23018] [2021-08-26 02:35:47,527 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23136,23149] [2021-08-26 02:35:47,529 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23200,23213] [2021-08-26 02:35:47,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:35:47,562 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:35:47,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47 WrapperNode [2021-08-26 02:35:47,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:35:47,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:35:47,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:35:47,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:35:47,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:35:47,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:35:47,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:35:47,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:35:47,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:35:47,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:35:47,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:35:47,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:35:47,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47" (1/1) ... [2021-08-26 02:35:47,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:35:47,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:35:47,722 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) [2021-08-26 02:35:47,749 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 [2021-08-26 02:35:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-26 02:35:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:35:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:35:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:35:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:35:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:35:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-26 02:35:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 02:35:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:35:47,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:35:48,263 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:35:48,264 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-08-26 02:35:48,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:35:48 BoogieIcfgContainer [2021-08-26 02:35:48,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:35:48,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:35:48,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:35:48,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:35:48,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:35:47" (1/3) ... [2021-08-26 02:35:48,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74db4484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:35:48, skipping insertion in model container [2021-08-26 02:35:48,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:47" (2/3) ... [2021-08-26 02:35:48,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74db4484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:35:48, skipping insertion in model container [2021-08-26 02:35:48,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:35:48" (3/3) ... [2021-08-26 02:35:48,272 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-sorted-2.i [2021-08-26 02:35:48,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:35:48,276 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-08-26 02:35:48,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:35:48,327 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-26 02:35:48,327 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-26 02:35:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 59 states have internal predecessors, (97), 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) [2021-08-26 02:35:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:35:48,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:35:48,341 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:35:48,342 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:35:48,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:35:48,346 INFO L82 PathProgramCache]: Analyzing trace with hash 890122502, now seen corresponding path program 1 times [2021-08-26 02:35:48,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:35:48,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123408361] [2021-08-26 02:35:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:35:48,358 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:35:48,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:35:48,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:35:48,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 02:35:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:35:48,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 02:35:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:35:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:48,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:35:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:48,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:35:48,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123408361] [2021-08-26 02:35:48,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123408361] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:35:48,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:35:48,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-26 02:35:48,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079683044] [2021-08-26 02:35:48,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:35:48,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:35:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:35:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:35:48,580 INFO L87 Difference]: Start difference. First operand has 60 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 59 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 02:35:48,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:35:48,601 INFO L93 Difference]: Finished difference Result 115 states and 185 transitions. [2021-08-26 02:35:48,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:35:48,602 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-08-26 02:35:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:35:48,608 INFO L225 Difference]: With dead ends: 115 [2021-08-26 02:35:48,608 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 02:35:48,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:35:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 02:35:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-26 02:35:48,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 53 states have internal predecessors, (63), 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) [2021-08-26 02:35:48,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-08-26 02:35:48,637 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 6 [2021-08-26 02:35:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:35:48,637 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-08-26 02:35:48,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 02:35:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-08-26 02:35:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:35:48,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:35:48,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:35:48,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-08-26 02:35:48,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:35:48,844 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:35:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:35:48,845 INFO L82 PathProgramCache]: Analyzing trace with hash 889645846, now seen corresponding path program 1 times [2021-08-26 02:35:48,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:35:48,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244214188] [2021-08-26 02:35:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:35:48,846 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:35:48,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:35:48,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:35:48,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 02:35:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:35:48,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-26 02:35:48,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:35:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:48,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:35:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:48,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:35:48,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244214188] [2021-08-26 02:35:48,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244214188] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:35:48,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:35:48,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-26 02:35:48,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382729617] [2021-08-26 02:35:48,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:35:48,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:35:48,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:35:48,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:35:48,961 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-08-26 02:35:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:35:49,027 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2021-08-26 02:35:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:35:49,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-08-26 02:35:49,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:35:49,029 INFO L225 Difference]: With dead ends: 110 [2021-08-26 02:35:49,029 INFO L226 Difference]: Without dead ends: 58 [2021-08-26 02:35:49,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:35:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-26 02:35:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-08-26 02:35:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.34) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:35:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-08-26 02:35:49,036 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 6 [2021-08-26 02:35:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:35:49,036 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-08-26 02:35:49,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-08-26 02:35:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-08-26 02:35:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 02:35:49,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:35:49,037 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:35:49,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-26 02:35:49,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:35:49,257 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:35:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:35:49,257 INFO L82 PathProgramCache]: Analyzing trace with hash 586319425, now seen corresponding path program 1 times [2021-08-26 02:35:49,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:35:49,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163956901] [2021-08-26 02:35:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:35:49,258 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:35:49,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:35:49,259 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:35:49,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-26 02:35:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:35:49,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 02:35:49,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:35:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:35:49,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:35:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:35:49,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:35:49,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163956901] [2021-08-26 02:35:49,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163956901] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:35:49,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:35:49,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-26 02:35:49,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424552919] [2021-08-26 02:35:49,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:35:49,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:35:49,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:35:49,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:35:49,463 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:35:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:35:49,655 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-08-26 02:35:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:35:49,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-26 02:35:49,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:35:49,658 INFO L225 Difference]: With dead ends: 95 [2021-08-26 02:35:49,658 INFO L226 Difference]: Without dead ends: 93 [2021-08-26 02:35:49,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:35:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-26 02:35:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2021-08-26 02:35:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 54 states have internal predecessors, (65), 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) [2021-08-26 02:35:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-08-26 02:35:49,669 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 9 [2021-08-26 02:35:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:35:49,670 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-08-26 02:35:49,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:35:49,670 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-08-26 02:35:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 02:35:49,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:35:49,671 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:35:49,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:35:49,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:35:49,881 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:35:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:35:49,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1244464818, now seen corresponding path program 1 times [2021-08-26 02:35:49,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:35:49,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128435445] [2021-08-26 02:35:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:35:49,883 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:35:49,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:35:49,884 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:35:49,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-26 02:35:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:35:49,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 02:35:49,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:35:50,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:35:50,103 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:35:50,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:35:50,128 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:35:50,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-08-26 02:35:50,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:35:50,327 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-08-26 02:35:50,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 114 [2021-08-26 02:35:50,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2021-08-26 02:35:50,369 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:35:50,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 86 [2021-08-26 02:35:50,720 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:35:50,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 65 [2021-08-26 02:35:50,736 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-08-26 02:35:50,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 38 [2021-08-26 02:35:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:50,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:35:50,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 64 [2021-08-26 02:35:51,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:35:51,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128435445] [2021-08-26 02:35:51,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:35:51,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205573327] [2021-08-26 02:35:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:35:51,014 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-26 02:35:51,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-26 02:35:51,025 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-26 02:35:51,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-08-26 02:35:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:35:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 02:35:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:35:51,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:35:51,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:35:51,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:35:51,351 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-08-26 02:35:51,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-08-26 02:35:51,389 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:35:51,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-08-26 02:35:51,467 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-26 02:35:51,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-08-26 02:35:51,832 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-26 02:35:51,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 14 [2021-08-26 02:35:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:51,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:35:54,144 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_51 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_51 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_51))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_5)))) (store .cse0 v_ULTIMATE.start_main_~x~0.base_51 (store (store (select .cse0 v_ULTIMATE.start_main_~x~0.base_51) v_ULTIMATE.start_main_~x~0.offset_51 v_DerPreprocessor_4) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_51) (_ bv1 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)))) is different from false [2021-08-26 02:35:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-08-26 02:35:54,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1205573327] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 02:35:54,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:35:54,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-26 02:35:54,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642937193] [2021-08-26 02:35:54,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 02:35:54,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:35:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 02:35:54,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=263, Unknown=1, NotChecked=32, Total=342 [2021-08-26 02:35:54,177 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:35:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:35:55,472 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2021-08-26 02:35:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 02:35:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 02:35:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:35:55,474 INFO L225 Difference]: With dead ends: 99 [2021-08-26 02:35:55,474 INFO L226 Difference]: Without dead ends: 97 [2021-08-26 02:35:55,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2811.1ms TimeCoverageRelationStatistics Valid=80, Invalid=429, Unknown=1, NotChecked=42, Total=552 [2021-08-26 02:35:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-26 02:35:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2021-08-26 02:35:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 67 states have internal predecessors, (83), 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) [2021-08-26 02:35:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-08-26 02:35:55,494 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 16 [2021-08-26 02:35:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:35:55,494 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-08-26 02:35:55,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:35:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-08-26 02:35:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 02:35:55,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:35:55,495 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:35:55,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-26 02:35:55,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-08-26 02:35:55,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-08-26 02:35:55,907 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 02:35:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:35:55,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1894539407, now seen corresponding path program 1 times [2021-08-26 02:35:55,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:35:55,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138639838] [2021-08-26 02:35:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:35:55,908 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:35:55,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:35:55,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:35:55,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-26 02:35:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:35:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 02:35:56,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:35:56,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:35:56,155 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:35:56,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-26 02:35:56,192 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:35:56,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:35:56,226 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:35:56,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-26 02:35:56,390 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-08-26 02:35:56,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 114 [2021-08-26 02:35:56,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2021-08-26 02:35:56,430 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:35:56,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 86 [2021-08-26 02:35:56,879 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:35:56,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 42 [2021-08-26 02:35:56,886 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:35:56,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-08-26 02:35:56,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:35:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:56,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:35:57,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 85 [2021-08-26 02:35:57,273 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:35:57,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138639838] [2021-08-26 02:35:57,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:35:57,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1898056610] [2021-08-26 02:35:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:35:57,274 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-26 02:35:57,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-26 02:35:57,285 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-26 02:35:57,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-08-26 02:35:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:35:57,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 02:35:57,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:35:57,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:35:57,594 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:35:57,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-08-26 02:35:57,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:35:57,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:35:57,748 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-08-26 02:35:57,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 114 [2021-08-26 02:35:57,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2021-08-26 02:35:57,780 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:35:57,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 86 [2021-08-26 02:35:58,135 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:35:58,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 47 [2021-08-26 02:35:58,141 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:35:58,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-08-26 02:35:58,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:35:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:58,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:35:58,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 85 [2021-08-26 02:35:58,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:35:58,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41064634] [2021-08-26 02:35:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:35:58,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:35:58,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:35:58,419 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) [2021-08-26 02:35:58,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 02:35:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:35:58,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 02:35:58,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:35:58,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:35:58,731 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:35:58,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:35:58,765 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-26 02:35:58,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-26 02:35:58,788 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:35:58,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-08-26 02:35:58,921 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-08-26 02:35:58,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 114 [2021-08-26 02:35:58,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2021-08-26 02:35:58,962 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:35:58,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 86 [2021-08-26 02:35:59,287 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-26 02:35:59,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 52 [2021-08-26 02:35:59,292 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:35:59,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2021-08-26 02:35:59,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:35:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:59,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:35:59,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 85 [2021-08-26 02:35:59,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:35:59,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:35:59,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-26 02:35:59,518 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-26 02:35:59,518 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-26 02:35:59,521 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:35:59,522 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:35:59,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:35:59,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:35:59,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:35:59,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:35:59,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:35:59,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 02:35:59,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-08-26 02:35:59,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-08-26 02:36:00,133 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,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:36:00,138 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:36:00,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:36:00 BoogieIcfgContainer [2021-08-26 02:36:00,147 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:36:00,148 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:36:00,148 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:36:00,148 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:36:00,149 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:35:48" (3/4) ... [2021-08-26 02:36:00,151 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 02:36:00,151 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:36:00,152 INFO L168 Benchmark]: Toolchain (without parser) took 13068.02 ms. Allocated memory was 48.2 MB in the beginning and 117.4 MB in the end (delta: 69.2 MB). Free memory was 22.0 MB in the beginning and 76.2 MB in the end (delta: -54.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:36:00,152 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 48.2 MB. Free memory was 30.3 MB in the beginning and 30.2 MB in the end (delta: 28.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:36:00,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 478.71 ms. Allocated memory was 48.2 MB in the beginning and 65.0 MB in the end (delta: 16.8 MB). Free memory was 21.8 MB in the beginning and 39.6 MB in the end (delta: -17.7 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:36:00,153 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.11 ms. Allocated memory is still 65.0 MB. Free memory was 39.6 MB in the beginning and 37.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:36:00,153 INFO L168 Benchmark]: Boogie Preprocessor took 56.31 ms. Allocated memory is still 65.0 MB. Free memory was 37.3 MB in the beginning and 35.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:36:00,153 INFO L168 Benchmark]: RCFGBuilder took 572.83 ms. Allocated memory is still 65.0 MB. Free memory was 35.0 MB in the beginning and 36.0 MB in the end (delta: -1.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-08-26 02:36:00,153 INFO L168 Benchmark]: TraceAbstraction took 11880.36 ms. Allocated memory was 65.0 MB in the beginning and 117.4 MB in the end (delta: 52.4 MB). Free memory was 35.7 MB in the beginning and 76.2 MB in the end (delta: -40.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. [2021-08-26 02:36:00,154 INFO L168 Benchmark]: Witness Printer took 3.18 ms. Allocated memory is still 117.4 MB. Free memory is still 76.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:36:00,155 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 48.2 MB. Free memory was 30.3 MB in the beginning and 30.2 MB in the end (delta: 28.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 478.71 ms. Allocated memory was 48.2 MB in the beginning and 65.0 MB in the end (delta: 16.8 MB). Free memory was 21.8 MB in the beginning and 39.6 MB in the end (delta: -17.7 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.11 ms. Allocated memory is still 65.0 MB. Free memory was 39.6 MB in the beginning and 37.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.31 ms. Allocated memory is still 65.0 MB. Free memory was 37.3 MB in the beginning and 35.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 572.83 ms. Allocated memory is still 65.0 MB. Free memory was 35.0 MB in the beginning and 36.0 MB in the end (delta: -1.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11880.36 ms. Allocated memory was 65.0 MB in the beginning and 117.4 MB in the end (delta: 52.4 MB). Free memory was 35.7 MB in the beginning and 76.2 MB in the end (delta: -40.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. * Witness Printer took 3.18 ms. Allocated memory is still 117.4 MB. Free memory is still 76.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1036]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = ((void*)0) [L998] head->data = 0 [L1000] SLL* x = head; [L1001] int marked = 0; [L1004] COND TRUE __VERIFIER_nondet_int() || !marked [L1007] x->next = malloc(sizeof(SLL)) [L1008] EXPR x->next [L1008] x = x->next [L1009] x->next = ((void*)0) [L1011] COND TRUE __VERIFIER_nondet_int() [L1013] marked = 1 [L1016] COND TRUE \read(marked) [L1017] x->data = 1 [L1004] COND FALSE !(__VERIFIER_nondet_int() || !marked) [L1022] x = head [L1024] COND FALSE !(!(((void*)0) != x)) [L1025] marked = 0 [L1027] EXPR x->next [L1027] x->next != ((void*)0) && x->next->data == 0 [L1027] EXPR x->next [L1027] EXPR x->next->data [L1027] x->next != ((void*)0) && x->next->data == 0 [L1027] COND FALSE !(x->next != ((void*)0) && x->next->data == 0) [L1033] EXPR x->next [L1033] COND TRUE x->next != ((void*)0) && __VERIFIER_nondet_int() [L1035] EXPR x->next [L1035] x = x->next [L1036] EXPR x->data [L1036] COND TRUE !(x->data == 1) [L1036] reach_error() - UnprovableResult [Line: 1024]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1055]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1056]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 60 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 11815.8ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 8.1ms, AutomataDifference: 1608.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 218 SDtfs, 221 SDslu, 335 SDs, 0 SdLazy, 213 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1058.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2829.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=4, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 51.8ms AutomataMinimizationTime, 4 MinimizatonAttempts, 68 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 63.6ms SsaConstructionTime, 104.9ms SatisfiabilityAnalysisTime, 3193.0ms InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 66 ConstructedInterpolants, 10 QuantifiedInterpolants, 565 SizeOfPredicates, 9 NumberOfNonLiveVariables, 197 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-26 02:36:00,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...