./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/forester-heap/sll-sorted-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/forester-heap/sll-sorted-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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 valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e45b14428dafe2f20aeac8c38d2592befc15b6791b0365935474ded4fd47d0f2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:43:01,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:43:01,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:43:01,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:43:01,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:43:01,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:43:01,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:43:01,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:43:01,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:43:01,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:43:01,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:43:01,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:43:01,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:43:01,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:43:01,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:43:01,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:43:01,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:43:01,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:43:01,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:43:01,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:43:01,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:43:01,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:43:01,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:43:01,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:43:01,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:43:01,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:43:01,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:43:01,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:43:01,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:43:01,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:43:01,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:43:01,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:43:01,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:43:01,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:43:01,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:43:01,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:43:01,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:43:01,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:43:01,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:43:01,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:43:01,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:43:01,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-12-16 05:43:01,182 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:43:01,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:43:01,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:43:01,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:43:01,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:43:01,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:43:01,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:43:01,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:43:01,185 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:43:01,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:43:01,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:43:01,186 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:43:01,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:43:01,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:43:01,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:43:01,187 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:43:01,187 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:43:01,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:43:01,187 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:43:01,187 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:43:01,187 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:43:01,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:43:01,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:43:01,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:43:01,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:43:01,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:43:01,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:43:01,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:43:01,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:43:01,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:43:01,191 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e45b14428dafe2f20aeac8c38d2592befc15b6791b0365935474ded4fd47d0f2 [2021-12-16 05:43:01,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:43:01,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:43:01,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:43:01,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:43:01,449 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:43:01,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-sorted-1.i [2021-12-16 05:43:01,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e53fbd76/f191461c634b47c2a1ae2251c667984d/FLAG559a3d332 [2021-12-16 05:43:01,858 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:43:01,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i [2021-12-16 05:43:01,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e53fbd76/f191461c634b47c2a1ae2251c667984d/FLAG559a3d332 [2021-12-16 05:43:02,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e53fbd76/f191461c634b47c2a1ae2251c667984d [2021-12-16 05:43:02,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:43:02,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:43:02,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:43:02,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:43:02,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:43:02,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6d02e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02, skipping insertion in model container [2021-12-16 05:43:02,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:43:02,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:43:02,556 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22317,22330] [2021-12-16 05:43:02,562 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22547,22560] [2021-12-16 05:43:02,567 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22877,22890] [2021-12-16 05:43:02,569 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22941,22954] [2021-12-16 05:43:02,571 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23072,23085] [2021-12-16 05:43:02,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23136,23149] [2021-12-16 05:43:02,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:43:02,585 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:43:02,631 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22317,22330] [2021-12-16 05:43:02,633 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22547,22560] [2021-12-16 05:43:02,643 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22877,22890] [2021-12-16 05:43:02,644 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22941,22954] [2021-12-16 05:43:02,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23072,23085] [2021-12-16 05:43:02,647 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23136,23149] [2021-12-16 05:43:02,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:43:02,674 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:43:02,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02 WrapperNode [2021-12-16 05:43:02,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:43:02,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:43:02,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:43:02,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:43:02,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,719 INFO L137 Inliner]: procedures = 119, calls = 39, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 189 [2021-12-16 05:43:02,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:43:02,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:43:02,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:43:02,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:43:02,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:43:02,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:43:02,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:43:02,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:43:02,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02" (1/1) ... [2021-12-16 05:43:02,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:43:02,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:43:02,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 05:43:02,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 05:43:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 05:43:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 05:43:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 05:43:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 05:43:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 05:43:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 05:43:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:43:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 05:43:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:43:02,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:43:02,888 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:43:02,890 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:43:03,212 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:43:03,220 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:43:03,220 INFO L301 CfgBuilder]: Removed 18 assume(true) statements. [2021-12-16 05:43:03,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:43:03 BoogieIcfgContainer [2021-12-16 05:43:03,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:43:03,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:43:03,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:43:03,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:43:03,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:43:02" (1/3) ... [2021-12-16 05:43:03,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203c2a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:43:03, skipping insertion in model container [2021-12-16 05:43:03,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:02" (2/3) ... [2021-12-16 05:43:03,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203c2a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:43:03, skipping insertion in model container [2021-12-16 05:43:03,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:43:03" (3/3) ... [2021-12-16 05:43:03,229 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-sorted-1.i [2021-12-16 05:43:03,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:43:03,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2021-12-16 05:43:03,274 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:43:03,280 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 05:43:03,281 INFO L340 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2021-12-16 05:43:03,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 90 states have (on average 2.1555555555555554) internal successors, (194), 158 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 05:43:03,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:03,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 05:43:03,317 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:03,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:03,322 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-16 05:43:03,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:03,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215736750] [2021-12-16 05:43:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:03,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:03,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:03,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215736750] [2021-12-16 05:43:03,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215736750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:03,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:03,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:43:03,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568628239] [2021-12-16 05:43:03,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:03,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:03,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:03,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:03,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:03,560 INFO L87 Difference]: Start difference. First operand has 159 states, 90 states have (on average 2.1555555555555554) internal successors, (194), 158 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:03,755 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2021-12-16 05:43:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:03,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-16 05:43:03,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:03,769 INFO L225 Difference]: With dead ends: 163 [2021-12-16 05:43:03,769 INFO L226 Difference]: Without dead ends: 159 [2021-12-16 05:43:03,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:03,775 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:03,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 111 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:43:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-16 05:43:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-12-16 05:43:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 89 states have (on average 1.8651685393258426) internal successors, (166), 154 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 166 transitions. [2021-12-16 05:43:03,819 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 166 transitions. Word has length 3 [2021-12-16 05:43:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:03,819 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 166 transitions. [2021-12-16 05:43:03,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 166 transitions. [2021-12-16 05:43:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 05:43:03,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:03,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 05:43:03,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:43:03,821 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:03,825 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-16 05:43:03,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:03,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971865201] [2021-12-16 05:43:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:03,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:03,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:03,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971865201] [2021-12-16 05:43:03,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971865201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:03,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:03,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:43:03,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241256188] [2021-12-16 05:43:03,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:03,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:03,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:03,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:03,911 INFO L87 Difference]: Start difference. First operand 155 states and 166 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:04,023 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2021-12-16 05:43:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:04,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-16 05:43:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:04,027 INFO L225 Difference]: With dead ends: 157 [2021-12-16 05:43:04,027 INFO L226 Difference]: Without dead ends: 157 [2021-12-16 05:43:04,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:04,030 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 149 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:04,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:43:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-16 05:43:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2021-12-16 05:43:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 152 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2021-12-16 05:43:04,057 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 3 [2021-12-16 05:43:04,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:04,057 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2021-12-16 05:43:04,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2021-12-16 05:43:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 05:43:04,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:04,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:04,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:43:04,060 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:04,061 INFO L85 PathProgramCache]: Analyzing trace with hash 59263661, now seen corresponding path program 1 times [2021-12-16 05:43:04,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:04,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993992188] [2021-12-16 05:43:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:04,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:04,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:04,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993992188] [2021-12-16 05:43:04,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993992188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:04,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:04,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:43:04,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610055237] [2021-12-16 05:43:04,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:04,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:43:04,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:43:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:43:04,162 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:04,326 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2021-12-16 05:43:04,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:43:04,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 05:43:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:04,327 INFO L225 Difference]: With dead ends: 162 [2021-12-16 05:43:04,327 INFO L226 Difference]: Without dead ends: 162 [2021-12-16 05:43:04,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:43:04,329 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 264 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:04,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 84 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:43:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-16 05:43:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 151. [2021-12-16 05:43:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 103 states have (on average 1.6796116504854368) internal successors, (173), 150 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2021-12-16 05:43:04,335 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 8 [2021-12-16 05:43:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:04,336 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2021-12-16 05:43:04,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,336 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2021-12-16 05:43:04,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 05:43:04,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:04,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:04,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 05:43:04,337 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:04,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:04,338 INFO L85 PathProgramCache]: Analyzing trace with hash 59263662, now seen corresponding path program 1 times [2021-12-16 05:43:04,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:04,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131557598] [2021-12-16 05:43:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:04,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:04,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:04,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131557598] [2021-12-16 05:43:04,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131557598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:04,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:04,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:43:04,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944690684] [2021-12-16 05:43:04,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:04,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:43:04,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:04,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:43:04,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:43:04,419 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:04,678 INFO L93 Difference]: Finished difference Result 229 states and 253 transitions. [2021-12-16 05:43:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:43:04,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 05:43:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:04,680 INFO L225 Difference]: With dead ends: 229 [2021-12-16 05:43:04,680 INFO L226 Difference]: Without dead ends: 229 [2021-12-16 05:43:04,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:43:04,681 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 515 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:04,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 176 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:43:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-16 05:43:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 197. [2021-12-16 05:43:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 149 states have (on average 1.5771812080536913) internal successors, (235), 196 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 235 transitions. [2021-12-16 05:43:04,688 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 235 transitions. Word has length 8 [2021-12-16 05:43:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:04,689 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 235 transitions. [2021-12-16 05:43:04,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 235 transitions. [2021-12-16 05:43:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 05:43:04,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:04,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:04,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 05:43:04,690 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:04,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1117776432, now seen corresponding path program 1 times [2021-12-16 05:43:04,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:04,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591979015] [2021-12-16 05:43:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:04,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:04,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:04,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591979015] [2021-12-16 05:43:04,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591979015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:04,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:04,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:43:04,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944813317] [2021-12-16 05:43:04,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:04,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:04,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:04,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:04,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:04,722 INFO L87 Difference]: Start difference. First operand 197 states and 235 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:04,739 INFO L93 Difference]: Finished difference Result 237 states and 278 transitions. [2021-12-16 05:43:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:04,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-16 05:43:04,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:04,745 INFO L225 Difference]: With dead ends: 237 [2021-12-16 05:43:04,745 INFO L226 Difference]: Without dead ends: 237 [2021-12-16 05:43:04,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:04,747 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 105 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:04,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 211 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:43:04,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-16 05:43:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 207. [2021-12-16 05:43:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 159 states have (on average 1.5660377358490567) internal successors, (249), 206 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2021-12-16 05:43:04,769 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 10 [2021-12-16 05:43:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:04,770 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2021-12-16 05:43:04,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:04,770 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2021-12-16 05:43:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:43:04,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:04,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:04,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 05:43:04,771 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:04,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash 467003055, now seen corresponding path program 1 times [2021-12-16 05:43:04,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:04,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567066655] [2021-12-16 05:43:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:04,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:04,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:04,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567066655] [2021-12-16 05:43:04,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567066655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:04,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:04,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:43:04,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980153014] [2021-12-16 05:43:04,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:04,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:43:04,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:04,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:43:04,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:43:04,826 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:05,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:05,040 INFO L93 Difference]: Finished difference Result 213 states and 254 transitions. [2021-12-16 05:43:05,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:43:05,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-16 05:43:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:05,042 INFO L225 Difference]: With dead ends: 213 [2021-12-16 05:43:05,042 INFO L226 Difference]: Without dead ends: 213 [2021-12-16 05:43:05,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:43:05,043 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 100 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:05,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 356 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:43:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-16 05:43:05,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 206. [2021-12-16 05:43:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 159 states have (on average 1.5534591194968554) internal successors, (247), 205 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 247 transitions. [2021-12-16 05:43:05,050 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 247 transitions. Word has length 12 [2021-12-16 05:43:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:05,050 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 247 transitions. [2021-12-16 05:43:05,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 247 transitions. [2021-12-16 05:43:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:43:05,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:05,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:05,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 05:43:05,051 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:05,051 INFO L85 PathProgramCache]: Analyzing trace with hash 467003056, now seen corresponding path program 1 times [2021-12-16 05:43:05,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:05,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740708065] [2021-12-16 05:43:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:05,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:05,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:05,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740708065] [2021-12-16 05:43:05,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740708065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:05,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:05,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:43:05,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013862547] [2021-12-16 05:43:05,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:05,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:43:05,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:05,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:43:05,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:43:05,193 INFO L87 Difference]: Start difference. First operand 206 states and 247 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:05,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:05,413 INFO L93 Difference]: Finished difference Result 202 states and 240 transitions. [2021-12-16 05:43:05,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:43:05,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-16 05:43:05,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:05,414 INFO L225 Difference]: With dead ends: 202 [2021-12-16 05:43:05,414 INFO L226 Difference]: Without dead ends: 202 [2021-12-16 05:43:05,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:43:05,415 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 15 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:05,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 434 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:43:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-16 05:43:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2021-12-16 05:43:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 154 states have (on average 1.5194805194805194) internal successors, (234), 195 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2021-12-16 05:43:05,419 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 12 [2021-12-16 05:43:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:05,419 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2021-12-16 05:43:05,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2021-12-16 05:43:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 05:43:05,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:05,420 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:05,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 05:43:05,420 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:05,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1270421215, now seen corresponding path program 1 times [2021-12-16 05:43:05,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:05,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525522013] [2021-12-16 05:43:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:05,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:43:05,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:05,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525522013] [2021-12-16 05:43:05,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525522013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:05,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:05,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:43:05,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887079678] [2021-12-16 05:43:05,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:05,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:43:05,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:05,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:43:05,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:43:05,464 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:05,564 INFO L93 Difference]: Finished difference Result 226 states and 249 transitions. [2021-12-16 05:43:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:43:05,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 05:43:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:05,566 INFO L225 Difference]: With dead ends: 226 [2021-12-16 05:43:05,566 INFO L226 Difference]: Without dead ends: 226 [2021-12-16 05:43:05,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:43:05,567 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 267 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:05,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 187 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:43:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-16 05:43:05,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 194. [2021-12-16 05:43:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 193 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 230 transitions. [2021-12-16 05:43:05,573 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 230 transitions. Word has length 21 [2021-12-16 05:43:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:05,573 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 230 transitions. [2021-12-16 05:43:05,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:05,574 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 230 transitions. [2021-12-16 05:43:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:43:05,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:05,574 INFO L514 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] [2021-12-16 05:43:05,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 05:43:05,574 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:05,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:05,575 INFO L85 PathProgramCache]: Analyzing trace with hash -697189136, now seen corresponding path program 1 times [2021-12-16 05:43:05,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:05,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244053290] [2021-12-16 05:43:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:05,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:05,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:05,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244053290] [2021-12-16 05:43:05,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244053290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:05,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955989489] [2021-12-16 05:43:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:05,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:05,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:43:05,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:43:05,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:43:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:05,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 05:43:05,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:05,908 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 [2021-12-16 05:43:05,991 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 05:43:05,991 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 [2021-12-16 05:43:06,052 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 11 treesize of output 7 [2021-12-16 05:43:06,201 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:06,201 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 31 treesize of output 29 [2021-12-16 05:43:06,274 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:06,275 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-16 05:43:06,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:06,456 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-16 05:43:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:06,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:06,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:06,896 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2021-12-16 05:43:06,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:06,911 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 34 treesize of output 37 [2021-12-16 05:43:06,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 9 [2021-12-16 05:43:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:07,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955989489] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:43:07,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:43:07,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2021-12-16 05:43:07,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425448102] [2021-12-16 05:43:07,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:07,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 05:43:07,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 05:43:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=739, Unknown=8, NotChecked=0, Total=870 [2021-12-16 05:43:07,841 INFO L87 Difference]: Start difference. First operand 194 states and 230 transitions. Second operand has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:08,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:08,757 INFO L93 Difference]: Finished difference Result 394 states and 451 transitions. [2021-12-16 05:43:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 05:43:08,757 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 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 [2021-12-16 05:43:08,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:08,758 INFO L225 Difference]: With dead ends: 394 [2021-12-16 05:43:08,759 INFO L226 Difference]: Without dead ends: 394 [2021-12-16 05:43:08,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=1544, Unknown=8, NotChecked=0, Total=1892 [2021-12-16 05:43:08,761 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 904 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 882 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:08,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 1268 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1081 Invalid, 0 Unknown, 882 Unchecked, 0.5s Time] [2021-12-16 05:43:08,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-12-16 05:43:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 216. [2021-12-16 05:43:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 175 states have (on average 1.4685714285714286) internal successors, (257), 215 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 257 transitions. [2021-12-16 05:43:08,766 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 257 transitions. Word has length 27 [2021-12-16 05:43:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:08,766 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 257 transitions. [2021-12-16 05:43:08,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 257 transitions. [2021-12-16 05:43:08,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:43:08,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:08,767 INFO L514 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] [2021-12-16 05:43:08,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:08,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:08,984 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:08,984 INFO L85 PathProgramCache]: Analyzing trace with hash -697189135, now seen corresponding path program 1 times [2021-12-16 05:43:08,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:08,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483278137] [2021-12-16 05:43:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:08,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:09,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:09,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483278137] [2021-12-16 05:43:09,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483278137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:09,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306271695] [2021-12-16 05:43:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:09,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:09,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:43:09,168 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:43:09,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:43:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:09,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-16 05:43:09,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:09,244 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 [2021-12-16 05:43:09,294 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 [2021-12-16 05:43:09,302 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:43:09,302 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 [2021-12-16 05:43:09,327 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 11 treesize of output 7 [2021-12-16 05:43:09,334 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 [2021-12-16 05:43:09,424 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:43:09,424 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 14 treesize of output 20 [2021-12-16 05:43:09,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-16 05:43:09,439 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:09,440 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 31 treesize of output 29 [2021-12-16 05:43:09,497 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:09,498 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-16 05:43:09,502 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 18 treesize of output 20 [2021-12-16 05:43:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:09,636 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-16 05:43:09,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:09,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 05:43:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:09,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:10,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:10,236 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-12-16 05:43:10,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:10,242 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2021-12-16 05:43:10,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:10,250 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 74 treesize of output 77 [2021-12-16 05:43:10,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:10,259 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 125 treesize of output 120 [2021-12-16 05:43:10,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 89 treesize of output 85 [2021-12-16 05:43:10,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 85 treesize of output 81 [2021-12-16 05:43:10,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 81 treesize of output 79 [2021-12-16 05:43:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:10,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306271695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:43:10,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:43:10,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2021-12-16 05:43:10,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848070515] [2021-12-16 05:43:10,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:10,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 05:43:10,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:10,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 05:43:10,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=878, Unknown=12, NotChecked=0, Total=992 [2021-12-16 05:43:10,668 INFO L87 Difference]: Start difference. First operand 216 states and 257 transitions. Second operand has 32 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 32 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) [2021-12-16 05:43:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:11,962 INFO L93 Difference]: Finished difference Result 393 states and 450 transitions. [2021-12-16 05:43:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-16 05:43:11,962 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 32 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 27 [2021-12-16 05:43:11,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:11,963 INFO L225 Difference]: With dead ends: 393 [2021-12-16 05:43:11,964 INFO L226 Difference]: Without dead ends: 393 [2021-12-16 05:43:11,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=418, Invalid=2326, Unknown=12, NotChecked=0, Total=2756 [2021-12-16 05:43:11,965 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1310 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:11,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 1144 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1147 Invalid, 0 Unknown, 635 Unchecked, 0.6s Time] [2021-12-16 05:43:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-16 05:43:11,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 216. [2021-12-16 05:43:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 175 states have (on average 1.4628571428571429) internal successors, (256), 215 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 256 transitions. [2021-12-16 05:43:11,970 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 256 transitions. Word has length 27 [2021-12-16 05:43:11,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:11,972 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 256 transitions. [2021-12-16 05:43:11,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 32 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) [2021-12-16 05:43:11,972 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 256 transitions. [2021-12-16 05:43:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 05:43:11,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:11,975 INFO L514 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] [2021-12-16 05:43:11,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:12,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 05:43:12,192 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:12,193 INFO L85 PathProgramCache]: Analyzing trace with hash 24881054, now seen corresponding path program 1 times [2021-12-16 05:43:12,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:12,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636925020] [2021-12-16 05:43:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:12,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:43:12,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636925020] [2021-12-16 05:43:12,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636925020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:12,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:12,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:43:12,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276442032] [2021-12-16 05:43:12,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:12,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:12,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:12,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:12,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:12,224 INFO L87 Difference]: Start difference. First operand 216 states and 256 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:12,229 INFO L93 Difference]: Finished difference Result 218 states and 258 transitions. [2021-12-16 05:43:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:12,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-12-16 05:43:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:12,230 INFO L225 Difference]: With dead ends: 218 [2021-12-16 05:43:12,230 INFO L226 Difference]: Without dead ends: 218 [2021-12-16 05:43:12,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:12,231 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 0 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:12,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 272 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:43:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-16 05:43:12,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-12-16 05:43:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 177 states have (on average 1.4576271186440677) internal successors, (258), 217 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 258 transitions. [2021-12-16 05:43:12,234 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 258 transitions. Word has length 29 [2021-12-16 05:43:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:12,235 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 258 transitions. [2021-12-16 05:43:12,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 258 transitions. [2021-12-16 05:43:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 05:43:12,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:12,236 INFO L514 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, 1, 1] [2021-12-16 05:43:12,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 05:43:12,236 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:12,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash -197373836, now seen corresponding path program 1 times [2021-12-16 05:43:12,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:12,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577028611] [2021-12-16 05:43:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:12,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:43:12,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:12,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577028611] [2021-12-16 05:43:12,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577028611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:12,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:12,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:43:12,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654515946] [2021-12-16 05:43:12,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:12,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:43:12,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:43:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:43:12,270 INFO L87 Difference]: Start difference. First operand 218 states and 258 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:12,458 INFO L93 Difference]: Finished difference Result 243 states and 288 transitions. [2021-12-16 05:43:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:43:12,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-16 05:43:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:12,459 INFO L225 Difference]: With dead ends: 243 [2021-12-16 05:43:12,459 INFO L226 Difference]: Without dead ends: 243 [2021-12-16 05:43:12,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:43:12,460 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 109 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:12,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 345 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:43:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-16 05:43:12,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 217. [2021-12-16 05:43:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 177 states have (on average 1.4519774011299436) internal successors, (257), 216 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 257 transitions. [2021-12-16 05:43:12,463 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 257 transitions. Word has length 32 [2021-12-16 05:43:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:12,463 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 257 transitions. [2021-12-16 05:43:12,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 257 transitions. [2021-12-16 05:43:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 05:43:12,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:12,464 INFO L514 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, 1, 1] [2021-12-16 05:43:12,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 05:43:12,464 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash -197373835, now seen corresponding path program 1 times [2021-12-16 05:43:12,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:12,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921032302] [2021-12-16 05:43:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:12,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:12,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:12,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921032302] [2021-12-16 05:43:12,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921032302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:12,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577221425] [2021-12-16 05:43:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:12,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:12,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:43:12,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:43:12,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:43:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:12,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 05:43:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:12,769 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 [2021-12-16 05:43:12,831 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:43:12,831 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 [2021-12-16 05:43:12,862 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 11 treesize of output 7 [2021-12-16 05:43:12,866 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 [2021-12-16 05:43:12,900 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 16 treesize of output 8 [2021-12-16 05:43:12,954 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 14 treesize of output 16 [2021-12-16 05:43:12,982 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 14 treesize of output 16 [2021-12-16 05:43:13,152 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 23 treesize of output 15 [2021-12-16 05:43:13,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:13,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:13,156 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 26 treesize of output 17 [2021-12-16 05:43:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:13,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:13,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:13,282 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 31 treesize of output 35 [2021-12-16 05:43:13,444 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.offset_74| Int) (v_ArrVal_423 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~x~0#1.offset_74| 0) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_74|) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_423) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_74|)))) is different from false [2021-12-16 05:43:13,488 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.offset_74| Int) (v_ArrVal_423 (Array Int Int))) (or (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_423) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_74|)) (< |v_ULTIMATE.start_main_~x~0#1.offset_74| 0) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_74|))) is different from false [2021-12-16 05:43:13,499 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.offset_74| Int) (v_ArrVal_423 (Array Int Int))) (or (<= 0 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_423) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_74|)) (< |v_ULTIMATE.start_main_~x~0#1.offset_74| 0) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_74|))) is different from false [2021-12-16 05:43:13,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:13,518 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-16 05:43:13,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:13,527 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 33 [2021-12-16 05:43:13,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-12-16 05:43:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:13,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577221425] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:43:13,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:43:13,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2021-12-16 05:43:13,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863927266] [2021-12-16 05:43:13,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:13,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 05:43:13,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 05:43:13,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1260, Unknown=3, NotChecked=222, Total=1640 [2021-12-16 05:43:13,781 INFO L87 Difference]: Start difference. First operand 217 states and 257 transitions. Second operand has 41 states, 40 states have (on average 2.35) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:15,169 INFO L93 Difference]: Finished difference Result 353 states and 408 transitions. [2021-12-16 05:43:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-16 05:43:15,169 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 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 32 [2021-12-16 05:43:15,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:15,170 INFO L225 Difference]: With dead ends: 353 [2021-12-16 05:43:15,170 INFO L226 Difference]: Without dead ends: 353 [2021-12-16 05:43:15,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=717, Invalid=3984, Unknown=3, NotChecked=408, Total=5112 [2021-12-16 05:43:15,172 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 568 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 846 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:15,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 1641 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1397 Invalid, 0 Unknown, 846 Unchecked, 0.6s Time] [2021-12-16 05:43:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-16 05:43:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 239. [2021-12-16 05:43:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 205 states have (on average 1.3853658536585365) internal successors, (284), 238 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 284 transitions. [2021-12-16 05:43:15,176 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 284 transitions. Word has length 32 [2021-12-16 05:43:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:15,176 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 284 transitions. [2021-12-16 05:43:15,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 284 transitions. [2021-12-16 05:43:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 05:43:15,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:15,177 INFO L514 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, 1, 1] [2021-12-16 05:43:15,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:15,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:15,387 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:15,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:15,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1018847574, now seen corresponding path program 1 times [2021-12-16 05:43:15,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:15,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983127248] [2021-12-16 05:43:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:15,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:43:15,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:15,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983127248] [2021-12-16 05:43:15,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983127248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:15,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:15,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 05:43:15,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346653499] [2021-12-16 05:43:15,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:15,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:43:15,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:15,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:43:15,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:43:15,457 INFO L87 Difference]: Start difference. First operand 239 states and 284 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:15,590 INFO L93 Difference]: Finished difference Result 255 states and 302 transitions. [2021-12-16 05:43:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:43:15,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-16 05:43:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:15,592 INFO L225 Difference]: With dead ends: 255 [2021-12-16 05:43:15,592 INFO L226 Difference]: Without dead ends: 255 [2021-12-16 05:43:15,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:43:15,593 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 45 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:15,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 488 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:43:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-16 05:43:15,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 247. [2021-12-16 05:43:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 213 states have (on average 1.3708920187793427) internal successors, (292), 246 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 292 transitions. [2021-12-16 05:43:15,596 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 292 transitions. Word has length 32 [2021-12-16 05:43:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:15,596 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 292 transitions. [2021-12-16 05:43:15,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 292 transitions. [2021-12-16 05:43:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 05:43:15,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:15,596 INFO L514 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, 1, 1] [2021-12-16 05:43:15,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 05:43:15,597 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1018907156, now seen corresponding path program 1 times [2021-12-16 05:43:15,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:15,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503075983] [2021-12-16 05:43:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:15,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:43:15,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:15,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503075983] [2021-12-16 05:43:15,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503075983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:15,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:15,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:43:15,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299718304] [2021-12-16 05:43:15,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:15,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:15,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:15,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:15,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:15,626 INFO L87 Difference]: Start difference. First operand 247 states and 292 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:15,673 INFO L93 Difference]: Finished difference Result 245 states and 287 transitions. [2021-12-16 05:43:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:15,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-16 05:43:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:15,676 INFO L225 Difference]: With dead ends: 245 [2021-12-16 05:43:15,676 INFO L226 Difference]: Without dead ends: 245 [2021-12-16 05:43:15,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:15,680 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 67 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:15,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 152 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:43:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-16 05:43:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2021-12-16 05:43:15,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 213 states have (on average 1.3474178403755868) internal successors, (287), 243 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 287 transitions. [2021-12-16 05:43:15,687 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 287 transitions. Word has length 32 [2021-12-16 05:43:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:15,688 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 287 transitions. [2021-12-16 05:43:15,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,688 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 287 transitions. [2021-12-16 05:43:15,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 05:43:15,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:15,689 INFO L514 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, 1, 1] [2021-12-16 05:43:15,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 05:43:15,689 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:15,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1018907157, now seen corresponding path program 1 times [2021-12-16 05:43:15,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:15,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936810507] [2021-12-16 05:43:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:15,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:43:15,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:15,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936810507] [2021-12-16 05:43:15,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936810507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:15,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:15,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:43:15,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114450613] [2021-12-16 05:43:15,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:15,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:15,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:15,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:15,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:15,737 INFO L87 Difference]: Start difference. First operand 244 states and 287 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:15,782 INFO L93 Difference]: Finished difference Result 241 states and 282 transitions. [2021-12-16 05:43:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:15,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-16 05:43:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:15,784 INFO L225 Difference]: With dead ends: 241 [2021-12-16 05:43:15,784 INFO L226 Difference]: Without dead ends: 241 [2021-12-16 05:43:15,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:15,785 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 72 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:15,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 136 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:43:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-16 05:43:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-12-16 05:43:15,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 213 states have (on average 1.323943661971831) internal successors, (282), 240 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 282 transitions. [2021-12-16 05:43:15,790 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 282 transitions. Word has length 32 [2021-12-16 05:43:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:15,791 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 282 transitions. [2021-12-16 05:43:15,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 282 transitions. [2021-12-16 05:43:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-16 05:43:15,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:15,792 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:15,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 05:43:15,792 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash 948343841, now seen corresponding path program 1 times [2021-12-16 05:43:15,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:15,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776533194] [2021-12-16 05:43:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:15,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:43:15,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:15,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776533194] [2021-12-16 05:43:15,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776533194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:15,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:15,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:43:15,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339043604] [2021-12-16 05:43:15,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:15,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:43:15,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:15,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:43:15,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:43:15,853 INFO L87 Difference]: Start difference. First operand 241 states and 282 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:16,057 INFO L93 Difference]: Finished difference Result 261 states and 303 transitions. [2021-12-16 05:43:16,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:43:16,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-16 05:43:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:16,059 INFO L225 Difference]: With dead ends: 261 [2021-12-16 05:43:16,059 INFO L226 Difference]: Without dead ends: 261 [2021-12-16 05:43:16,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:43:16,060 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 92 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:16,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 321 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:43:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-16 05:43:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 247. [2021-12-16 05:43:16,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 219 states have (on average 1.3287671232876712) internal successors, (291), 246 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:16,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 291 transitions. [2021-12-16 05:43:16,065 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 291 transitions. Word has length 36 [2021-12-16 05:43:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:16,065 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 291 transitions. [2021-12-16 05:43:16,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:16,065 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 291 transitions. [2021-12-16 05:43:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-16 05:43:16,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:16,067 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:16,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 05:43:16,067 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:16,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:16,068 INFO L85 PathProgramCache]: Analyzing trace with hash 948343842, now seen corresponding path program 1 times [2021-12-16 05:43:16,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:16,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082794466] [2021-12-16 05:43:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:16,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:16,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:16,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082794466] [2021-12-16 05:43:16,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082794466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:16,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026360272] [2021-12-16 05:43:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:16,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:16,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:43:16,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:43:16,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:43:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:16,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 05:43:16,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:16,509 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 23 treesize of output 15 [2021-12-16 05:43:16,511 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 28 treesize of output 16 [2021-12-16 05:43:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:43:16,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:16,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026360272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:16,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:43:16,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 18 [2021-12-16 05:43:16,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034473905] [2021-12-16 05:43:16,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:16,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:43:16,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:16,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:43:16,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:43:16,546 INFO L87 Difference]: Start difference. First operand 247 states and 291 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:16,719 INFO L93 Difference]: Finished difference Result 256 states and 298 transitions. [2021-12-16 05:43:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:43:16,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-16 05:43:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:16,720 INFO L225 Difference]: With dead ends: 256 [2021-12-16 05:43:16,720 INFO L226 Difference]: Without dead ends: 256 [2021-12-16 05:43:16,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-12-16 05:43:16,721 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 53 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:16,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 389 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:43:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-16 05:43:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 245. [2021-12-16 05:43:16,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 219 states have (on average 1.3059360730593608) internal successors, (286), 244 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 286 transitions. [2021-12-16 05:43:16,724 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 286 transitions. Word has length 36 [2021-12-16 05:43:16,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:16,724 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 286 transitions. [2021-12-16 05:43:16,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:16,725 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 286 transitions. [2021-12-16 05:43:16,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-16 05:43:16,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:16,725 INFO L514 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] [2021-12-16 05:43:16,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-16 05:43:16,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 05:43:16,933 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:16,933 INFO L85 PathProgramCache]: Analyzing trace with hash -468812102, now seen corresponding path program 1 times [2021-12-16 05:43:16,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:16,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014092365] [2021-12-16 05:43:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:16,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:17,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:17,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014092365] [2021-12-16 05:43:17,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014092365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:17,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788263038] [2021-12-16 05:43:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:17,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:43:17,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:43:17,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:43:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-16 05:43:17,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:17,254 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 [2021-12-16 05:43:17,320 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:43:17,320 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 [2021-12-16 05:43:17,347 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 11 treesize of output 7 [2021-12-16 05:43:17,352 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 [2021-12-16 05:43:17,455 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-16 05:43:17,455 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 26 treesize of output 21 [2021-12-16 05:43:17,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:17,468 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-16 05:43:17,469 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 22 [2021-12-16 05:43:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:17,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:17,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:17,567 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 05:43:17,568 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 89 treesize of output 70 [2021-12-16 05:43:17,577 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-12-16 05:43:17,578 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2021-12-16 05:43:17,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:17,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:17,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:17,992 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-12-16 05:43:17,992 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 5 case distinctions, treesize of input 69 treesize of output 42 [2021-12-16 05:43:17,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:17,999 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:43:17,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2021-12-16 05:43:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:18,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:24,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:24,861 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 6 new quantified variables, introduced 10 case distinctions, treesize of input 7893 treesize of output 7398 [2021-12-16 05:43:25,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:25,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:26,534 INFO L354 Elim1Store]: treesize reduction 624, result has 48.3 percent of original size [2021-12-16 05:43:26,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 92 case distinctions, treesize of input 35767 treesize of output 33332 [2021-12-16 05:43:28,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:28,668 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 30096 treesize of output 30172 [2021-12-16 05:43:30,943 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-16 05:43:30,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:43:30,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-16 05:43:30,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428188965] [2021-12-16 05:43:30,944 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:30,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 05:43:30,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:30,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 05:43:30,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1017, Unknown=3, NotChecked=0, Total=1122 [2021-12-16 05:43:30,945 INFO L87 Difference]: Start difference. First operand 245 states and 286 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-12-16 05:43:32,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:32,308 INFO L93 Difference]: Finished difference Result 406 states and 465 transitions. [2021-12-16 05:43:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-16 05:43:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 36 [2021-12-16 05:43:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:32,311 INFO L225 Difference]: With dead ends: 406 [2021-12-16 05:43:32,312 INFO L226 Difference]: Without dead ends: 406 [2021-12-16 05:43:32,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=321, Invalid=2868, Unknown=3, NotChecked=0, Total=3192 [2021-12-16 05:43:32,313 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 622 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:32,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 890 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 05:43:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-12-16 05:43:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 252. [2021-12-16 05:43:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 226 states have (on average 1.3008849557522124) internal successors, (294), 251 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:32,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 294 transitions. [2021-12-16 05:43:32,320 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 294 transitions. Word has length 36 [2021-12-16 05:43:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:32,321 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 294 transitions. [2021-12-16 05:43:32,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-12-16 05:43:32,321 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 294 transitions. [2021-12-16 05:43:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-16 05:43:32,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:32,322 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:32,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 05:43:32,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:32,535 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash 825367841, now seen corresponding path program 1 times [2021-12-16 05:43:32,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:32,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271710318] [2021-12-16 05:43:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:32,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:32,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:32,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271710318] [2021-12-16 05:43:32,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271710318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:32,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135044056] [2021-12-16 05:43:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:32,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:32,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:43:32,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:43:32,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:43:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:32,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-16 05:43:32,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:32,938 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 [2021-12-16 05:43:32,971 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:43:32,972 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 [2021-12-16 05:43:33,003 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 [2021-12-16 05:43:33,007 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 11 treesize of output 7 [2021-12-16 05:43:33,128 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:33,128 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 22 treesize of output 22 [2021-12-16 05:43:33,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:33,134 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 21 treesize of output 21 [2021-12-16 05:43:33,186 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:33,187 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2021-12-16 05:43:33,190 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 18 treesize of output 20 [2021-12-16 05:43:33,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-16 05:43:33,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:33,405 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-16 05:43:33,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:33,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 05:43:33,425 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 [2021-12-16 05:43:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:33,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:33,574 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 77 treesize of output 57 [2021-12-16 05:43:33,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:33,981 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 68 [2021-12-16 05:43:33,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:33,987 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 60 [2021-12-16 05:43:33,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:33,995 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 71 treesize of output 74 [2021-12-16 05:43:34,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:34,004 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 96 treesize of output 95 [2021-12-16 05:43:34,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 64 treesize of output 62 [2021-12-16 05:43:34,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 60 [2021-12-16 05:43:34,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 60 treesize of output 58 [2021-12-16 05:43:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:34,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135044056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:43:34,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:43:34,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-12-16 05:43:34,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934385123] [2021-12-16 05:43:34,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:34,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 05:43:34,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:34,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 05:43:34,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=946, Unknown=4, NotChecked=0, Total=1056 [2021-12-16 05:43:34,352 INFO L87 Difference]: Start difference. First operand 252 states and 294 transitions. Second operand has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:35,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:35,177 INFO L93 Difference]: Finished difference Result 311 states and 361 transitions. [2021-12-16 05:43:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 05:43:35,178 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-16 05:43:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:35,179 INFO L225 Difference]: With dead ends: 311 [2021-12-16 05:43:35,179 INFO L226 Difference]: Without dead ends: 311 [2021-12-16 05:43:35,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=2079, Unknown=4, NotChecked=0, Total=2352 [2021-12-16 05:43:35,180 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 448 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 413 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:35,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 1254 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 694 Invalid, 0 Unknown, 413 Unchecked, 0.3s Time] [2021-12-16 05:43:35,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-16 05:43:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 260. [2021-12-16 05:43:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 234 states have (on average 1.2991452991452992) internal successors, (304), 259 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:35,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 304 transitions. [2021-12-16 05:43:35,184 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 304 transitions. Word has length 38 [2021-12-16 05:43:35,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:35,185 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 304 transitions. [2021-12-16 05:43:35,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 304 transitions. [2021-12-16 05:43:35,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-16 05:43:35,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:35,186 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:35,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:35,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:35,395 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash -247701985, now seen corresponding path program 2 times [2021-12-16 05:43:35,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:43:35,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206277616] [2021-12-16 05:43:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:35,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:43:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:35,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:43:35,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206277616] [2021-12-16 05:43:35,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206277616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:35,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554893292] [2021-12-16 05:43:35,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:43:35,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:35,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:43:35,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:43:35,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 05:43:35,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:43:35,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:43:35,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-16 05:43:35,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:35,703 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 [2021-12-16 05:43:35,768 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:43:35,768 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 [2021-12-16 05:43:35,801 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 11 treesize of output 7 [2021-12-16 05:43:35,891 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:35,892 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 22 treesize of output 22 [2021-12-16 05:43:35,928 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:35,929 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 22 treesize of output 22 [2021-12-16 05:43:35,952 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:43:35,952 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 [2021-12-16 05:43:35,992 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-16 05:43:35,992 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 27 treesize of output 22 [2021-12-16 05:43:36,117 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-16 05:43:36,117 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 3 case distinctions, treesize of input 47 treesize of output 49 [2021-12-16 05:43:36,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 8 [2021-12-16 05:43:36,238 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-16 05:43:36,239 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 56 treesize of output 56 [2021-12-16 05:43:36,241 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-16 05:43:36,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:43:36,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-16 05:43:36,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983803880] [2021-12-16 05:43:36,242 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:36,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:43:36,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:43:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:43:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-12-16 05:43:36,243 INFO L87 Difference]: Start difference. First operand 260 states and 304 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 05:43:36,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-12-16 05:43:36,245 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:36,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:43:36,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-16 05:43:36,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:43:36,464 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@17aac358 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-12-16 05:43:36,467 INFO L158 Benchmark]: Toolchain (without parser) took 34216.48ms. Allocated memory was 111.1MB in the beginning and 570.4MB in the end (delta: 459.3MB). Free memory was 75.3MB in the beginning and 299.0MB in the end (delta: -223.7MB). Peak memory consumption was 235.6MB. Max. memory is 16.1GB. [2021-12-16 05:43:36,468 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 111.1MB. Free memory was 86.4MB in the beginning and 86.3MB in the end (delta: 27.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 05:43:36,468 INFO L158 Benchmark]: CACSL2BoogieTranslator took 412.34ms. Allocated memory is still 111.1MB. Free memory was 75.0MB in the beginning and 78.4MB in the end (delta: -3.4MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2021-12-16 05:43:36,468 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.58ms. Allocated memory is still 111.1MB. Free memory was 78.4MB in the beginning and 75.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 05:43:36,468 INFO L158 Benchmark]: Boogie Preprocessor took 40.13ms. Allocated memory is still 111.1MB. Free memory was 75.8MB in the beginning and 74.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 05:43:36,468 INFO L158 Benchmark]: RCFGBuilder took 460.92ms. Allocated memory is still 111.1MB. Free memory was 74.2MB in the beginning and 52.7MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-12-16 05:43:36,468 INFO L158 Benchmark]: TraceAbstraction took 33244.28ms. Allocated memory was 111.1MB in the beginning and 570.4MB in the end (delta: 459.3MB). Free memory was 52.2MB in the beginning and 299.0MB in the end (delta: -246.9MB). Peak memory consumption was 213.0MB. Max. memory is 16.1GB. [2021-12-16 05:43:36,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 111.1MB. Free memory was 86.4MB in the beginning and 86.3MB in the end (delta: 27.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 412.34ms. Allocated memory is still 111.1MB. Free memory was 75.0MB in the beginning and 78.4MB in the end (delta: -3.4MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.58ms. Allocated memory is still 111.1MB. Free memory was 78.4MB in the beginning and 75.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.13ms. Allocated memory is still 111.1MB. Free memory was 75.8MB in the beginning and 74.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 460.92ms. Allocated memory is still 111.1MB. Free memory was 74.2MB in the beginning and 52.7MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 33244.28ms. Allocated memory was 111.1MB in the beginning and 570.4MB in the end (delta: 459.3MB). Free memory was 52.2MB in the beginning and 299.0MB in the end (delta: -246.9MB). Peak memory consumption was 213.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@17aac358 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@17aac358: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-16 05:43:36,492 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 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/forester-heap/sll-sorted-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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 valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e45b14428dafe2f20aeac8c38d2592befc15b6791b0365935474ded4fd47d0f2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:43:38,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:43:38,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:43:38,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:43:38,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:43:38,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:43:38,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:43:38,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:43:38,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:43:38,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:43:38,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:43:38,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:43:38,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:43:38,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:43:38,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:43:38,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:43:38,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:43:38,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:43:38,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:43:38,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:43:38,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:43:38,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:43:38,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:43:38,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:43:38,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:43:38,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:43:38,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:43:38,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:43:38,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:43:38,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:43:38,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:43:38,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:43:38,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:43:38,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:43:38,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:43:38,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:43:38,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:43:38,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:43:38,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:43:38,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:43:38,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:43:38,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-12-16 05:43:38,436 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:43:38,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:43:38,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:43:38,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:43:38,438 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:43:38,438 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:43:38,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:43:38,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:43:38,440 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:43:38,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:43:38,440 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:43:38,441 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:43:38,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:43:38,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:43:38,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:43:38,441 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:43:38,441 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:43:38,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:43:38,441 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:43:38,442 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 05:43:38,442 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 05:43:38,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:43:38,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:43:38,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:43:38,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:43:38,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:43:38,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:43:38,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:43:38,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:43:38,443 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 05:43:38,443 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 05:43:38,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:43:38,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 05:43:38,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e45b14428dafe2f20aeac8c38d2592befc15b6791b0365935474ded4fd47d0f2 [2021-12-16 05:43:38,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:43:38,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:43:38,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:43:38,764 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:43:38,765 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:43:38,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-sorted-1.i [2021-12-16 05:43:38,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3f74887/f08c5b0188e54a9289f5786107517bed/FLAG405e0e94a [2021-12-16 05:43:39,260 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:43:39,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i [2021-12-16 05:43:39,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3f74887/f08c5b0188e54a9289f5786107517bed/FLAG405e0e94a [2021-12-16 05:43:39,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3f74887/f08c5b0188e54a9289f5786107517bed [2021-12-16 05:43:39,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:43:39,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:43:39,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:43:39,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:43:39,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:43:39,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@560995e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39, skipping insertion in model container [2021-12-16 05:43:39,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:43:39,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:43:39,576 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22317,22330] [2021-12-16 05:43:39,582 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22547,22560] [2021-12-16 05:43:39,588 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22877,22890] [2021-12-16 05:43:39,589 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22941,22954] [2021-12-16 05:43:39,593 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23072,23085] [2021-12-16 05:43:39,593 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23136,23149] [2021-12-16 05:43:39,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:43:39,612 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:43:39,644 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22317,22330] [2021-12-16 05:43:39,651 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22547,22560] [2021-12-16 05:43:39,655 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22877,22890] [2021-12-16 05:43:39,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22941,22954] [2021-12-16 05:43:39,657 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23072,23085] [2021-12-16 05:43:39,658 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23136,23149] [2021-12-16 05:43:39,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:43:39,684 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:43:39,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39 WrapperNode [2021-12-16 05:43:39,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:43:39,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:43:39,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:43:39,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:43:39,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,743 INFO L137 Inliner]: procedures = 122, calls = 39, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 182 [2021-12-16 05:43:39,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:43:39,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:43:39,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:43:39,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:43:39,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:43:39,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:43:39,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:43:39,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:43:39,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39" (1/1) ... [2021-12-16 05:43:39,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:43:39,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:43:39,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 05:43:39,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 05:43:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 05:43:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 05:43:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 05:43:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 05:43:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 05:43:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:43:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 05:43:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 05:43:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:43:39,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:43:39,940 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:43:39,941 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:43:40,453 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:43:40,462 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:43:40,475 INFO L301 CfgBuilder]: Removed 18 assume(true) statements. [2021-12-16 05:43:40,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:43:40 BoogieIcfgContainer [2021-12-16 05:43:40,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:43:40,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:43:40,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:43:40,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:43:40,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:43:39" (1/3) ... [2021-12-16 05:43:40,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0299ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:43:40, skipping insertion in model container [2021-12-16 05:43:40,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:39" (2/3) ... [2021-12-16 05:43:40,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0299ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:43:40, skipping insertion in model container [2021-12-16 05:43:40,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:43:40" (3/3) ... [2021-12-16 05:43:40,483 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-sorted-1.i [2021-12-16 05:43:40,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:43:40,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2021-12-16 05:43:40,540 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:43:40,556 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 05:43:40,557 INFO L340 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2021-12-16 05:43:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 86 states have (on average 2.197674418604651) internal successors, (189), 154 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 05:43:40,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:40,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 05:43:40,578 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:40,582 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-16 05:43:40,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:40,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274556108] [2021-12-16 05:43:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:40,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:40,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:40,593 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) [2021-12-16 05:43:40,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 05:43:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:40,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:43:40,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:40,715 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 [2021-12-16 05:43:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:40,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:40,723 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:40,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274556108] [2021-12-16 05:43:40,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274556108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:40,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:40,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:43:40,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150788766] [2021-12-16 05:43:40,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:40,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:40,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:40,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:40,752 INFO L87 Difference]: Start difference. First operand has 155 states, 86 states have (on average 2.197674418604651) internal successors, (189), 154 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:40,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:40,919 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2021-12-16 05:43:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-16 05:43:40,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:40,928 INFO L225 Difference]: With dead ends: 159 [2021-12-16 05:43:40,929 INFO L226 Difference]: Without dead ends: 155 [2021-12-16 05:43:40,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:40,932 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:40,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 106 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:43:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-16 05:43:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-12-16 05:43:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 150 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2021-12-16 05:43:40,977 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 3 [2021-12-16 05:43:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:40,978 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2021-12-16 05:43:40,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2021-12-16 05:43:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 05:43:40,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:40,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 05:43:40,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:41,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:41,185 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:41,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:41,185 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-16 05:43:41,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:41,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870747001] [2021-12-16 05:43:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:41,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:41,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:41,189 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) [2021-12-16 05:43:41,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 05:43:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:41,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:43:41,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:41,236 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 [2021-12-16 05:43:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:41,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:41,245 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:41,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870747001] [2021-12-16 05:43:41,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870747001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:41,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:41,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:43:41,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195409242] [2021-12-16 05:43:41,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:41,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:41,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:41,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:41,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:41,261 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:41,428 INFO L93 Difference]: Finished difference Result 153 states and 163 transitions. [2021-12-16 05:43:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:41,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-16 05:43:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:41,430 INFO L225 Difference]: With dead ends: 153 [2021-12-16 05:43:41,430 INFO L226 Difference]: Without dead ends: 153 [2021-12-16 05:43:41,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:41,431 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 144 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:41,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 104 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:43:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-16 05:43:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2021-12-16 05:43:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 85 states have (on average 1.8705882352941177) internal successors, (159), 148 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 159 transitions. [2021-12-16 05:43:41,437 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 159 transitions. Word has length 3 [2021-12-16 05:43:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:41,437 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 159 transitions. [2021-12-16 05:43:41,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 159 transitions. [2021-12-16 05:43:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:43:41,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:41,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:41,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:41,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:41,644 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:41,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1803027173, now seen corresponding path program 1 times [2021-12-16 05:43:41,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:41,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079711650] [2021-12-16 05:43:41,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:41,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:41,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:41,647 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) [2021-12-16 05:43:41,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 05:43:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:41,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:43:41,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:41,733 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 [2021-12-16 05:43:41,764 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 05:43:41,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 20 [2021-12-16 05:43:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:41,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:41,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:41,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079711650] [2021-12-16 05:43:41,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079711650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:41,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:41,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:43:41,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448471970] [2021-12-16 05:43:41,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:41,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:43:41,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:43:41,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:43:41,777 INFO L87 Difference]: Start difference. First operand 149 states and 159 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2021-12-16 05:43:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:42,035 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2021-12-16 05:43:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:43:42,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 [2021-12-16 05:43:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:42,036 INFO L225 Difference]: With dead ends: 158 [2021-12-16 05:43:42,036 INFO L226 Difference]: Without dead ends: 158 [2021-12-16 05:43:42,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:43:42,037 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 255 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:42,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 79 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:43:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-16 05:43:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2021-12-16 05:43:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 99 states have (on average 1.696969696969697) internal successors, (168), 146 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 168 transitions. [2021-12-16 05:43:42,043 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 168 transitions. Word has length 7 [2021-12-16 05:43:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:42,043 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 168 transitions. [2021-12-16 05:43:42,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2021-12-16 05:43:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 168 transitions. [2021-12-16 05:43:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:43:42,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:42,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:42,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:42,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:42,251 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:42,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:42,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1803027174, now seen corresponding path program 1 times [2021-12-16 05:43:42,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:42,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012508761] [2021-12-16 05:43:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:42,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:42,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:42,254 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) [2021-12-16 05:43:42,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 05:43:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:42,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:43:42,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:42,314 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 [2021-12-16 05:43:42,361 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:42,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-16 05:43:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:42,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:42,376 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:42,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012508761] [2021-12-16 05:43:42,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012508761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:42,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:42,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:43:42,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137660274] [2021-12-16 05:43:42,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:42,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:43:42,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:42,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:43:42,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:43:42,378 INFO L87 Difference]: Start difference. First operand 147 states and 168 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2021-12-16 05:43:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:42,736 INFO L93 Difference]: Finished difference Result 222 states and 244 transitions. [2021-12-16 05:43:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:43:42,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 [2021-12-16 05:43:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:42,737 INFO L225 Difference]: With dead ends: 222 [2021-12-16 05:43:42,737 INFO L226 Difference]: Without dead ends: 222 [2021-12-16 05:43:42,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:43:42,738 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 287 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:42,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 128 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:43:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-16 05:43:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 190. [2021-12-16 05:43:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 142 states have (on average 1.591549295774648) internal successors, (226), 189 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2021-12-16 05:43:42,745 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 7 [2021-12-16 05:43:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:42,745 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2021-12-16 05:43:42,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2021-12-16 05:43:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2021-12-16 05:43:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 05:43:42,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:42,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:42,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:42,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:42,952 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:42,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1837264999, now seen corresponding path program 1 times [2021-12-16 05:43:42,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:42,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658084702] [2021-12-16 05:43:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:42,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:42,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:42,954 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:43:42,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 05:43:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:43,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 05:43:43,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:43,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:43,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:43,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658084702] [2021-12-16 05:43:43,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658084702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:43,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:43,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:43:43,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091783168] [2021-12-16 05:43:43,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:43,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:43,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:43,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:43,037 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:43,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:43,059 INFO L93 Difference]: Finished difference Result 228 states and 267 transitions. [2021-12-16 05:43:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:43,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 05:43:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:43,062 INFO L225 Difference]: With dead ends: 228 [2021-12-16 05:43:43,062 INFO L226 Difference]: Without dead ends: 228 [2021-12-16 05:43:43,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:43,064 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 101 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:43,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 204 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:43:43,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-16 05:43:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 198. [2021-12-16 05:43:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 150 states have (on average 1.5866666666666667) internal successors, (238), 197 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 238 transitions. [2021-12-16 05:43:43,073 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 238 transitions. Word has length 9 [2021-12-16 05:43:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:43,074 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 238 transitions. [2021-12-16 05:43:43,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 238 transitions. [2021-12-16 05:43:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:43:43,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:43,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:43,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:43,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:43,291 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:43,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash 406735527, now seen corresponding path program 1 times [2021-12-16 05:43:43,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:43,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737667538] [2021-12-16 05:43:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:43,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:43,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:43,293 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) [2021-12-16 05:43:43,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 05:43:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:43,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:43:43,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:43,375 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 [2021-12-16 05:43:43,385 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 [2021-12-16 05:43:43,398 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 12 [2021-12-16 05:43:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:43,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:43,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:43,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737667538] [2021-12-16 05:43:43,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737667538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:43,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:43,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:43:43,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581581236] [2021-12-16 05:43:43,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:43,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:43:43,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:43,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:43:43,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:43:43,421 INFO L87 Difference]: Start difference. First operand 198 states and 238 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:43,802 INFO L93 Difference]: Finished difference Result 204 states and 243 transitions. [2021-12-16 05:43:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:43:43,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:43:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:43,804 INFO L225 Difference]: With dead ends: 204 [2021-12-16 05:43:43,804 INFO L226 Difference]: Without dead ends: 204 [2021-12-16 05:43:43,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:43:43,804 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 95 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:43,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 331 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:43:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-16 05:43:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 197. [2021-12-16 05:43:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 150 states have (on average 1.5733333333333333) internal successors, (236), 196 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 236 transitions. [2021-12-16 05:43:43,809 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 236 transitions. Word has length 11 [2021-12-16 05:43:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:43,809 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 236 transitions. [2021-12-16 05:43:43,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 236 transitions. [2021-12-16 05:43:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:43:43,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:43,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:43,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-16 05:43:44,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:44,010 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:44,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:44,011 INFO L85 PathProgramCache]: Analyzing trace with hash 406735528, now seen corresponding path program 1 times [2021-12-16 05:43:44,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:44,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489389066] [2021-12-16 05:43:44,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:44,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:44,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:44,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:43:44,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 05:43:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:44,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 05:43:44,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:44,073 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 [2021-12-16 05:43:44,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-16 05:43:44,093 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 [2021-12-16 05:43:44,125 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 17 treesize of output 9 [2021-12-16 05:43:44,128 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 [2021-12-16 05:43:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:44,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:44,164 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:44,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489389066] [2021-12-16 05:43:44,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489389066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:44,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:44,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:43:44,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440157223] [2021-12-16 05:43:44,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:44,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:43:44,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:43:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:43:44,166 INFO L87 Difference]: Start difference. First operand 197 states and 236 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:44,836 INFO L93 Difference]: Finished difference Result 193 states and 229 transitions. [2021-12-16 05:43:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:43:44,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:43:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:44,838 INFO L225 Difference]: With dead ends: 193 [2021-12-16 05:43:44,839 INFO L226 Difference]: Without dead ends: 193 [2021-12-16 05:43:44,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:43:44,840 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 13 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:44,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 406 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:43:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-16 05:43:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2021-12-16 05:43:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 146 states have (on average 1.5342465753424657) internal successors, (224), 187 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 224 transitions. [2021-12-16 05:43:44,849 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 224 transitions. Word has length 11 [2021-12-16 05:43:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:44,849 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 224 transitions. [2021-12-16 05:43:44,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 224 transitions. [2021-12-16 05:43:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:43:44,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:44,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:44,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:45,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:45,060 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:45,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:45,060 INFO L85 PathProgramCache]: Analyzing trace with hash 415940479, now seen corresponding path program 1 times [2021-12-16 05:43:45,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:45,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621548138] [2021-12-16 05:43:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:45,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:45,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:45,063 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:43:45,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 05:43:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:45,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:43:45,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:43:45,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:45,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:45,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621548138] [2021-12-16 05:43:45,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621548138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:45,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:45,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:43:45,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623577712] [2021-12-16 05:43:45,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:45,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:43:45,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:45,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:43:45,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:43:45,191 INFO L87 Difference]: Start difference. First operand 188 states and 224 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:45,370 INFO L93 Difference]: Finished difference Result 217 states and 238 transitions. [2021-12-16 05:43:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:43:45,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2021-12-16 05:43:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:45,371 INFO L225 Difference]: With dead ends: 217 [2021-12-16 05:43:45,371 INFO L226 Difference]: Without dead ends: 217 [2021-12-16 05:43:45,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:43:45,371 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 257 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:45,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 177 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:43:45,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-16 05:43:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 186. [2021-12-16 05:43:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 145 states have (on average 1.5172413793103448) internal successors, (220), 185 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2021-12-16 05:43:45,374 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 18 [2021-12-16 05:43:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:45,375 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2021-12-16 05:43:45,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2021-12-16 05:43:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 05:43:45,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:45,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:45,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-16 05:43:45,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:45,576 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:45,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:45,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1799357454, now seen corresponding path program 1 times [2021-12-16 05:43:45,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:45,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464301878] [2021-12-16 05:43:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:45,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:45,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:45,582 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:43:45,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-16 05:43:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:45,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 05:43:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:45,731 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-16 05:43:45,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 21 [2021-12-16 05:43:45,851 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-12-16 05:43:45,852 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 30 treesize of output 47 [2021-12-16 05:43:45,933 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 11 treesize of output 7 [2021-12-16 05:43:46,086 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:46,086 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 52 treesize of output 48 [2021-12-16 05:43:46,152 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:46,152 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2021-12-16 05:43:46,331 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 46 treesize of output 30 [2021-12-16 05:43:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:46,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:46,448 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_182 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_182) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (_ bv1 1)))) is different from false [2021-12-16 05:43:46,465 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_182 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_182) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (_ bv1 1)))) is different from false [2021-12-16 05:43:46,473 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_182 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_182) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (_ bv1 1)))) is different from false [2021-12-16 05:43:46,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:46,484 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2021-12-16 05:43:46,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:46,494 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 38 treesize of output 41 [2021-12-16 05:43:46,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 11 [2021-12-16 05:43:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:54,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:54,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464301878] [2021-12-16 05:43:54,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464301878] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:43:54,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:43:54,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2021-12-16 05:43:54,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034497410] [2021-12-16 05:43:54,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:54,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 05:43:54,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:54,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 05:43:54,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=251, Unknown=5, NotChecked=102, Total=420 [2021-12-16 05:43:54,589 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 21 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) [2021-12-16 05:43:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:55,955 INFO L93 Difference]: Finished difference Result 261 states and 308 transitions. [2021-12-16 05:43:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 05:43:55,956 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 21 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 24 [2021-12-16 05:43:55,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:55,957 INFO L225 Difference]: With dead ends: 261 [2021-12-16 05:43:55,957 INFO L226 Difference]: Without dead ends: 261 [2021-12-16 05:43:55,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=137, Invalid=470, Unknown=5, NotChecked=144, Total=756 [2021-12-16 05:43:55,958 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 124 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 768 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:55,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 1038 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 477 Invalid, 0 Unknown, 768 Unchecked, 1.0s Time] [2021-12-16 05:43:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-16 05:43:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 205. [2021-12-16 05:43:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 164 states have (on average 1.4878048780487805) internal successors, (244), 204 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 244 transitions. [2021-12-16 05:43:55,964 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 244 transitions. Word has length 24 [2021-12-16 05:43:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:55,965 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 244 transitions. [2021-12-16 05:43:55,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 21 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) [2021-12-16 05:43:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 244 transitions. [2021-12-16 05:43:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 05:43:55,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:55,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:55,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:56,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:56,173 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:56,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1799357455, now seen corresponding path program 1 times [2021-12-16 05:43:56,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:56,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99610279] [2021-12-16 05:43:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:56,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:56,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:56,175 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:43:56,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 05:43:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:56,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 05:43:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:56,275 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 [2021-12-16 05:43:56,335 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 [2021-12-16 05:43:56,344 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:43:56,345 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 14 treesize of output 14 [2021-12-16 05:43:56,382 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 11 treesize of output 7 [2021-12-16 05:43:56,393 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 [2021-12-16 05:43:56,537 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:43:56,537 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 14 treesize of output 20 [2021-12-16 05:43:56,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-16 05:43:56,565 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:56,566 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 31 treesize of output 29 [2021-12-16 05:43:56,641 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:43:56,642 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-16 05:43:56,648 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 18 treesize of output 20 [2021-12-16 05:43:56,798 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 25 treesize of output 13 [2021-12-16 05:43:56,801 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 15 treesize of output 7 [2021-12-16 05:43:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:56,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:57,054 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_225 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_226 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_226 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32)))))) is different from false [2021-12-16 05:43:57,113 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_226 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_226) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32))))) (forall ((v_ArrVal_225 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_226 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_226) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_225) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2021-12-16 05:43:57,143 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_225 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_226 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_226) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_225) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) (forall ((v_ArrVal_226 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_226) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32)))))) is different from false [2021-12-16 05:43:57,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:57,170 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2021-12-16 05:43:57,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:57,178 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2021-12-16 05:43:57,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:57,192 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 52 treesize of output 55 [2021-12-16 05:43:57,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:57,210 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 82 treesize of output 81 [2021-12-16 05:43:57,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 66 treesize of output 62 [2021-12-16 05:43:57,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 28 [2021-12-16 05:43:57,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:57,626 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2021-12-16 05:43:57,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:57,638 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 44 treesize of output 43 [2021-12-16 05:43:57,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 [2021-12-16 05:43:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:58,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:58,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99610279] [2021-12-16 05:43:58,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99610279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:43:58,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:43:58,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-16 05:43:58,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022962586] [2021-12-16 05:43:58,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:58,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 05:43:58,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:58,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 05:43:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=227, Unknown=3, NotChecked=96, Total=380 [2021-12-16 05:43:58,005 INFO L87 Difference]: Start difference. First operand 205 states and 244 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:59,289 INFO L93 Difference]: Finished difference Result 266 states and 313 transitions. [2021-12-16 05:43:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:43:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 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 24 [2021-12-16 05:43:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:59,291 INFO L225 Difference]: With dead ends: 266 [2021-12-16 05:43:59,292 INFO L226 Difference]: Without dead ends: 266 [2021-12-16 05:43:59,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=343, Unknown=3, NotChecked=120, Total=552 [2021-12-16 05:43:59,298 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 113 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 632 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:59,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 819 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 442 Invalid, 0 Unknown, 632 Unchecked, 1.0s Time] [2021-12-16 05:43:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-16 05:43:59,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 205. [2021-12-16 05:43:59,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 204 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 243 transitions. [2021-12-16 05:43:59,305 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 243 transitions. Word has length 24 [2021-12-16 05:43:59,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:59,305 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 243 transitions. [2021-12-16 05:43:59,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 243 transitions. [2021-12-16 05:43:59,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 05:43:59,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:59,308 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 05:43:59,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:59,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:59,511 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:59,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1680564484, now seen corresponding path program 1 times [2021-12-16 05:43:59,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:59,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835724208] [2021-12-16 05:43:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:59,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:59,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:59,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:43:59,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-16 05:43:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:59,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 05:43:59,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:43:59,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:59,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:59,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835724208] [2021-12-16 05:43:59,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835724208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:59,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:59,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:43:59,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805173911] [2021-12-16 05:43:59,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:59,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:59,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:59,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:59,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:59,612 INFO L87 Difference]: Start difference. First operand 205 states and 243 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:59,619 INFO L93 Difference]: Finished difference Result 207 states and 245 transitions. [2021-12-16 05:43:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:59,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-16 05:43:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:59,620 INFO L225 Difference]: With dead ends: 207 [2021-12-16 05:43:59,620 INFO L226 Difference]: Without dead ends: 207 [2021-12-16 05:43:59,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:59,621 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:59,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 262 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:43:59,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-16 05:43:59,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-12-16 05:43:59,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 166 states have (on average 1.4759036144578312) internal successors, (245), 206 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:59,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 245 transitions. [2021-12-16 05:43:59,624 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 245 transitions. Word has length 26 [2021-12-16 05:43:59,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:59,625 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 245 transitions. [2021-12-16 05:43:59,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:59,625 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 245 transitions. [2021-12-16 05:43:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:43:59,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:59,625 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 05:43:59,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-16 05:43:59,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:59,832 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:43:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -559426830, now seen corresponding path program 1 times [2021-12-16 05:43:59,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:59,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914739348] [2021-12-16 05:43:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:59,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:59,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:59,834 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:43:59,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-16 05:43:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:59,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:43:59,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:59,943 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 [2021-12-16 05:43:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:43:59,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:59,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914739348] [2021-12-16 05:43:59,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914739348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:59,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:59,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:43:59,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122661656] [2021-12-16 05:43:59,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:59,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:59,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:59,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:59,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:59,948 INFO L87 Difference]: Start difference. First operand 207 states and 245 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 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) [2021-12-16 05:44:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:44:00,047 INFO L93 Difference]: Finished difference Result 205 states and 239 transitions. [2021-12-16 05:44:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:44:00,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 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 [2021-12-16 05:44:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:44:00,050 INFO L225 Difference]: With dead ends: 205 [2021-12-16 05:44:00,050 INFO L226 Difference]: Without dead ends: 205 [2021-12-16 05:44:00,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:44:00,050 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 70 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:44:00,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 152 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:44:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-16 05:44:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-12-16 05:44:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 166 states have (on average 1.4397590361445782) internal successors, (239), 203 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:44:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 239 transitions. [2021-12-16 05:44:00,053 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 239 transitions. Word has length 27 [2021-12-16 05:44:00,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:44:00,053 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 239 transitions. [2021-12-16 05:44:00,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 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) [2021-12-16 05:44:00,053 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 239 transitions. [2021-12-16 05:44:00,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:44:00,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:44:00,054 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 05:44:00,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-16 05:44:00,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:44:00,262 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:44:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:44:00,262 INFO L85 PathProgramCache]: Analyzing trace with hash -559426829, now seen corresponding path program 1 times [2021-12-16 05:44:00,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:44:00,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718263808] [2021-12-16 05:44:00,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:44:00,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:44:00,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:44:00,263 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:44:00,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-16 05:44:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:44:00,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:44:00,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:44:00,372 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 [2021-12-16 05:44:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:44:00,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:44:00,379 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:44:00,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718263808] [2021-12-16 05:44:00,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718263808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:44:00,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:44:00,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:44:00,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036371161] [2021-12-16 05:44:00,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:44:00,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:44:00,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:44:00,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:44:00,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:44:00,380 INFO L87 Difference]: Start difference. First operand 204 states and 239 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 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) [2021-12-16 05:44:00,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:44:00,514 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2021-12-16 05:44:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:44:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 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 [2021-12-16 05:44:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:44:00,515 INFO L225 Difference]: With dead ends: 201 [2021-12-16 05:44:00,515 INFO L226 Difference]: Without dead ends: 201 [2021-12-16 05:44:00,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:44:00,516 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 75 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:44:00,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 131 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:44:00,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-16 05:44:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-12-16 05:44:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 166 states have (on average 1.4036144578313252) internal successors, (233), 200 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:44:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 233 transitions. [2021-12-16 05:44:00,519 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 233 transitions. Word has length 27 [2021-12-16 05:44:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:44:00,519 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 233 transitions. [2021-12-16 05:44:00,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 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) [2021-12-16 05:44:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 233 transitions. [2021-12-16 05:44:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 05:44:00,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:44:00,520 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 05:44:00,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-16 05:44:00,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:44:00,728 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:44:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:44:00,729 INFO L85 PathProgramCache]: Analyzing trace with hash -162330586, now seen corresponding path program 1 times [2021-12-16 05:44:00,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:44:00,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392670590] [2021-12-16 05:44:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:44:00,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:44:00,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:44:00,748 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:44:00,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-16 05:44:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:44:00,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:44:00,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:44:00,926 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 [2021-12-16 05:44:00,928 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 [2021-12-16 05:44:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:44:00,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:44:00,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:44:00,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392670590] [2021-12-16 05:44:00,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392670590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:44:00,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:44:00,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:44:00,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118018235] [2021-12-16 05:44:00,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:44:00,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:44:00,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:44:00,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:44:00,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:44:00,954 INFO L87 Difference]: Start difference. First operand 201 states and 233 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:44:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:44:01,356 INFO L93 Difference]: Finished difference Result 210 states and 242 transitions. [2021-12-16 05:44:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:44:01,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-12-16 05:44:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:44:01,357 INFO L225 Difference]: With dead ends: 210 [2021-12-16 05:44:01,357 INFO L226 Difference]: Without dead ends: 210 [2021-12-16 05:44:01,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:44:01,358 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 25 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:44:01,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 388 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:44:01,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-16 05:44:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 205. [2021-12-16 05:44:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 170 states have (on average 1.4) internal successors, (238), 204 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:44:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 238 transitions. [2021-12-16 05:44:01,361 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 238 transitions. Word has length 28 [2021-12-16 05:44:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:44:01,361 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 238 transitions. [2021-12-16 05:44:01,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:44:01,361 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 238 transitions. [2021-12-16 05:44:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 05:44:01,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:44:01,362 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 05:44:01,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-16 05:44:01,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:44:01,576 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:44:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:44:01,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1957253996, now seen corresponding path program 1 times [2021-12-16 05:44:01,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:44:01,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803105713] [2021-12-16 05:44:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:44:01,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:44:01,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:44:01,579 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:44:01,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-16 05:44:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:44:01,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 05:44:01,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:44:01,706 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 11 [2021-12-16 05:44:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:44:01,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:44:01,726 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:44:01,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803105713] [2021-12-16 05:44:01,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803105713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:44:01,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:44:01,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:44:01,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609441526] [2021-12-16 05:44:01,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:44:01,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:44:01,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:44:01,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:44:01,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:44:01,727 INFO L87 Difference]: Start difference. First operand 205 states and 238 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 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) [2021-12-16 05:44:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:44:02,178 INFO L93 Difference]: Finished difference Result 221 states and 254 transitions. [2021-12-16 05:44:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:44:02,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 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 29 [2021-12-16 05:44:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:44:02,180 INFO L225 Difference]: With dead ends: 221 [2021-12-16 05:44:02,180 INFO L226 Difference]: Without dead ends: 221 [2021-12-16 05:44:02,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:44:02,182 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 95 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:44:02,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 291 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 05:44:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-16 05:44:02,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 204. [2021-12-16 05:44:02,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 170 states have (on average 1.3941176470588235) internal successors, (237), 203 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:44:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 237 transitions. [2021-12-16 05:44:02,202 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 237 transitions. Word has length 29 [2021-12-16 05:44:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:44:02,203 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 237 transitions. [2021-12-16 05:44:02,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 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) [2021-12-16 05:44:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 237 transitions. [2021-12-16 05:44:02,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 05:44:02,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:44:02,207 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 05:44:02,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-16 05:44:02,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:44:02,416 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:44:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:44:02,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1957253995, now seen corresponding path program 1 times [2021-12-16 05:44:02,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:44:02,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138128194] [2021-12-16 05:44:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:44:02,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:44:02,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:44:02,418 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:44:02,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-16 05:44:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:44:02,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 05:44:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:44:02,579 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 [2021-12-16 05:44:02,628 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:44:02,629 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 14 treesize of output 14 [2021-12-16 05:44:02,657 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 11 treesize of output 7 [2021-12-16 05:44:02,663 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 [2021-12-16 05:44:02,763 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:44:02,763 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 21 treesize of output 25 [2021-12-16 05:44:02,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-16 05:44:02,793 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:44:02,793 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 22 treesize of output 22 [2021-12-16 05:44:02,851 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:44:02,851 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2021-12-16 05:44:02,856 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 43 treesize of output 43 [2021-12-16 05:44:02,859 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 25 treesize of output 17 [2021-12-16 05:44:03,003 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 33 treesize of output 21 [2021-12-16 05:44:03,006 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 28 treesize of output 16 [2021-12-16 05:44:03,028 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 [2021-12-16 05:44:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:44:03,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:44:03,180 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 50 treesize of output 30 [2021-12-16 05:44:03,187 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_447 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_447) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (forall ((v_ArrVal_445 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_445) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~x~0#1.base|))) is different from false [2021-12-16 05:44:03,216 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_447 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_447) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_#t~mem4#1.offset|)) (forall ((v_ArrVal_445 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_445) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_#t~mem4#1.base|))) is different from false [2021-12-16 05:44:03,227 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_447 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_447) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (forall ((v_ArrVal_445 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_445) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) .cse0)))) is different from false [2021-12-16 05:44:03,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:44:03,241 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-16 05:44:03,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:44:03,249 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 33 [2021-12-16 05:44:03,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-12-16 05:44:03,275 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 05:44:03,275 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2021-12-16 05:44:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:44:03,376 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:44:03,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138128194] [2021-12-16 05:44:03,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138128194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:44:03,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:44:03,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-12-16 05:44:03,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882189469] [2021-12-16 05:44:03,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:44:03,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 05:44:03,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:44:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 05:44:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=336, Unknown=3, NotChecked=114, Total=506 [2021-12-16 05:44:03,377 INFO L87 Difference]: Start difference. First operand 204 states and 237 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-12-16 05:44:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:44:05,023 INFO L93 Difference]: Finished difference Result 350 states and 396 transitions. [2021-12-16 05:44:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:44:05,023 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 [2021-12-16 05:44:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:44:05,024 INFO L225 Difference]: With dead ends: 350 [2021-12-16 05:44:05,024 INFO L226 Difference]: Without dead ends: 350 [2021-12-16 05:44:05,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=805, Unknown=3, NotChecked=186, Total=1190 [2021-12-16 05:44:05,025 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 383 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 776 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:44:05,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 1184 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 854 Invalid, 0 Unknown, 776 Unchecked, 1.1s Time] [2021-12-16 05:44:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-16 05:44:05,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 206. [2021-12-16 05:44:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 172 states have (on average 1.3895348837209303) internal successors, (239), 205 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:44:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 239 transitions. [2021-12-16 05:44:05,028 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 239 transitions. Word has length 29 [2021-12-16 05:44:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:44:05,028 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 239 transitions. [2021-12-16 05:44:05,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-12-16 05:44:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 239 transitions. [2021-12-16 05:44:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 05:44:05,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:44:05,029 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 05:44:05,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-16 05:44:05,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:44:05,229 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-12-16 05:44:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:44:05,229 INFO L85 PathProgramCache]: Analyzing trace with hash 227020734, now seen corresponding path program 1 times [2021-12-16 05:44:05,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:44:05,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223265552] [2021-12-16 05:44:05,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:44:05,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:44:05,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:44:05,231 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:44:05,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-16 05:44:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:44:05,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 05:44:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:44:05,359 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 11