./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/list-simple/sll2c_insert_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b7b415e0519ab150e9247d3d9d0133f92cfd07c34f9918f9ebd19cf8109bf4e7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:04:40,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:04:40,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:04:40,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:04:40,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:04:40,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:04:40,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:04:40,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:04:40,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:04:40,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:04:40,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:04:40,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:04:40,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:04:40,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:04:40,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:04:40,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:04:40,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:04:40,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:04:40,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:04:40,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:04:40,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:04:40,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:04:40,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:04:40,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:04:40,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:04:40,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:04:40,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:04:40,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:04:40,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:04:40,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:04:40,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:04:40,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:04:40,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:04:40,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:04:40,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:04:40,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:04:40,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:04:40,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:04:40,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:04:40,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:04:40,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:04:40,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 06:04:40,180 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:04:40,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:04:40,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:04:40,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:04:40,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:04:40,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:04:40,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:04:40,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:04:40,185 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:04:40,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:04:40,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:04:40,186 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:04:40,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:04:40,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:04:40,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:04:40,187 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:04:40,187 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:04:40,187 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:04:40,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:04:40,187 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:04:40,187 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:04:40,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:04:40,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:04:40,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:04:40,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:04:40,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:04:40,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:04:40,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:04:40,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 06:04:40,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 06:04:40,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:04:40,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7b415e0519ab150e9247d3d9d0133f92cfd07c34f9918f9ebd19cf8109bf4e7 [2021-12-16 06:04:40,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:04:40,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:04:40,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:04:40,417 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:04:40,417 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:04:40,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_insert_unequal.i [2021-12-16 06:04:40,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceaf06f47/cc082a6511c94494a775672f5d61ee12/FLAGe77edb6c0 [2021-12-16 06:04:40,923 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:04:40,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_insert_unequal.i [2021-12-16 06:04:40,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceaf06f47/cc082a6511c94494a775672f5d61ee12/FLAGe77edb6c0 [2021-12-16 06:04:41,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceaf06f47/cc082a6511c94494a775672f5d61ee12 [2021-12-16 06:04:41,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:04:41,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:04:41,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:04:41,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:04:41,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:04:41,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:41,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b5b90de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41, skipping insertion in model container [2021-12-16 06:04:41,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:41,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:04:41,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:04:41,841 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/list-simple/sll2c_insert_unequal.i[24872,24885] [2021-12-16 06:04:41,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:04:41,850 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:04:41,882 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/list-simple/sll2c_insert_unequal.i[24872,24885] [2021-12-16 06:04:41,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:04:41,904 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:04:41,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41 WrapperNode [2021-12-16 06:04:41,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:04:41,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:04:41,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:04:41,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:04:41,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:41,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:41,967 INFO L137 Inliner]: procedures = 127, calls = 48, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 178 [2021-12-16 06:04:41,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:04:41,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:04:41,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:04:41,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:04:41,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:41,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:41,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:41,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:41,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:41,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:41,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:41,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:04:41,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:04:41,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:04:41,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:04:41,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41" (1/1) ... [2021-12-16 06:04:42,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:04:42,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:42,032 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 06:04:42,034 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 06:04:42,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 06:04:42,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 06:04:42,063 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-16 06:04:42,064 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-16 06:04:42,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:04:42,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 06:04:42,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 06:04:42,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:04:42,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:04:42,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 06:04:42,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 06:04:42,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 06:04:42,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:04:42,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:04:42,141 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:04:42,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:04:42,506 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:04:42,514 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:04:42,516 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-16 06:04:42,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:04:42 BoogieIcfgContainer [2021-12-16 06:04:42,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:04:42,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:04:42,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:04:42,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:04:42,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:04:41" (1/3) ... [2021-12-16 06:04:42,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b41d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:04:42, skipping insertion in model container [2021-12-16 06:04:42,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:41" (2/3) ... [2021-12-16 06:04:42,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b41d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:04:42, skipping insertion in model container [2021-12-16 06:04:42,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:04:42" (3/3) ... [2021-12-16 06:04:42,524 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_insert_unequal.i [2021-12-16 06:04:42,527 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:04:42,527 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-12-16 06:04:42,567 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:04:42,573 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 06:04:42,574 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-12-16 06:04:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 74 states have (on average 2.081081081081081) internal successors, (154), 136 states have internal predecessors, (154), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 06:04:42,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:42,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 06:04:42,606 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:42,611 INFO L85 PathProgramCache]: Analyzing trace with hash 896568277, now seen corresponding path program 1 times [2021-12-16 06:04:42,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:42,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823650578] [2021-12-16 06:04:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:42,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:42,776 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 06:04:42,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:42,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823650578] [2021-12-16 06:04:42,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823650578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:42,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:42,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:04:42,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218639999] [2021-12-16 06:04:42,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:42,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:04:42,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:42,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:04:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:04:42,813 INFO L87 Difference]: Start difference. First operand has 141 states, 74 states have (on average 2.081081081081081) internal successors, (154), 136 states have internal predecessors, (154), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:42,949 INFO L93 Difference]: Finished difference Result 139 states and 152 transitions. [2021-12-16 06:04:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:04:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 06:04:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:42,964 INFO L225 Difference]: With dead ends: 139 [2021-12-16 06:04:42,965 INFO L226 Difference]: Without dead ends: 136 [2021-12-16 06:04:42,966 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 06:04:42,968 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 8 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:42,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 225 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:04:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-16 06:04:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-12-16 06:04:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 131 states have internal predecessors, (142), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2021-12-16 06:04:43,003 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 6 [2021-12-16 06:04:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:43,004 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2021-12-16 06:04:43,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2021-12-16 06:04:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 06:04:43,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:43,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 06:04:43,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 06:04:43,005 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash 896568278, now seen corresponding path program 1 times [2021-12-16 06:04:43,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:43,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893205661] [2021-12-16 06:04:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:43,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,041 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 06:04:43,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:43,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893205661] [2021-12-16 06:04:43,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893205661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:43,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:43,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:04:43,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261387595] [2021-12-16 06:04:43,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:43,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:04:43,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:43,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:04:43,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:04:43,055 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:43,114 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2021-12-16 06:04:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:04:43,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 06:04:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:43,115 INFO L225 Difference]: With dead ends: 134 [2021-12-16 06:04:43,115 INFO L226 Difference]: Without dead ends: 134 [2021-12-16 06:04:43,116 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 06:04:43,117 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 4 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:43,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 227 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:04:43,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-16 06:04:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-12-16 06:04:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 72 states have (on average 1.9444444444444444) internal successors, (140), 129 states have internal predecessors, (140), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2021-12-16 06:04:43,123 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 6 [2021-12-16 06:04:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:43,123 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2021-12-16 06:04:43,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2021-12-16 06:04:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:04:43,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:43,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:43,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 06:04:43,125 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash 24922967, now seen corresponding path program 1 times [2021-12-16 06:04:43,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:43,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171398272] [2021-12-16 06:04:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:43,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,182 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 06:04:43,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:43,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171398272] [2021-12-16 06:04:43,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171398272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:43,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:43,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:04:43,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730511555] [2021-12-16 06:04:43,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:43,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:04:43,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:43,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:04:43,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:04:43,184 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:04:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:43,269 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-12-16 06:04:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:04:43,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-16 06:04:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:43,271 INFO L225 Difference]: With dead ends: 141 [2021-12-16 06:04:43,271 INFO L226 Difference]: Without dead ends: 141 [2021-12-16 06:04:43,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:04:43,272 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 5 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:43,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 338 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:04:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-16 06:04:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2021-12-16 06:04:43,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 130 states have internal predecessors, (141), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2021-12-16 06:04:43,279 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 13 [2021-12-16 06:04:43,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:43,279 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2021-12-16 06:04:43,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:04:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2021-12-16 06:04:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 06:04:43,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:43,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:43,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 06:04:43,281 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:43,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:43,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1284022556, now seen corresponding path program 1 times [2021-12-16 06:04:43,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:43,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670865883] [2021-12-16 06:04:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:43,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:04:43,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670865883] [2021-12-16 06:04:43,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670865883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:43,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:43,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:04:43,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136735736] [2021-12-16 06:04:43,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:43,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:04:43,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:43,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:04:43,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:04:43,362 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:43,605 INFO L93 Difference]: Finished difference Result 135 states and 148 transitions. [2021-12-16 06:04:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:04:43,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-16 06:04:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:43,608 INFO L225 Difference]: With dead ends: 135 [2021-12-16 06:04:43,608 INFO L226 Difference]: Without dead ends: 135 [2021-12-16 06:04:43,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:04:43,609 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 13 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:43,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 488 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:04:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-16 06:04:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-12-16 06:04:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 73 states have (on average 1.917808219178082) internal successors, (140), 129 states have internal predecessors, (140), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2021-12-16 06:04:43,615 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 22 [2021-12-16 06:04:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:43,615 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2021-12-16 06:04:43,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2021-12-16 06:04:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 06:04:43,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:43,616 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:43,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 06:04:43,617 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:43,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1284022557, now seen corresponding path program 1 times [2021-12-16 06:04:43,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:43,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415645273] [2021-12-16 06:04:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:43,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:04:43,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:43,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415645273] [2021-12-16 06:04:43,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415645273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:43,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:43,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:04:43,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658360604] [2021-12-16 06:04:43,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:43,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:04:43,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:04:43,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:04:43,730 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:43,923 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2021-12-16 06:04:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:04:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-16 06:04:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:43,924 INFO L225 Difference]: With dead ends: 134 [2021-12-16 06:04:43,925 INFO L226 Difference]: Without dead ends: 134 [2021-12-16 06:04:43,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:04:43,926 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 11 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:43,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 512 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:04:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-16 06:04:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-16 06:04:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 73 states have (on average 1.904109589041096) internal successors, (139), 128 states have internal predecessors, (139), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2021-12-16 06:04:43,930 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 22 [2021-12-16 06:04:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:43,931 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2021-12-16 06:04:43,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2021-12-16 06:04:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 06:04:43,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:43,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:43,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 06:04:43,934 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:43,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1337216453, now seen corresponding path program 1 times [2021-12-16 06:04:43,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:43,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470755296] [2021-12-16 06:04:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:43,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:43,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 06:04:44,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:44,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470755296] [2021-12-16 06:04:44,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470755296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:44,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619843725] [2021-12-16 06:04:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:44,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:44,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:44,075 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 06:04:44,093 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 06:04:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 06:04:44,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:44,227 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 06:04:44,377 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 06:04:44,378 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 06:04:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:04:44,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:44,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619843725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:44,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:04:44,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-12-16 06:04:44,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673212832] [2021-12-16 06:04:44,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:44,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 06:04:44,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:44,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 06:04:44,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-16 06:04:44,496 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:04:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:44,655 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2021-12-16 06:04:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:04:44,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-16 06:04:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:44,656 INFO L225 Difference]: With dead ends: 150 [2021-12-16 06:04:44,656 INFO L226 Difference]: Without dead ends: 150 [2021-12-16 06:04:44,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-16 06:04:44,657 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 126 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:44,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 466 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 351 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2021-12-16 06:04:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-16 06:04:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 132. [2021-12-16 06:04:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 73 states have (on average 1.8904109589041096) internal successors, (138), 127 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 144 transitions. [2021-12-16 06:04:44,662 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 144 transitions. Word has length 25 [2021-12-16 06:04:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:44,662 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 144 transitions. [2021-12-16 06:04:44,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:04:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 144 transitions. [2021-12-16 06:04:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 06:04:44,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:44,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:44,709 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 06:04:44,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 06:04:44,884 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:44,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1337216454, now seen corresponding path program 1 times [2021-12-16 06:04:44,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:44,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209245456] [2021-12-16 06:04:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:44,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:44,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 06:04:45,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209245456] [2021-12-16 06:04:45,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209245456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918949499] [2021-12-16 06:04:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:45,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:45,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:45,037 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 06:04:45,039 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 06:04:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 06:04:45,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:45,144 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 06:04:45,147 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 06:04:45,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:04:45,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-16 06:04:45,374 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:04:45,374 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 06:04:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:04:45,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:45,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918949499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:45,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:04:45,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-16 06:04:45,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412586381] [2021-12-16 06:04:45,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:45,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 06:04:45,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 06:04:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-16 06:04:45,493 INFO L87 Difference]: Start difference. First operand 132 states and 144 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:04:45,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:45,901 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2021-12-16 06:04:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 06:04:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-12-16 06:04:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:45,903 INFO L225 Difference]: With dead ends: 132 [2021-12-16 06:04:45,903 INFO L226 Difference]: Without dead ends: 132 [2021-12-16 06:04:45,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-12-16 06:04:45,904 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 10 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:45,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 947 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 733 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2021-12-16 06:04:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-16 06:04:45,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-12-16 06:04:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.8767123287671232) internal successors, (137), 126 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:45,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2021-12-16 06:04:45,908 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 25 [2021-12-16 06:04:45,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:45,908 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2021-12-16 06:04:45,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:04:45,908 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2021-12-16 06:04:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 06:04:45,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:45,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:45,943 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 06:04:46,127 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,SelfDestructingSolverStorable6 [2021-12-16 06:04:46,127 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:46,128 INFO L85 PathProgramCache]: Analyzing trace with hash -148939745, now seen corresponding path program 1 times [2021-12-16 06:04:46,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:04:46,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900848913] [2021-12-16 06:04:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:46,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:04:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:46,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 06:04:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:46,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 06:04:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:46,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 06:04:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:04:46,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:04:46,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900848913] [2021-12-16 06:04:46,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900848913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:46,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219662376] [2021-12-16 06:04:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:46,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:46,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:46,353 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 06:04:46,354 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 06:04:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:46,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 06:04:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:46,480 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 06:04:46,491 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 06:04:46,562 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 06:04:46,562 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 18 [2021-12-16 06:04:46,635 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 06:04:46,822 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 57143 column 46: unknown constant v_old(#valid)_AFTER_CALL_6 [2021-12-16 06:04:46,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:04:46,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-16 06:04:46,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405847428] [2021-12-16 06:04:46,828 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:46,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 06:04:46,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:04:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 06:04:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-16 06:04:46,830 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:04:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 06:04:46,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-16 06:04:46,831 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 06:04:46,831 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 06:04:46,852 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 06:04:47,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:04:47,034 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.modelcheckerutils.smt.MonolithicImplicationChecker@a8db8d9 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 06:04:47,041 INFO L158 Benchmark]: Toolchain (without parser) took 5595.26ms. Allocated memory was 92.3MB in the beginning and 159.4MB in the end (delta: 67.1MB). Free memory was 59.8MB in the beginning and 98.6MB in the end (delta: -38.9MB). Peak memory consumption was 27.6MB. Max. memory is 16.1GB. [2021-12-16 06:04:47,042 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 92.3MB. Free memory is still 47.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:04:47,042 INFO L158 Benchmark]: CACSL2BoogieTranslator took 458.10ms. Allocated memory is still 92.3MB. Free memory was 59.6MB in the beginning and 60.1MB in the end (delta: -492.8kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 06:04:47,042 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.74ms. Allocated memory is still 92.3MB. Free memory was 60.1MB in the beginning and 57.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 06:04:47,042 INFO L158 Benchmark]: Boogie Preprocessor took 27.74ms. Allocated memory is still 92.3MB. Free memory was 57.6MB in the beginning and 55.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 06:04:47,043 INFO L158 Benchmark]: RCFGBuilder took 521.29ms. Allocated memory was 92.3MB in the beginning and 132.1MB in the end (delta: 39.8MB). Free memory was 55.7MB in the beginning and 100.1MB in the end (delta: -44.4MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. [2021-12-16 06:04:47,043 INFO L158 Benchmark]: TraceAbstraction took 4521.56ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 99.4MB in the beginning and 98.6MB in the end (delta: 812.7kB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB. [2021-12-16 06:04:47,045 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 92.3MB. Free memory is still 47.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 458.10ms. Allocated memory is still 92.3MB. Free memory was 59.6MB in the beginning and 60.1MB in the end (delta: -492.8kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.74ms. Allocated memory is still 92.3MB. Free memory was 60.1MB in the beginning and 57.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.74ms. Allocated memory is still 92.3MB. Free memory was 57.6MB in the beginning and 55.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 521.29ms. Allocated memory was 92.3MB in the beginning and 132.1MB in the end (delta: 39.8MB). Free memory was 55.7MB in the beginning and 100.1MB in the end (delta: -44.4MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4521.56ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 99.4MB in the beginning and 98.6MB in the end (delta: 812.7kB). Peak memory consumption was 28.6MB. 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.modelcheckerutils.smt.MonolithicImplicationChecker@a8db8d9 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@a8db8d9: 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 06:04:47,064 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 1 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/list-simple/sll2c_insert_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b7b415e0519ab150e9247d3d9d0133f92cfd07c34f9918f9ebd19cf8109bf4e7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:04:49,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:04:49,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:04:49,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:04:49,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:04:49,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:04:49,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:04:49,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:04:49,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:04:49,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:04:49,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:04:49,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:04:49,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:04:49,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:04:49,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:04:49,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:04:49,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:04:49,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:04:49,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:04:49,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:04:49,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:04:49,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:04:49,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:04:49,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:04:49,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:04:49,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:04:49,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:04:49,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:04:49,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:04:49,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:04:49,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:04:49,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:04:49,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:04:49,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:04:49,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:04:49,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:04:49,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:04:49,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:04:49,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:04:49,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:04:49,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:04:49,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 06:04:49,206 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:04:49,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:04:49,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:04:49,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:04:49,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:04:49,209 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:04:49,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:04:49,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:04:49,210 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:04:49,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:04:49,211 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:04:49,211 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:04:49,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:04:49,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:04:49,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:04:49,212 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:04:49,212 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:04:49,212 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:04:49,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:04:49,212 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:04:49,213 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 06:04:49,213 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 06:04:49,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:04:49,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:04:49,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:04:49,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:04:49,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:04:49,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:04:49,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:04:49,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:04:49,214 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 06:04:49,214 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 06:04:49,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:04:49,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 06:04:49,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7b415e0519ab150e9247d3d9d0133f92cfd07c34f9918f9ebd19cf8109bf4e7 [2021-12-16 06:04:49,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:04:49,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:04:49,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:04:49,523 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:04:49,524 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:04:49,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_insert_unequal.i [2021-12-16 06:04:49,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23b76d457/1e6734cf25744a82bf534b8fda7bc068/FLAG261655767 [2021-12-16 06:04:49,969 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:04:49,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_insert_unequal.i [2021-12-16 06:04:49,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23b76d457/1e6734cf25744a82bf534b8fda7bc068/FLAG261655767 [2021-12-16 06:04:50,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23b76d457/1e6734cf25744a82bf534b8fda7bc068 [2021-12-16 06:04:50,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:04:50,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:04:50,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:04:50,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:04:50,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:04:50,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d454596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50, skipping insertion in model container [2021-12-16 06:04:50,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:04:50,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:04:50,706 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/list-simple/sll2c_insert_unequal.i[24872,24885] [2021-12-16 06:04:50,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:04:50,729 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:04:50,783 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/list-simple/sll2c_insert_unequal.i[24872,24885] [2021-12-16 06:04:50,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:04:50,814 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:04:50,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50 WrapperNode [2021-12-16 06:04:50,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:04:50,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:04:50,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:04:50,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:04:50,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,877 INFO L137 Inliner]: procedures = 130, calls = 48, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 179 [2021-12-16 06:04:50,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:04:50,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:04:50,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:04:50,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:04:50,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:04:50,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:04:50,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:04:50,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:04:50,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50" (1/1) ... [2021-12-16 06:04:50,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:04:50,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:04:50,942 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 06:04:50,948 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 06:04:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 06:04:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-16 06:04:50,979 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-16 06:04:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:04:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 06:04:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 06:04:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:04:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:04:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 06:04:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 06:04:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 06:04:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 06:04:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:04:50,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:04:51,135 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:04:51,136 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:04:51,598 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:04:51,604 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:04:51,604 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-16 06:04:51,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:04:51 BoogieIcfgContainer [2021-12-16 06:04:51,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:04:51,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:04:51,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:04:51,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:04:51,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:04:50" (1/3) ... [2021-12-16 06:04:51,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@771314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:04:51, skipping insertion in model container [2021-12-16 06:04:51,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:04:50" (2/3) ... [2021-12-16 06:04:51,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@771314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:04:51, skipping insertion in model container [2021-12-16 06:04:51,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:04:51" (3/3) ... [2021-12-16 06:04:51,612 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_insert_unequal.i [2021-12-16 06:04:51,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:04:51,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-12-16 06:04:51,644 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:04:51,653 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 06:04:51,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-12-16 06:04:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 74 states have (on average 2.081081081081081) internal successors, (154), 136 states have internal predecessors, (154), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 06:04:51,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:51,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 06:04:51,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:51,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:51,674 INFO L85 PathProgramCache]: Analyzing trace with hash 896568277, now seen corresponding path program 1 times [2021-12-16 06:04:51,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:04:51,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411012222] [2021-12-16 06:04:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:51,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:04:51,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:04:51,686 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 06:04:51,687 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 06:04:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:51,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 06:04:51,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:51,977 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 06:04:51,992 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 06:04:51,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:04:51,994 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:04:51,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411012222] [2021-12-16 06:04:51,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411012222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:51,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:51,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:04:51,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146161226] [2021-12-16 06:04:51,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:52,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:04:52,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:04:52,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:04:52,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:04:52,034 INFO L87 Difference]: Start difference. First operand has 141 states, 74 states have (on average 2.081081081081081) internal successors, (154), 136 states have internal predecessors, (154), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:52,213 INFO L93 Difference]: Finished difference Result 139 states and 152 transitions. [2021-12-16 06:04:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:04:52,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 06:04:52,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:52,222 INFO L225 Difference]: With dead ends: 139 [2021-12-16 06:04:52,223 INFO L226 Difference]: Without dead ends: 136 [2021-12-16 06:04:52,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 06:04:52,226 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 8 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:52,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 225 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:04:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-16 06:04:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-12-16 06:04:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 131 states have internal predecessors, (142), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2021-12-16 06:04:52,327 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 6 [2021-12-16 06:04:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:52,327 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2021-12-16 06:04:52,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:52,328 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2021-12-16 06:04:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 06:04:52,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:52,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 06:04:52,341 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 06:04:52,541 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 06:04:52,541 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:52,544 INFO L85 PathProgramCache]: Analyzing trace with hash 896568278, now seen corresponding path program 1 times [2021-12-16 06:04:52,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:04:52,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842607928] [2021-12-16 06:04:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:52,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:04:52,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:04:52,548 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 06:04:52,550 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 06:04:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:52,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 06:04:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:52,611 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 06:04:52,625 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 06:04:52,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:04:52,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:04:52,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842607928] [2021-12-16 06:04:52,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842607928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:52,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:52,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:04:52,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22197467] [2021-12-16 06:04:52,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:52,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:04:52,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:04:52,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:04:52,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:04:52,629 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:52,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:52,789 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2021-12-16 06:04:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:04:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 06:04:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:52,792 INFO L225 Difference]: With dead ends: 134 [2021-12-16 06:04:52,792 INFO L226 Difference]: Without dead ends: 134 [2021-12-16 06:04:52,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 06:04:52,793 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 4 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:52,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 227 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:04:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-16 06:04:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-12-16 06:04:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 72 states have (on average 1.9444444444444444) internal successors, (140), 129 states have internal predecessors, (140), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2021-12-16 06:04:52,798 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 6 [2021-12-16 06:04:52,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:52,798 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2021-12-16 06:04:52,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:04:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2021-12-16 06:04:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:04:52,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:52,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:52,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-16 06:04:53,016 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 06:04:53,017 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash 24922967, now seen corresponding path program 1 times [2021-12-16 06:04:53,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:04:53,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924162870] [2021-12-16 06:04:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:53,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:04:53,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:04:53,020 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 06:04:53,025 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 06:04:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 06:04:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:53,151 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 06:04:53,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:04:53,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:04:53,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924162870] [2021-12-16 06:04:53,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924162870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:53,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:53,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:04:53,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528703409] [2021-12-16 06:04:53,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:53,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:04:53,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:04:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:04:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:04:53,154 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:04:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:53,163 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-12-16 06:04:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:04:53,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-16 06:04:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:53,165 INFO L225 Difference]: With dead ends: 141 [2021-12-16 06:04:53,165 INFO L226 Difference]: Without dead ends: 141 [2021-12-16 06:04:53,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 06:04:53,166 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 5 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:53,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 285 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:04:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-16 06:04:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2021-12-16 06:04:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 130 states have internal predecessors, (141), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2021-12-16 06:04:53,173 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 13 [2021-12-16 06:04:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:53,174 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2021-12-16 06:04:53,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:04:53,174 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2021-12-16 06:04:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 06:04:53,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:53,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:53,186 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 06:04:53,381 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 06:04:53,382 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:53,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1284022556, now seen corresponding path program 1 times [2021-12-16 06:04:53,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:04:53,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030079764] [2021-12-16 06:04:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:53,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:04:53,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:04:53,385 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 06:04:53,387 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 06:04:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:53,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 06:04:53,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:53,504 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 06:04:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:04:53,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:04:53,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:04:53,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030079764] [2021-12-16 06:04:53,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030079764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:53,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:53,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:04:53,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897721570] [2021-12-16 06:04:53,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:53,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:04:53,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:04:53,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:04:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:04:53,558 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:54,000 INFO L93 Difference]: Finished difference Result 135 states and 148 transitions. [2021-12-16 06:04:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:04:54,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-16 06:04:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:54,003 INFO L225 Difference]: With dead ends: 135 [2021-12-16 06:04:54,003 INFO L226 Difference]: Without dead ends: 135 [2021-12-16 06:04:54,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:04:54,004 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 12 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:54,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 439 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 06:04:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-16 06:04:54,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-12-16 06:04:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 73 states have (on average 1.917808219178082) internal successors, (140), 129 states have internal predecessors, (140), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2021-12-16 06:04:54,010 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 22 [2021-12-16 06:04:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:54,011 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2021-12-16 06:04:54,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2021-12-16 06:04:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 06:04:54,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:54,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:54,021 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 06:04:54,219 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 06:04:54,219 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1284022557, now seen corresponding path program 1 times [2021-12-16 06:04:54,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:04:54,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61382395] [2021-12-16 06:04:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:54,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:04:54,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:04:54,223 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 06:04:54,225 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 06:04:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:54,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 06:04:54,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:54,339 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 06:04:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:04:54,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:04:54,410 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:04:54,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61382395] [2021-12-16 06:04:54,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61382395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:04:54,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:04:54,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:04:54,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263504717] [2021-12-16 06:04:54,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:04:54,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:04:54,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:04:54,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:04:54,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:04:54,412 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:54,783 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2021-12-16 06:04:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:04:54,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-16 06:04:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:54,785 INFO L225 Difference]: With dead ends: 134 [2021-12-16 06:04:54,786 INFO L226 Difference]: Without dead ends: 134 [2021-12-16 06:04:54,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:04:54,786 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 11 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:54,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 463 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 06:04:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-16 06:04:54,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-16 06:04:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 73 states have (on average 1.904109589041096) internal successors, (139), 128 states have internal predecessors, (139), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2021-12-16 06:04:54,792 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 22 [2021-12-16 06:04:54,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:54,792 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2021-12-16 06:04:54,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:04:54,792 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2021-12-16 06:04:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 06:04:54,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:54,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:54,803 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 06:04:55,001 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 06:04:55,001 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:55,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:55,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1337216453, now seen corresponding path program 1 times [2021-12-16 06:04:55,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:04:55,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40398225] [2021-12-16 06:04:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:55,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:04:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:04:55,005 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 06:04:55,006 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 06:04:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:55,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 06:04:55,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:55,142 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 06:04:55,324 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 06:04:55,324 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 20 treesize of output 27 [2021-12-16 06:04:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:04:55,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:04:55,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:04:55,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40398225] [2021-12-16 06:04:55,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40398225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:04:55,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:04:55,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-16 06:04:55,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743583791] [2021-12-16 06:04:55,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:55,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 06:04:55,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:04:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 06:04:55,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 06:04:55,585 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:04:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:55,910 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-12-16 06:04:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:04:55,911 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-16 06:04:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:55,912 INFO L225 Difference]: With dead ends: 132 [2021-12-16 06:04:55,912 INFO L226 Difference]: Without dead ends: 132 [2021-12-16 06:04:55,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-16 06:04:55,913 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 4 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:55,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 645 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2021-12-16 06:04:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-16 06:04:55,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-12-16 06:04:55,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 73 states have (on average 1.8904109589041096) internal successors, (138), 127 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:04:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 144 transitions. [2021-12-16 06:04:55,919 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 144 transitions. Word has length 25 [2021-12-16 06:04:55,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:55,919 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 144 transitions. [2021-12-16 06:04:55,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:04:55,919 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 144 transitions. [2021-12-16 06:04:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 06:04:55,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:55,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:55,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 06:04:56,121 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 06:04:56,121 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:04:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:04:56,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1337216454, now seen corresponding path program 1 times [2021-12-16 06:04:56,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:04:56,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137934365] [2021-12-16 06:04:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:56,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:04:56,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:04:56,123 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 06:04:56,124 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 06:04:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 06:04:56,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:56,256 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 06:04:56,264 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 06:04:56,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:04:56,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-16 06:04:56,505 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:04:56,505 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 06:04:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:04:56,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:56,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:04:56,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137934365] [2021-12-16 06:04:56,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137934365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:56,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2135321090] [2021-12-16 06:04:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:04:56,769 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:04:56,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:04:56,778 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:04:56,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-12-16 06:04:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:04:56,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 06:04:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:04:56,942 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 06:04:56,947 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 06:04:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:04:59,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-16 06:04:59,128 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:04:59,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-16 06:04:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:04:59,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:04:59,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2135321090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:04:59,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:04:59,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-16 06:04:59,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755020022] [2021-12-16 06:04:59,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:04:59,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 06:04:59,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:04:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 06:04:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-16 06:04:59,354 INFO L87 Difference]: Start difference. First operand 132 states and 144 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:04:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:04:59,954 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2021-12-16 06:04:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 06:04:59,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-12-16 06:04:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:04:59,956 INFO L225 Difference]: With dead ends: 142 [2021-12-16 06:04:59,956 INFO L226 Difference]: Without dead ends: 142 [2021-12-16 06:04:59,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-16 06:04:59,957 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 7 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 06:04:59,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 505 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 392 Invalid, 0 Unknown, 79 Unchecked, 0.5s Time] [2021-12-16 06:04:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-16 06:04:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2021-12-16 06:04:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 78 states have (on average 1.8461538461538463) internal successors, (144), 132 states have internal predecessors, (144), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 06:04:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2021-12-16 06:04:59,961 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 25 [2021-12-16 06:04:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:04:59,962 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2021-12-16 06:04:59,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:04:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2021-12-16 06:04:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 06:04:59,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:04:59,963 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:04:59,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-12-16 06:05:00,175 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 06:05:00,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:00,373 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:00,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:00,374 INFO L85 PathProgramCache]: Analyzing trace with hash -148939745, now seen corresponding path program 1 times [2021-12-16 06:05:00,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:00,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187467693] [2021-12-16 06:05:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:00,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:00,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:00,376 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 06:05:00,377 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 06:05:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 06:05:00,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:00,581 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 06:05:00,596 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 8 treesize of output 6 [2021-12-16 06:05:00,720 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 06:05:00,720 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 20 treesize of output 27 [2021-12-16 06:05:00,747 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 8 treesize of output 6 [2021-12-16 06:05:00,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:00,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 17 [2021-12-16 06:05:01,055 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 06:05:01,055 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 06:05:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:05:01,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:01,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:01,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187467693] [2021-12-16 06:05:01,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187467693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:01,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1754151347] [2021-12-16 06:05:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:01,337 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:05:01,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:05:01,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:05:01,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-12-16 06:05:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:01,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 06:05:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:01,626 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 06:05:01,626 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 14 treesize of output 19 [2021-12-16 06:05:01,667 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 06:05:01,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2021-12-16 06:05:01,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:01,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:01,783 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-16 06:05:01,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 35 [2021-12-16 06:05:01,889 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 06:05:01,889 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 27 treesize of output 23 [2021-12-16 06:05:02,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:02,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:02,028 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-16 06:05:02,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 45 [2021-12-16 06:05:02,246 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 06:05:02,246 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 27 treesize of output 23 [2021-12-16 06:05:02,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:02,379 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-16 06:05:02,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 45 [2021-12-16 06:05:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 06:05:02,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:02,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1754151347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:02,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:05:02,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-12-16 06:05:02,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884200758] [2021-12-16 06:05:02,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:02,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 06:05:02,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:02,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 06:05:02,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-12-16 06:05:02,493 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:03,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:03,087 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2021-12-16 06:05:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 06:05:03,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-12-16 06:05:03,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:03,088 INFO L225 Difference]: With dead ends: 140 [2021-12-16 06:05:03,088 INFO L226 Difference]: Without dead ends: 140 [2021-12-16 06:05:03,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-16 06:05:03,089 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 3 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:03,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 687 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 384 Invalid, 0 Unknown, 133 Unchecked, 0.5s Time] [2021-12-16 06:05:03,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-16 06:05:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2021-12-16 06:05:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 78 states have (on average 1.8333333333333333) internal successors, (143), 131 states have internal predecessors, (143), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 06:05:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-12-16 06:05:03,092 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 37 [2021-12-16 06:05:03,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:03,092 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-12-16 06:05:03,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-12-16 06:05:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 06:05:03,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:03,093 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:03,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:03,306 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 06:05:03,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:03,497 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:03,498 INFO L85 PathProgramCache]: Analyzing trace with hash -148939744, now seen corresponding path program 1 times [2021-12-16 06:05:03,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:03,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123995098] [2021-12-16 06:05:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:03,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:03,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:03,500 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 06:05:03,501 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 06:05:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:03,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 06:05:03,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:03,741 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 06:05:03,747 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 06:05:03,787 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 8 treesize of output 6 [2021-12-16 06:05:03,792 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 06:05:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:05,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-16 06:05:05,942 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:05:05,943 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 06:05:05,994 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 06:05:08,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:08,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-16 06:05:08,470 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 06:05:08,471 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 18 [2021-12-16 06:05:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:08,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:08,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123995098] [2021-12-16 06:05:08,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123995098] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676367062] [2021-12-16 06:05:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:08,867 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:05:08,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:05:08,868 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:05:08,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-12-16 06:05:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:09,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 06:05:09,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:09,149 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 06:05:09,174 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 06:05:09,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:09,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-16 06:05:09,353 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 06:05:11,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:11,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-16 06:05:11,686 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 06:05:11,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:11,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-16 06:05:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 06:05:11,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:11,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1676367062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:11,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:05:11,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 15 [2021-12-16 06:05:11,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86945010] [2021-12-16 06:05:11,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:11,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 06:05:11,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:11,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 06:05:11,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=253, Unknown=3, NotChecked=0, Total=306 [2021-12-16 06:05:11,843 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 9 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:12,748 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2021-12-16 06:05:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 06:05:12,750 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-12-16 06:05:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:12,750 INFO L225 Difference]: With dead ends: 137 [2021-12-16 06:05:12,750 INFO L226 Difference]: Without dead ends: 137 [2021-12-16 06:05:12,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=59, Invalid=280, Unknown=3, NotChecked=0, Total=342 [2021-12-16 06:05:12,753 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 10 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:12,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 639 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 300 Invalid, 0 Unknown, 121 Unchecked, 0.9s Time] [2021-12-16 06:05:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-16 06:05:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-12-16 06:05:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 78 states have (on average 1.8205128205128205) internal successors, (142), 130 states have internal predecessors, (142), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 06:05:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2021-12-16 06:05:12,756 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 37 [2021-12-16 06:05:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:12,756 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2021-12-16 06:05:12,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2021-12-16 06:05:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 06:05:12,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:12,763 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:12,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:12,974 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 06:05:13,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:13,175 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:13,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:13,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1941562572, now seen corresponding path program 2 times [2021-12-16 06:05:13,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:13,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947310233] [2021-12-16 06:05:13,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:05:13,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:13,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:13,177 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 06:05:13,178 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 06:05:13,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 06:05:13,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:05:13,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:05:13,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 06:05:13,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 06:05:13,495 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:13,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947310233] [2021-12-16 06:05:13,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947310233] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:05:13,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:05:13,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-16 06:05:13,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600940781] [2021-12-16 06:05:13,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:13,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:05:13,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:13,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:05:13,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:13,496 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 06:05:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:13,523 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2021-12-16 06:05:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:05:13,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2021-12-16 06:05:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:13,525 INFO L225 Difference]: With dead ends: 129 [2021-12-16 06:05:13,525 INFO L226 Difference]: Without dead ends: 129 [2021-12-16 06:05:13,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:13,525 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 242 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:13,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 290 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:13,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-16 06:05:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-12-16 06:05:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 124 states have internal predecessors, (134), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2021-12-16 06:05:13,528 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 37 [2021-12-16 06:05:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:13,528 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2021-12-16 06:05:13,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 06:05:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2021-12-16 06:05:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 06:05:13,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:13,529 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:13,544 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 06:05:13,739 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 06:05:13,740 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash -362722266, now seen corresponding path program 1 times [2021-12-16 06:05:13,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:13,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441293739] [2021-12-16 06:05:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:13,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:13,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:13,750 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 06:05:13,752 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 06:05:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:13,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 06:05:13,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:14,004 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 06:05:14,159 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 6 treesize of output 5 [2021-12-16 06:05:14,224 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 12 treesize of output 8 [2021-12-16 06:05:14,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:14,512 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 19 treesize of output 21 [2021-12-16 06:05:14,558 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 06:05:14,558 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 24 treesize of output 35 [2021-12-16 06:05:14,740 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 29 treesize of output 17 [2021-12-16 06:05:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:05:14,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:15,042 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:15,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441293739] [2021-12-16 06:05:15,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441293739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:15,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2086303977] [2021-12-16 06:05:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:15,043 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:05:15,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:05:15,044 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:05:15,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-16 06:05:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 06:05:15,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:15,367 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 06:05:15,752 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 12 treesize of output 8 [2021-12-16 06:05:15,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:15,997 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 19 treesize of output 21 [2021-12-16 06:05:16,019 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 06:05:16,019 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 24 treesize of output 35 [2021-12-16 06:05:16,165 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 29 treesize of output 17 [2021-12-16 06:05:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:05:16,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:16,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2086303977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:16,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:05:16,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-12-16 06:05:16,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797371030] [2021-12-16 06:05:16,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:16,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 06:05:16,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:16,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 06:05:16,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=602, Unknown=5, NotChecked=0, Total=702 [2021-12-16 06:05:16,355 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:05:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:17,918 INFO L93 Difference]: Finished difference Result 230 states and 251 transitions. [2021-12-16 06:05:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 06:05:17,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-12-16 06:05:17,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:17,921 INFO L225 Difference]: With dead ends: 230 [2021-12-16 06:05:17,921 INFO L226 Difference]: Without dead ends: 230 [2021-12-16 06:05:17,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=155, Invalid=958, Unknown=9, NotChecked=0, Total=1122 [2021-12-16 06:05:17,922 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 128 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:17,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 897 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 684 Invalid, 0 Unknown, 368 Unchecked, 1.3s Time] [2021-12-16 06:05:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-16 06:05:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 131. [2021-12-16 06:05:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 75 states have (on average 1.84) internal successors, (138), 126 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2021-12-16 06:05:17,925 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 40 [2021-12-16 06:05:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:17,925 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2021-12-16 06:05:17,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:05:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2021-12-16 06:05:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 06:05:17,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:17,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:17,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-12-16 06:05:18,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-16 06:05:18,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:18,327 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:18,327 INFO L85 PathProgramCache]: Analyzing trace with hash -362722265, now seen corresponding path program 1 times [2021-12-16 06:05:18,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:18,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749234128] [2021-12-16 06:05:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:18,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:18,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:18,329 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 06:05:18,330 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 06:05:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:18,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 06:05:18,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:18,598 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 06:05:18,608 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 06:05:18,868 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 6 treesize of output 5 [2021-12-16 06:05:18,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:05:18,997 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 22 treesize of output 14 [2021-12-16 06:05:19,004 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 7 treesize of output 3 [2021-12-16 06:05:19,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:19,372 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 28 treesize of output 28 [2021-12-16 06:05:19,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:19,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2021-12-16 06:05:19,399 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 06:05:19,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-16 06:05:19,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:19,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 06:05:19,516 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 06:05:19,522 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 06:05:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:05:19,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:20,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:20,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749234128] [2021-12-16 06:05:20,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749234128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:20,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [68305286] [2021-12-16 06:05:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:20,272 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:05:20,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:05:20,273 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:05:20,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-16 06:05:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:20,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 06:05:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:20,752 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 06:05:20,761 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 06:05:21,368 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 22 treesize of output 14 [2021-12-16 06:05:21,372 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 7 treesize of output 3 [2021-12-16 06:05:21,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:21,738 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 06:05:21,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:21,752 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 28 treesize of output 28 [2021-12-16 06:05:21,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:21,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 06:05:21,785 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 06:05:21,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-16 06:05:21,925 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 06:05:21,943 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 06:05:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:05:21,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:22,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [68305286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:22,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:05:22,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-12-16 06:05:22,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696024182] [2021-12-16 06:05:22,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:22,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 06:05:22,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 06:05:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=756, Unknown=9, NotChecked=0, Total=870 [2021-12-16 06:05:22,579 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:05:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:23,984 INFO L93 Difference]: Finished difference Result 232 states and 252 transitions. [2021-12-16 06:05:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 06:05:23,985 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-12-16 06:05:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:23,986 INFO L225 Difference]: With dead ends: 232 [2021-12-16 06:05:23,986 INFO L226 Difference]: Without dead ends: 232 [2021-12-16 06:05:23,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=166, Invalid=1153, Unknown=13, NotChecked=0, Total=1332 [2021-12-16 06:05:23,987 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 137 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:23,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 576 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 418 Invalid, 0 Unknown, 89 Unchecked, 0.8s Time] [2021-12-16 06:05:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-16 06:05:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 131. [2021-12-16 06:05:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 126 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2021-12-16 06:05:23,991 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 40 [2021-12-16 06:05:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:23,992 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2021-12-16 06:05:23,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:05:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2021-12-16 06:05:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 06:05:23,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:23,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:24,005 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 06:05:24,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:24,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-16 06:05:24,403 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1640510023, now seen corresponding path program 1 times [2021-12-16 06:05:24,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:24,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118196401] [2021-12-16 06:05:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:24,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:24,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:24,405 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:24,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-16 06:05:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:24,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:05:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 06:05:24,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:24,635 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:24,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118196401] [2021-12-16 06:05:24,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118196401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:24,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:24,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:05:24,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861883560] [2021-12-16 06:05:24,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:24,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:05:24,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:24,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:05:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:05:24,636 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:24,673 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-12-16 06:05:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:05:24,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-12-16 06:05:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:24,674 INFO L225 Difference]: With dead ends: 132 [2021-12-16 06:05:24,674 INFO L226 Difference]: Without dead ends: 132 [2021-12-16 06:05:24,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 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 06:05:24,675 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 122 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:24,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 275 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:24,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-16 06:05:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-12-16 06:05:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 75 states have (on average 1.8133333333333332) internal successors, (136), 126 states have internal predecessors, (136), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2021-12-16 06:05:24,678 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 41 [2021-12-16 06:05:24,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:24,679 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2021-12-16 06:05:24,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2021-12-16 06:05:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 06:05:24,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:24,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:24,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-16 06:05:24,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:24,894 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:24,894 INFO L85 PathProgramCache]: Analyzing trace with hash 278707084, now seen corresponding path program 1 times [2021-12-16 06:05:24,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:24,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122728771] [2021-12-16 06:05:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:24,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:24,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:24,896 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:24,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-16 06:05:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 06:05:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 06:05:25,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 06:05:25,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:25,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122728771] [2021-12-16 06:05:25,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122728771] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:05:25,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:05:25,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 06:05:25,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347282907] [2021-12-16 06:05:25,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:25,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 06:05:25,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:25,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 06:05:25,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:05:25,654 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:05:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:25,709 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2021-12-16 06:05:25,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:05:25,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2021-12-16 06:05:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:25,710 INFO L225 Difference]: With dead ends: 128 [2021-12-16 06:05:25,710 INFO L226 Difference]: Without dead ends: 128 [2021-12-16 06:05:25,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 06:05:25,710 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 339 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:25,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 340 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-16 06:05:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-16 06:05:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 74 states have (on average 1.7837837837837838) internal successors, (132), 123 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2021-12-16 06:05:25,713 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 43 [2021-12-16 06:05:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:25,713 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2021-12-16 06:05:25,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:05:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2021-12-16 06:05:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 06:05:25,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:25,714 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:25,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:25,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:25,922 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:25,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:25,923 INFO L85 PathProgramCache]: Analyzing trace with hash 49983393, now seen corresponding path program 1 times [2021-12-16 06:05:25,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:25,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97009695] [2021-12-16 06:05:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:25,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:25,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:25,924 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:25,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-16 06:05:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:26,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 06:05:26,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 06:05:26,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:26,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:26,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97009695] [2021-12-16 06:05:26,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97009695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:26,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:26,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:05:26,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075713630] [2021-12-16 06:05:26,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:26,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:05:26,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:26,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:05:26,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:05:26,192 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:05:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:26,456 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-12-16 06:05:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:05:26,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-12-16 06:05:26,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:26,457 INFO L225 Difference]: With dead ends: 145 [2021-12-16 06:05:26,457 INFO L226 Difference]: Without dead ends: 145 [2021-12-16 06:05:26,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 06:05:26,458 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 103 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:26,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 197 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 06:05:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-16 06:05:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 127. [2021-12-16 06:05:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 74 states have (on average 1.7702702702702702) internal successors, (131), 122 states have internal predecessors, (131), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:26,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2021-12-16 06:05:26,460 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 44 [2021-12-16 06:05:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:26,460 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2021-12-16 06:05:26,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:05:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2021-12-16 06:05:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 06:05:26,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:26,461 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:26,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:26,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:26,668 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:26,668 INFO L85 PathProgramCache]: Analyzing trace with hash 49983394, now seen corresponding path program 1 times [2021-12-16 06:05:26,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:26,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458698728] [2021-12-16 06:05:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:26,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:26,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:26,696 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:26,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-16 06:05:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:26,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:05:26,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 06:05:26,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:26,978 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:26,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458698728] [2021-12-16 06:05:26,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458698728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:26,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:26,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:05:26,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483151267] [2021-12-16 06:05:26,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:26,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:05:26,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:26,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:05:26,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:05:26,979 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:05:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:27,282 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-12-16 06:05:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:05:27,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-12-16 06:05:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:27,283 INFO L225 Difference]: With dead ends: 126 [2021-12-16 06:05:27,283 INFO L226 Difference]: Without dead ends: 126 [2021-12-16 06:05:27,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 06:05:27,284 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 106 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:27,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 195 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 06:05:27,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-16 06:05:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-12-16 06:05:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 74 states have (on average 1.7567567567567568) internal successors, (130), 121 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2021-12-16 06:05:27,287 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 44 [2021-12-16 06:05:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:27,287 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2021-12-16 06:05:27,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:05:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2021-12-16 06:05:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 06:05:27,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:27,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:27,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:27,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:27,494 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:27,494 INFO L85 PathProgramCache]: Analyzing trace with hash 49983650, now seen corresponding path program 1 times [2021-12-16 06:05:27,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:27,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334940642] [2021-12-16 06:05:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:27,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:27,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:27,496 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:27,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-16 06:05:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:27,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:05:27,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 06:05:27,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:27,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:27,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334940642] [2021-12-16 06:05:27,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334940642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:27,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:27,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:05:27,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554069123] [2021-12-16 06:05:27,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:27,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 06:05:27,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:27,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 06:05:27,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:05:27,798 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:27,974 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2021-12-16 06:05:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:05:27,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2021-12-16 06:05:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:27,976 INFO L225 Difference]: With dead ends: 122 [2021-12-16 06:05:27,976 INFO L226 Difference]: Without dead ends: 122 [2021-12-16 06:05:27,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:05:27,976 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 317 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:27,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 121 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:05:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-16 06:05:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-12-16 06:05:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 117 states have internal predecessors, (126), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2021-12-16 06:05:27,979 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 44 [2021-12-16 06:05:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:27,980 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2021-12-16 06:05:27,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2021-12-16 06:05:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 06:05:27,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:27,980 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:28,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-16 06:05:28,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:28,189 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:28,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:28,189 INFO L85 PathProgramCache]: Analyzing trace with hash 49983649, now seen corresponding path program 1 times [2021-12-16 06:05:28,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:28,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454339930] [2021-12-16 06:05:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:28,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:28,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:28,191 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:28,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-16 06:05:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:28,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 06:05:28,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 06:05:28,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:28,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:28,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454339930] [2021-12-16 06:05:28,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454339930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:28,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:28,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:05:28,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842068035] [2021-12-16 06:05:28,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:28,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:05:28,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:28,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:05:28,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:28,395 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:05:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:28,543 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2021-12-16 06:05:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:05:28,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-12-16 06:05:28,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:28,545 INFO L225 Difference]: With dead ends: 136 [2021-12-16 06:05:28,545 INFO L226 Difference]: Without dead ends: 136 [2021-12-16 06:05:28,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 06:05:28,545 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:28,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 113 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-16 06:05:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2021-12-16 06:05:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 113 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2021-12-16 06:05:28,548 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 44 [2021-12-16 06:05:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:28,548 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2021-12-16 06:05:28,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:05:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2021-12-16 06:05:28,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 06:05:28,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:28,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:28,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:28,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:28,761 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:28,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1549485210, now seen corresponding path program 1 times [2021-12-16 06:05:28,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:28,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862742846] [2021-12-16 06:05:28,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:28,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:28,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:28,763 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:28,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-16 06:05:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:29,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 06:05:29,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:29,047 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 06:05:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 06:05:29,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:29,114 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:29,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862742846] [2021-12-16 06:05:29,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862742846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:29,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:29,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:05:29,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848182766] [2021-12-16 06:05:29,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:29,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:05:29,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:29,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:05:29,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:29,115 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:05:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:29,569 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2021-12-16 06:05:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:05:29,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-16 06:05:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:29,570 INFO L225 Difference]: With dead ends: 133 [2021-12-16 06:05:29,570 INFO L226 Difference]: Without dead ends: 133 [2021-12-16 06:05:29,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:05:29,571 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 91 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:29,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 296 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 06:05:29,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-16 06:05:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2021-12-16 06:05:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 74 states have (on average 1.6081081081081081) internal successors, (119), 110 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:29,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-12-16 06:05:29,574 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 45 [2021-12-16 06:05:29,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:29,574 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-12-16 06:05:29,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:05:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-12-16 06:05:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 06:05:29,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:29,575 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:29,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:29,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:29,776 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:29,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1549485211, now seen corresponding path program 1 times [2021-12-16 06:05:29,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:29,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977995342] [2021-12-16 06:05:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:29,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:29,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:29,778 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:29,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-16 06:05:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:29,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 06:05:29,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:29,998 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 06:05:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 06:05:30,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:30,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:30,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977995342] [2021-12-16 06:05:30,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977995342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:30,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:30,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:05:30,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288783085] [2021-12-16 06:05:30,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:30,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:05:30,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:30,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:05:30,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:30,105 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:05:30,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:30,517 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2021-12-16 06:05:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:05:30,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-16 06:05:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:30,519 INFO L225 Difference]: With dead ends: 112 [2021-12-16 06:05:30,519 INFO L226 Difference]: Without dead ends: 112 [2021-12-16 06:05:30,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:05:30,520 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 92 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:30,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 307 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 06:05:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-16 06:05:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-12-16 06:05:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 107 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2021-12-16 06:05:30,526 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 45 [2021-12-16 06:05:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:30,527 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2021-12-16 06:05:30,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 06:05:30,527 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2021-12-16 06:05:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 06:05:30,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:30,528 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:30,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:30,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:30,735 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1298362917, now seen corresponding path program 1 times [2021-12-16 06:05:30,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:30,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350305807] [2021-12-16 06:05:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:30,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:30,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:30,737 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:30,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-16 06:05:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:30,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 06:05:30,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 06:05:31,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:31,006 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350305807] [2021-12-16 06:05:31,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350305807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:31,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:31,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:05:31,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101324554] [2021-12-16 06:05:31,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:31,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:05:31,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:31,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:05:31,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:05:31,007 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:31,210 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2021-12-16 06:05:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:05:31,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-12-16 06:05:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:31,211 INFO L225 Difference]: With dead ends: 126 [2021-12-16 06:05:31,211 INFO L226 Difference]: Without dead ends: 126 [2021-12-16 06:05:31,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 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 06:05:31,212 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 188 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:31,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 122 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:05:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-16 06:05:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2021-12-16 06:05:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 74 states have (on average 1.5135135135135136) internal successors, (112), 103 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-12-16 06:05:31,214 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 47 [2021-12-16 06:05:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:31,214 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-12-16 06:05:31,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-12-16 06:05:31,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 06:05:31,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:31,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:31,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:31,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:31,424 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1298362916, now seen corresponding path program 1 times [2021-12-16 06:05:31,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:31,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831996036] [2021-12-16 06:05:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:31,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:31,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:31,426 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:31,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-16 06:05:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:31,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 06:05:31,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 06:05:31,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:31,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:31,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831996036] [2021-12-16 06:05:31,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831996036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:31,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:31,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:05:31,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20387589] [2021-12-16 06:05:31,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:31,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 06:05:31,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:31,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 06:05:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:05:31,801 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:31,980 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2021-12-16 06:05:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:05:31,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-12-16 06:05:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:31,982 INFO L225 Difference]: With dead ends: 104 [2021-12-16 06:05:31,982 INFO L226 Difference]: Without dead ends: 104 [2021-12-16 06:05:31,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:31,982 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 178 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:31,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 112 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:05:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-16 06:05:31,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-12-16 06:05:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 99 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2021-12-16 06:05:31,984 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 47 [2021-12-16 06:05:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:31,985 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2021-12-16 06:05:31,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:31,985 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2021-12-16 06:05:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 06:05:31,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:31,985 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:05:31,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:32,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:32,191 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-16 06:05:32,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:32,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2108722015, now seen corresponding path program 1 times [2021-12-16 06:05:32,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:32,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866290491] [2021-12-16 06:05:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:32,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:32,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:32,193 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:32,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-16 06:05:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:32,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 06:05:32,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:32,780 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 6 treesize of output 5 [2021-12-16 06:05:32,871 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 7 treesize of output 3 [2021-12-16 06:05:33,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:33,131 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 06:05:33,659 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 06:05:33,659 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 29 treesize of output 30 [2021-12-16 06:05:33,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:33,760 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 25 treesize of output 25 [2021-12-16 06:05:33,909 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 26 treesize of output 14 [2021-12-16 06:05:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:05:34,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:34,219 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1472 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| v_ArrVal_1472) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv1 1)))) is different from false [2021-12-16 06:05:34,229 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1471 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1472 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_1471) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| v_ArrVal_1472) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv1 1)))) is different from false [2021-12-16 06:05:34,257 INFO L354 Elim1Store]: treesize reduction 5, result has 72.2 percent of original size [2021-12-16 06:05:34,257 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 26 treesize of output 25 [2021-12-16 06:05:34,263 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1471 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1472 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_circular_insert_~last~1#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_1471) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| v_ArrVal_1472) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2021-12-16 06:05:34,272 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1471 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1472 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_circular_insert_~last~1#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~last~1#1.base| v_ArrVal_1471) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| v_ArrVal_1472) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2021-12-16 06:05:34,280 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1471 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1472 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.base| v_ArrVal_1471) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| v_ArrVal_1472) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2021-12-16 06:05:34,290 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1471 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1472 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~head#1.base|) |c_ULTIMATE.start_sll_circular_insert_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1471) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| v_ArrVal_1472) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-16 06:05:34,300 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1471 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1472 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~head#1.base|) |c_ULTIMATE.start_sll_circular_insert_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1471) |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.base| v_ArrVal_1472) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-16 06:05:34,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:34,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866290491] [2021-12-16 06:05:34,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866290491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:34,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1055066561] [2021-12-16 06:05:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:34,519 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:05:34,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:05:34,520 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:05:34,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-16 06:05:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:34,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 06:05:34,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:35,758 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 7 treesize of output 3 [2021-12-16 06:05:35,852 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 06:05:36,307 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 06:05:36,308 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 06:05:36,323 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 06:05:36,712 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 06:05:37,514 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-16 06:05:37,514 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 31 treesize of output 29 [2021-12-16 06:05:37,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:37,763 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-16 06:05:37,763 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 2 case distinctions, treesize of input 46 treesize of output 54 [2021-12-16 06:05:37,784 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 06:05:38,181 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:05:38,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 34 [2021-12-16 06:05:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:05:46,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:46,995 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1550 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| v_ArrVal_1550) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv1 1)))) is different from false [2021-12-16 06:05:47,009 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1550 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|)) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| v_ArrVal_1550) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv1 1)))) is different from false [2021-12-16 06:05:47,590 INFO L354 Elim1Store]: treesize reduction 19, result has 64.8 percent of original size [2021-12-16 06:05:47,590 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 61 [2021-12-16 06:05:47,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 06:05:47,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 89 [2021-12-16 06:05:47,639 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 06:05:50,099 INFO L354 Elim1Store]: treesize reduction -1, result has 104.0 percent of original size [2021-12-16 06:05:50,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 73 [2021-12-16 06:05:53,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 06:05:53,152 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-12-16 06:05:53,159 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 8 treesize of output 4 [2021-12-16 06:05:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 1 not checked. [2021-12-16 06:05:53,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1055066561] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:05:53,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:05:53,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 15] total 60 [2021-12-16 06:05:53,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389829085] [2021-12-16 06:05:53,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:53,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-16 06:05:53,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:53,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-16 06:05:53,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3299, Unknown=42, NotChecked=1116, Total=4692 [2021-12-16 06:05:53,323 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 61 states, 57 states have (on average 2.017543859649123) internal successors, (115), 54 states have internal predecessors, (115), 6 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9)