./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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_remove_all.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 cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:47:30,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:47:30,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:47:30,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:47:30,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:47:30,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:47:30,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:47:30,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:47:30,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:47:30,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:47:30,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:47:30,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:47:30,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:47:30,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:47:30,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:47:30,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:47:30,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:47:30,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:47:30,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:47:30,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:47:30,374 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:47:30,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:47:30,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:47:30,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:47:30,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:47:30,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:47:30,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:47:30,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:47:30,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:47:30,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:47:30,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:47:30,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:47:30,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:47:30,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:47:30,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:47:30,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:47:30,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:47:30,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:47:30,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:47:30,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:47:30,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:47:30,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:47:30,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:47:30,432 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:47:30,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:47:30,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:47:30,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:47:30,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:47:30,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:47:30,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:47:30,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:47:30,435 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:47:30,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:47:30,436 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:47:30,436 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:47:30,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:47:30,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:47:30,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:47:30,437 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:47:30,437 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:47:30,437 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:47:30,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:47:30,437 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:47:30,438 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:47:30,438 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:47:30,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:47:30,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:47:30,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:47:30,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:47:30,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:47:30,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:47:30,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:47:30,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:47:30,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 [2022-07-21 17:47:30,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:47:30,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:47:30,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:47:30,786 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:47:30,788 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:47:30,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2022-07-21 17:47:30,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4b02acd0/6d4a6b78dfea4cf7a402024dce282802/FLAG814dd5c5d [2022-07-21 17:47:31,372 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:47:31,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2022-07-21 17:47:31,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4b02acd0/6d4a6b78dfea4cf7a402024dce282802/FLAG814dd5c5d [2022-07-21 17:47:31,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4b02acd0/6d4a6b78dfea4cf7a402024dce282802 [2022-07-21 17:47:31,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:47:31,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:47:31,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:47:31,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:47:31,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:47:31,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:47:31" (1/1) ... [2022-07-21 17:47:31,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63fab6ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:31, skipping insertion in model container [2022-07-21 17:47:31,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:47:31" (1/1) ... [2022-07-21 17:47:31,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:47:31,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:47:32,177 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_remove_all.i[24082,24095] [2022-07-21 17:47:32,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:47:32,188 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:47:32,234 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_remove_all.i[24082,24095] [2022-07-21 17:47:32,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:47:32,262 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:47:32,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32 WrapperNode [2022-07-21 17:47:32,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:47:32,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:47:32,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:47:32,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:47:32,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32" (1/1) ... [2022-07-21 17:47:32,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32" (1/1) ... [2022-07-21 17:47:32,303 INFO L137 Inliner]: procedures = 126, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 117 [2022-07-21 17:47:32,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:47:32,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:47:32,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:47:32,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:47:32,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32" (1/1) ... [2022-07-21 17:47:32,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32" (1/1) ... [2022-07-21 17:47:32,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32" (1/1) ... [2022-07-21 17:47:32,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32" (1/1) ... [2022-07-21 17:47:32,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32" (1/1) ... [2022-07-21 17:47:32,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32" (1/1) ... [2022-07-21 17:47:32,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32" (1/1) ... [2022-07-21 17:47:32,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:47:32,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:47:32,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:47:32,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:47:32,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32" (1/1) ... [2022-07-21 17:47:32,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:47:32,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:47:32,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:47:32,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:47:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:47:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-21 17:47:32,457 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-21 17:47:32,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:47:32,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:47:32,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:47:32,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:47:32,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:47:32,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:47:32,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:47:32,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 17:47:32,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:47:32,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:47:32,591 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:47:32,593 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:47:32,916 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:47:32,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:47:32,922 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 17:47:32,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:47:32 BoogieIcfgContainer [2022-07-21 17:47:32,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:47:32,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:47:32,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:47:32,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:47:32,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:47:31" (1/3) ... [2022-07-21 17:47:32,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3fa731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:47:32, skipping insertion in model container [2022-07-21 17:47:32,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:32" (2/3) ... [2022-07-21 17:47:32,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3fa731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:47:32, skipping insertion in model container [2022-07-21 17:47:32,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:47:32" (3/3) ... [2022-07-21 17:47:32,930 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2022-07-21 17:47:32,942 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:47:32,946 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-07-21 17:47:33,004 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:47:33,013 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@11239332, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@29fe85e5 [2022-07-21 17:47:33,013 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-07-21 17:47:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:33,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:47:33,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:33,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:47:33,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash 893736149, now seen corresponding path program 1 times [2022-07-21 17:47:33,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:33,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105847391] [2022-07-21 17:47:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:33,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:47:33,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:33,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105847391] [2022-07-21 17:47:33,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105847391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:33,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:47:33,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:47:33,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743646965] [2022-07-21 17:47:33,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:33,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:47:33,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:47:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:47:33,278 INFO L87 Difference]: Start difference. First operand has 93 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2022-07-21 17:47:33,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:33,393 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-07-21 17:47:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:47:33,395 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 [2022-07-21 17:47:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:33,402 INFO L225 Difference]: With dead ends: 91 [2022-07-21 17:47:33,402 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 17:47:33,403 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:47:33,406 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:33,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 134 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:47:33,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 17:47:33,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-21 17:47:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 84 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-07-21 17:47:33,451 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 6 [2022-07-21 17:47:33,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:33,451 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-07-21 17:47:33,452 INFO L496 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) [2022-07-21 17:47:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-07-21 17:47:33,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:47:33,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:33,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:47:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:47:33,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash 893736150, now seen corresponding path program 1 times [2022-07-21 17:47:33,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:33,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604146050] [2022-07-21 17:47:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:33,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:47:33,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:33,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604146050] [2022-07-21 17:47:33,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604146050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:33,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:47:33,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:47:33,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115759970] [2022-07-21 17:47:33,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:33,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:47:33,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:33,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:47:33,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:47:33,501 INFO L87 Difference]: Start difference. First operand 88 states and 92 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) [2022-07-21 17:47:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:33,554 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-07-21 17:47:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:47:33,555 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 [2022-07-21 17:47:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:33,556 INFO L225 Difference]: With dead ends: 86 [2022-07-21 17:47:33,556 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 17:47:33,557 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:47:33,558 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:33,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 136 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:47:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 17:47:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-07-21 17:47:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 82 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-07-21 17:47:33,566 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 6 [2022-07-21 17:47:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:33,566 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-07-21 17:47:33,566 INFO L496 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) [2022-07-21 17:47:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-07-21 17:47:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:47:33,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:33,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:47:33,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1919809879, now seen corresponding path program 1 times [2022-07-21 17:47:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:33,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858952827] [2022-07-21 17:47:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:33,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:47:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:47:33,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:33,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858952827] [2022-07-21 17:47:33,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858952827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:33,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:47:33,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:47:33,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911689720] [2022-07-21 17:47:33,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:33,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:47:33,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:33,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:47:33,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:47:33,643 INFO L87 Difference]: Start difference. First operand 86 states and 90 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) [2022-07-21 17:47:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:33,723 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-07-21 17:47:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:47:33,724 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 [2022-07-21 17:47:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:33,725 INFO L225 Difference]: With dead ends: 93 [2022-07-21 17:47:33,725 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 17:47:33,726 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:47:33,727 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 5 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:33,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 201 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:47:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 17:47:33,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-07-21 17:47:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 46 states have (on average 1.891304347826087) internal successors, (87), 83 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-07-21 17:47:33,736 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 13 [2022-07-21 17:47:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:33,736 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-07-21 17:47:33,737 INFO L496 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) [2022-07-21 17:47:33,737 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-07-21 17:47:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:47:33,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:33,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:33,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:47:33,738 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:33,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:33,739 INFO L85 PathProgramCache]: Analyzing trace with hash 951797020, now seen corresponding path program 1 times [2022-07-21 17:47:33,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:33,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317693837] [2022-07-21 17:47:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:33,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:33,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:47:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:33,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 17:47:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:47:33,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:33,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317693837] [2022-07-21 17:47:33,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317693837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:33,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:47:33,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:47:33,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107709022] [2022-07-21 17:47:33,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:33,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:47:33,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:33,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:47:33,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:47:33,866 INFO L87 Difference]: Start difference. First operand 87 states and 91 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) [2022-07-21 17:47:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:34,063 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2022-07-21 17:47:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:47:34,063 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 [2022-07-21 17:47:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:34,066 INFO L225 Difference]: With dead ends: 141 [2022-07-21 17:47:34,066 INFO L226 Difference]: Without dead ends: 141 [2022-07-21 17:47:34,066 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:47:34,067 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 67 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:34,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 245 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:47:34,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-21 17:47:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 86. [2022-07-21 17:47:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 82 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-07-21 17:47:34,075 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 22 [2022-07-21 17:47:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:34,075 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-07-21 17:47:34,075 INFO L496 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) [2022-07-21 17:47:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-07-21 17:47:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:47:34,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:34,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:34,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:47:34,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:34,078 INFO L85 PathProgramCache]: Analyzing trace with hash 951797021, now seen corresponding path program 1 times [2022-07-21 17:47:34,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:34,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768510604] [2022-07-21 17:47:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:34,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:34,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:47:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:34,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 17:47:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:34,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:34,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768510604] [2022-07-21 17:47:34,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768510604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:34,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:47:34,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:47:34,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131074303] [2022-07-21 17:47:34,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:34,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:47:34,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:34,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:47:34,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:47:34,212 INFO L87 Difference]: Start difference. First operand 86 states and 90 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) [2022-07-21 17:47:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:34,372 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-07-21 17:47:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:47:34,375 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 [2022-07-21 17:47:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:34,376 INFO L225 Difference]: With dead ends: 86 [2022-07-21 17:47:34,377 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 17:47:34,377 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:47:34,380 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 76 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:34,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 231 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:47:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 17:47:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-07-21 17:47:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 81 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-07-21 17:47:34,390 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 22 [2022-07-21 17:47:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:34,391 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-07-21 17:47:34,391 INFO L496 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) [2022-07-21 17:47:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-07-21 17:47:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:47:34,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:34,392 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:34,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 17:47:34,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:34,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:34,393 INFO L85 PathProgramCache]: Analyzing trace with hash -389076539, now seen corresponding path program 1 times [2022-07-21 17:47:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:34,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909564008] [2022-07-21 17:47:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:34,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:47:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:34,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 17:47:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:47:34,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:34,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909564008] [2022-07-21 17:47:34,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909564008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:34,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985091967] [2022-07-21 17:47:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:34,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:34,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:47:34,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:47:34,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:47:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:34,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:47:34,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:34,763 INFO L390 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 [2022-07-21 17:47:34,939 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:47:34,940 INFO L390 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 [2022-07-21 17:47:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:34,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:47:35,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985091967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:35,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:47:35,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-07-21 17:47:35,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161660215] [2022-07-21 17:47:35,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:47:35,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:47:35,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:47:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:47:35,023 INFO L87 Difference]: Start difference. First operand 85 states and 89 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) [2022-07-21 17:47:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:35,220 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2022-07-21 17:47:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:47:35,221 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 [2022-07-21 17:47:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:35,222 INFO L225 Difference]: With dead ends: 138 [2022-07-21 17:47:35,222 INFO L226 Difference]: Without dead ends: 138 [2022-07-21 17:47:35,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:47:35,223 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 65 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:35,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 247 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 2 Unchecked, 0.2s Time] [2022-07-21 17:47:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-21 17:47:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 84. [2022-07-21 17:47:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.826086956521739) internal successors, (84), 80 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-07-21 17:47:35,228 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 25 [2022-07-21 17:47:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:35,228 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-07-21 17:47:35,228 INFO L496 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) [2022-07-21 17:47:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-07-21 17:47:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:47:35,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:35,229 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:35,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:35,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 17:47:35,430 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash -389076538, now seen corresponding path program 1 times [2022-07-21 17:47:35,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:35,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627104297] [2022-07-21 17:47:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:35,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:35,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:47:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:35,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 17:47:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:35,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:35,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627104297] [2022-07-21 17:47:35,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627104297] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:35,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297513065] [2022-07-21 17:47:35,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:35,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:35,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:47:35,640 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:47:35,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:47:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:35,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 17:47:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:35,764 INFO L390 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 [2022-07-21 17:47:36,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:36,057 INFO L390 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 14 treesize of output 16 [2022-07-21 17:47:36,064 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:47:36,065 INFO L390 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 [2022-07-21 17:47:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:47:36,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:47:36,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297513065] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:36,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:47:36,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2022-07-21 17:47:36,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614009911] [2022-07-21 17:47:36,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:47:36,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 17:47:36,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:36,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 17:47:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:47:36,214 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 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) [2022-07-21 17:47:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:36,597 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2022-07-21 17:47:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:47:36,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 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 [2022-07-21 17:47:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:36,599 INFO L225 Difference]: With dead ends: 138 [2022-07-21 17:47:36,599 INFO L226 Difference]: Without dead ends: 138 [2022-07-21 17:47:36,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:47:36,600 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 372 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:36,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 286 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 558 Invalid, 0 Unknown, 3 Unchecked, 0.3s Time] [2022-07-21 17:47:36,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-21 17:47:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 83. [2022-07-21 17:47:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 79 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-07-21 17:47:36,606 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 25 [2022-07-21 17:47:36,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:36,607 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-07-21 17:47:36,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 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) [2022-07-21 17:47:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-07-21 17:47:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:47:36,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:36,608 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:36,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:36,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-21 17:47:36,824 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:36,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash 904455987, now seen corresponding path program 1 times [2022-07-21 17:47:36,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:36,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679881961] [2022-07-21 17:47:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:36,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:36,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:47:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:36,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 17:47:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:47:36,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:36,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679881961] [2022-07-21 17:47:36,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679881961] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:36,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826966772] [2022-07-21 17:47:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:36,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:36,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:47:36,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:47:36,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:47:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:47:37,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:47:37,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:47:37,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826966772] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:37,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:47:37,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-07-21 17:47:37,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947503840] [2022-07-21 17:47:37,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:37,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:47:37,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:37,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:47:37,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:47:37,084 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:47:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:37,095 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2022-07-21 17:47:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:47:37,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-07-21 17:47:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:37,098 INFO L225 Difference]: With dead ends: 138 [2022-07-21 17:47:37,098 INFO L226 Difference]: Without dead ends: 138 [2022-07-21 17:47:37,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:47:37,099 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 122 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:37,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 171 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:47:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-21 17:47:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 84. [2022-07-21 17:47:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 80 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-07-21 17:47:37,119 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 29 [2022-07-21 17:47:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:37,120 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-07-21 17:47:37,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:47:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-07-21 17:47:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:47:37,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:37,122 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:37,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:37,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:37,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:37,336 INFO L85 PathProgramCache]: Analyzing trace with hash 904455976, now seen corresponding path program 1 times [2022-07-21 17:47:37,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:37,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433681054] [2022-07-21 17:47:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:37,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:37,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:47:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:37,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 17:47:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:47:37,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:37,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433681054] [2022-07-21 17:47:37,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433681054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:37,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847942735] [2022-07-21 17:47:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:37,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:37,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:47:37,504 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:47:37,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:47:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:37,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:47:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:37,627 INFO L390 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 [2022-07-21 17:47:37,650 INFO L390 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 [2022-07-21 17:47:37,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:37,747 INFO L390 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 [2022-07-21 17:47:37,759 INFO L390 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 [2022-07-21 17:47:37,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:37,850 INFO L390 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 [2022-07-21 17:47:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:47:37,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:47:37,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847942735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:37,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:47:37,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2022-07-21 17:47:37,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737674179] [2022-07-21 17:47:37,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:47:37,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:47:37,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:37,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:47:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:47:37,921 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:47:38,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:38,211 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2022-07-21 17:47:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:47:38,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-07-21 17:47:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:38,212 INFO L225 Difference]: With dead ends: 127 [2022-07-21 17:47:38,212 INFO L226 Difference]: Without dead ends: 127 [2022-07-21 17:47:38,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:47:38,213 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 145 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:38,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 321 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 354 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-07-21 17:47:38,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-21 17:47:38,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2022-07-21 17:47:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.6875) internal successors, (81), 76 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-07-21 17:47:38,217 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 29 [2022-07-21 17:47:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:38,217 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-07-21 17:47:38,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:47:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-07-21 17:47:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:47:38,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:38,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:38,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:38,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:38,418 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:38,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:38,419 INFO L85 PathProgramCache]: Analyzing trace with hash 904455977, now seen corresponding path program 1 times [2022-07-21 17:47:38,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:38,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908367098] [2022-07-21 17:47:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:38,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:47:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:38,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 17:47:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:47:38,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:38,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908367098] [2022-07-21 17:47:38,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908367098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:38,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356025024] [2022-07-21 17:47:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:38,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:38,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:47:38,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:47:38,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:47:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:38,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:47:38,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:38,747 INFO L390 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 [2022-07-21 17:47:38,765 INFO L390 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 [2022-07-21 17:47:38,878 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-21 17:47:38,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:39,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 17:47:39,080 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 54789 column 46: unknown constant v_#length_BEFORE_CALL_4 at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.checkOrAddAxiom(DiffWrapperScript.java:161) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.convertApplicationTerm(DiffWrapperScript.java:171) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:352) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:109) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertTerm(ManagedScript.java:134) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:824) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:768) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) 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) [2022-07-21 17:47:39,083 INFO L158 Benchmark]: Toolchain (without parser) took 7217.19ms. Allocated memory was 56.6MB in the beginning and 100.7MB in the end (delta: 44.0MB). Free memory was 34.2MB in the beginning and 50.4MB in the end (delta: -16.2MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. [2022-07-21 17:47:39,083 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 38.8MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:47:39,083 INFO L158 Benchmark]: CACSL2BoogieTranslator took 396.04ms. Allocated memory is still 56.6MB. Free memory was 34.0MB in the beginning and 32.5MB in the end (delta: 1.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 17:47:39,084 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.54ms. Allocated memory is still 56.6MB. Free memory was 32.5MB in the beginning and 30.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:47:39,084 INFO L158 Benchmark]: Boogie Preprocessor took 62.30ms. Allocated memory is still 56.6MB. Free memory was 30.4MB in the beginning and 28.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:47:39,084 INFO L158 Benchmark]: RCFGBuilder took 557.28ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 28.8MB in the beginning and 36.6MB in the end (delta: -7.8MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. [2022-07-21 17:47:39,084 INFO L158 Benchmark]: TraceAbstraction took 6157.23ms. Allocated memory was 69.2MB in the beginning and 100.7MB in the end (delta: 31.5MB). Free memory was 36.1MB in the beginning and 50.4MB in the end (delta: -14.3MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2022-07-21 17:47:39,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 38.8MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 396.04ms. Allocated memory is still 56.6MB. Free memory was 34.0MB in the beginning and 32.5MB in the end (delta: 1.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.54ms. Allocated memory is still 56.6MB. Free memory was 32.5MB in the beginning and 30.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.30ms. Allocated memory is still 56.6MB. Free memory was 30.4MB in the beginning and 28.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 557.28ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 28.8MB in the beginning and 36.6MB in the end (delta: -7.8MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. * TraceAbstraction took 6157.23ms. Allocated memory was 69.2MB in the beginning and 100.7MB in the end (delta: 31.5MB). Free memory was 36.1MB in the beginning and 50.4MB in the end (delta: -14.3MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 54789 column 46: unknown constant v_#length_BEFORE_CALL_4 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 54789 column 46: unknown constant v_#length_BEFORE_CALL_4: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-21 17:47:39,103 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_remove_all.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 cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:47:41,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:47:41,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:47:41,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:47:41,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:47:41,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:47:41,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:47:41,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:47:41,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:47:41,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:47:41,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:47:41,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:47:41,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:47:41,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:47:41,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:47:41,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:47:41,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:47:41,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:47:41,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:47:41,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:47:41,157 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:47:41,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:47:41,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:47:41,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:47:41,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:47:41,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:47:41,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:47:41,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:47:41,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:47:41,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:47:41,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:47:41,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:47:41,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:47:41,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:47:41,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:47:41,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:47:41,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:47:41,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:47:41,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:47:41,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:47:41,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:47:41,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:47:41,184 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:47:41,222 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:47:41,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:47:41,223 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:47:41,223 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:47:41,224 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:47:41,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:47:41,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:47:41,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:47:41,225 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:47:41,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:47:41,225 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:47:41,226 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:47:41,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:47:41,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:47:41,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:47:41,226 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:47:41,227 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:47:41,227 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:47:41,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:47:41,227 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:47:41,227 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:47:41,228 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:47:41,228 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:47:41,228 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:47:41,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:47:41,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:47:41,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:47:41,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:47:41,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:47:41,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:47:41,229 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:47:41,229 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:47:41,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:47:41,230 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 [2022-07-21 17:47:41,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:47:41,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:47:41,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:47:41,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:47:41,565 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:47:41,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2022-07-21 17:47:41,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c2bf0e0/9ff94fbdd3c748c28128378ca184e89a/FLAG8d5d0c83a [2022-07-21 17:47:42,089 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:47:42,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2022-07-21 17:47:42,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c2bf0e0/9ff94fbdd3c748c28128378ca184e89a/FLAG8d5d0c83a [2022-07-21 17:47:42,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c2bf0e0/9ff94fbdd3c748c28128378ca184e89a [2022-07-21 17:47:42,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:47:42,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:47:42,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:47:42,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:47:42,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:47:42,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:47:42" (1/1) ... [2022-07-21 17:47:42,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e26fa73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:42, skipping insertion in model container [2022-07-21 17:47:42,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:47:42" (1/1) ... [2022-07-21 17:47:42,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:47:42,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:47:42,954 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_remove_all.i[24082,24095] [2022-07-21 17:47:42,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:47:42,975 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:47:43,026 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_remove_all.i[24082,24095] [2022-07-21 17:47:43,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:47:43,069 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:47:43,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43 WrapperNode [2022-07-21 17:47:43,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:47:43,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:47:43,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:47:43,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:47:43,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43" (1/1) ... [2022-07-21 17:47:43,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43" (1/1) ... [2022-07-21 17:47:43,141 INFO L137 Inliner]: procedures = 129, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 118 [2022-07-21 17:47:43,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:47:43,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:47:43,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:47:43,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:47:43,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43" (1/1) ... [2022-07-21 17:47:43,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43" (1/1) ... [2022-07-21 17:47:43,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43" (1/1) ... [2022-07-21 17:47:43,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43" (1/1) ... [2022-07-21 17:47:43,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43" (1/1) ... [2022-07-21 17:47:43,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43" (1/1) ... [2022-07-21 17:47:43,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43" (1/1) ... [2022-07-21 17:47:43,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:47:43,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:47:43,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:47:43,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:47:43,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43" (1/1) ... [2022-07-21 17:47:43,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:47:43,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:47:43,230 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:47:43,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:47:43,271 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-21 17:47:43,272 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-21 17:47:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:47:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:47:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:47:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:47:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:47:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:47:43,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-21 17:47:43,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:47:43,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 17:47:43,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:47:43,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:47:43,415 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:47:43,416 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:47:43,764 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:47:43,774 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:47:43,774 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 17:47:43,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:47:43 BoogieIcfgContainer [2022-07-21 17:47:43,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:47:43,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:47:43,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:47:43,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:47:43,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:47:42" (1/3) ... [2022-07-21 17:47:43,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31dcbff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:47:43, skipping insertion in model container [2022-07-21 17:47:43,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:47:43" (2/3) ... [2022-07-21 17:47:43,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31dcbff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:47:43, skipping insertion in model container [2022-07-21 17:47:43,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:47:43" (3/3) ... [2022-07-21 17:47:43,786 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2022-07-21 17:47:43,798 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:47:43,799 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-07-21 17:47:43,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:47:43,844 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1969908e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@34ed6b5f [2022-07-21 17:47:43,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-07-21 17:47:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:47:43,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:43,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:47:43,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:43,859 INFO L85 PathProgramCache]: Analyzing trace with hash 893736149, now seen corresponding path program 1 times [2022-07-21 17:47:43,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:47:43,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834347258] [2022-07-21 17:47:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:43,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:47:43,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:47:43,876 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) [2022-07-21 17:47:43,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 17:47:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:43,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:47:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:44,053 INFO L390 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 [2022-07-21 17:47:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:47:44,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:47:44,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:47:44,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834347258] [2022-07-21 17:47:44,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834347258] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:44,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:47:44,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:47:44,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252676151] [2022-07-21 17:47:44,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:44,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:47:44,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:47:44,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:47:44,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:47:44,102 INFO L87 Difference]: Start difference. First operand has 93 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2022-07-21 17:47:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:44,272 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-07-21 17:47:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:47:44,274 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 [2022-07-21 17:47:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:44,280 INFO L225 Difference]: With dead ends: 91 [2022-07-21 17:47:44,281 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 17:47:44,282 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:47:44,285 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:44,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 134 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:47:44,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 17:47:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-21 17:47:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 84 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-07-21 17:47:44,324 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 6 [2022-07-21 17:47:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:44,324 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-07-21 17:47:44,325 INFO L496 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) [2022-07-21 17:47:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-07-21 17:47:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:47:44,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:44,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:47:44,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 17:47:44,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:47:44,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:44,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:44,535 INFO L85 PathProgramCache]: Analyzing trace with hash 893736150, now seen corresponding path program 1 times [2022-07-21 17:47:44,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:47:44,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874097687] [2022-07-21 17:47:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:44,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:47:44,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:47:44,539 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) [2022-07-21 17:47:44,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 17:47:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:44,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:47:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:44,624 INFO L390 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 [2022-07-21 17:47:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:47:44,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:47:44,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:47:44,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874097687] [2022-07-21 17:47:44,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874097687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:44,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:47:44,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:47:44,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596221] [2022-07-21 17:47:44,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:44,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:47:44,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:47:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:47:44,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:47:44,659 INFO L87 Difference]: Start difference. First operand 88 states and 92 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) [2022-07-21 17:47:44,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:44,821 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-07-21 17:47:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:47:44,822 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 [2022-07-21 17:47:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:44,822 INFO L225 Difference]: With dead ends: 86 [2022-07-21 17:47:44,823 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 17:47:44,823 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:47:44,824 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:44,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 136 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:47:44,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 17:47:44,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-07-21 17:47:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 82 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-07-21 17:47:44,831 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 6 [2022-07-21 17:47:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:44,831 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-07-21 17:47:44,832 INFO L496 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) [2022-07-21 17:47:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-07-21 17:47:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:47:44,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:44,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:44,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:45,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:47:45,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1919809879, now seen corresponding path program 1 times [2022-07-21 17:47:45,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:47:45,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116148463] [2022-07-21 17:47:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:45,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:47:45,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:47:45,036 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) [2022-07-21 17:47:45,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 17:47:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:45,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:47:45,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:47:45,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:47:45,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:47:45,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116148463] [2022-07-21 17:47:45,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116148463] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:45,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:47:45,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:47:45,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430687867] [2022-07-21 17:47:45,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:45,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:47:45,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:47:45,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:47:45,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:47:45,120 INFO L87 Difference]: Start difference. First operand 86 states and 90 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) [2022-07-21 17:47:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:45,131 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-07-21 17:47:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:47:45,132 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 [2022-07-21 17:47:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:45,133 INFO L225 Difference]: With dead ends: 93 [2022-07-21 17:47:45,133 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 17:47:45,133 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:47:45,134 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 173 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 [2022-07-21 17:47:45,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 173 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:47:45,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 17:47:45,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-07-21 17:47:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 46 states have (on average 1.891304347826087) internal successors, (87), 83 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-07-21 17:47:45,143 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 13 [2022-07-21 17:47:45,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:45,143 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-07-21 17:47:45,143 INFO L496 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) [2022-07-21 17:47:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-07-21 17:47:45,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:47:45,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:45,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:45,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:45,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:47:45,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:45,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:45,362 INFO L85 PathProgramCache]: Analyzing trace with hash 951797020, now seen corresponding path program 1 times [2022-07-21 17:47:45,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:47:45,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82507730] [2022-07-21 17:47:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:45,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:47:45,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:47:45,364 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) [2022-07-21 17:47:45,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 17:47:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:45,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:47:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:45,495 INFO L390 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 [2022-07-21 17:47:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:45,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:47:45,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:47:45,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82507730] [2022-07-21 17:47:45,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82507730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:45,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:47:45,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:47:45,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016197059] [2022-07-21 17:47:45,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:45,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:47:45,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:47:45,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:47:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:47:45,554 INFO L87 Difference]: Start difference. First operand 87 states and 91 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) [2022-07-21 17:47:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:45,925 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2022-07-21 17:47:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:47:45,926 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 [2022-07-21 17:47:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:45,928 INFO L225 Difference]: With dead ends: 141 [2022-07-21 17:47:45,929 INFO L226 Difference]: Without dead ends: 141 [2022-07-21 17:47:45,929 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:47:45,930 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 66 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:45,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 220 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:47:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-21 17:47:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 86. [2022-07-21 17:47:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 82 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-07-21 17:47:45,938 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 22 [2022-07-21 17:47:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:45,938 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-07-21 17:47:45,939 INFO L496 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) [2022-07-21 17:47:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-07-21 17:47:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:47:45,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:45,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:45,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:46,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:47:46,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:46,148 INFO L85 PathProgramCache]: Analyzing trace with hash 951797021, now seen corresponding path program 1 times [2022-07-21 17:47:46,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:47:46,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811849708] [2022-07-21 17:47:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:46,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:47:46,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:47:46,150 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) [2022-07-21 17:47:46,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 17:47:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:46,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:47:46,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:46,259 INFO L390 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 [2022-07-21 17:47:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:46,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:47:46,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:47:46,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811849708] [2022-07-21 17:47:46,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811849708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:46,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:47:46,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:47:46,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025914532] [2022-07-21 17:47:46,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:46,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:47:46,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:47:46,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:47:46,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:47:46,344 INFO L87 Difference]: Start difference. First operand 86 states and 90 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) [2022-07-21 17:47:46,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:46,676 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-07-21 17:47:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:47:46,677 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 [2022-07-21 17:47:46,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:46,678 INFO L225 Difference]: With dead ends: 86 [2022-07-21 17:47:46,678 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 17:47:46,678 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:47:46,679 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 76 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:46,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 206 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:47:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 17:47:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-07-21 17:47:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 81 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:47:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-07-21 17:47:46,686 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 22 [2022-07-21 17:47:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:46,687 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-07-21 17:47:46,687 INFO L496 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) [2022-07-21 17:47:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-07-21 17:47:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:47:46,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:46,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:46,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:46,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:47:46,889 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:46,889 INFO L85 PathProgramCache]: Analyzing trace with hash -389076539, now seen corresponding path program 1 times [2022-07-21 17:47:46,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:47:46,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877260166] [2022-07-21 17:47:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:46,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:47:46,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:47:46,891 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) [2022-07-21 17:47:46,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 17:47:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:47,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:47:47,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:47,029 INFO L390 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 [2022-07-21 17:47:47,205 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:47:47,205 INFO L390 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 24 [2022-07-21 17:47:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:47,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:47:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:49,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:47:49,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877260166] [2022-07-21 17:47:49,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877260166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:47:49,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:47:49,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-21 17:47:49,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495832748] [2022-07-21 17:47:49,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:47:49,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:47:49,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:47:49,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:47:49,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=54, Unknown=1, NotChecked=0, Total=72 [2022-07-21 17:47:49,434 INFO L87 Difference]: Start difference. First operand 85 states and 89 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) [2022-07-21 17:47:49,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:49,847 INFO L93 Difference]: Finished difference Result 145 states and 151 transitions. [2022-07-21 17:47:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:47:49,848 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 [2022-07-21 17:47:49,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:49,849 INFO L225 Difference]: With dead ends: 145 [2022-07-21 17:47:49,849 INFO L226 Difference]: Without dead ends: 145 [2022-07-21 17:47:49,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2022-07-21 17:47:49,850 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:49,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 291 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 96 Unchecked, 0.4s Time] [2022-07-21 17:47:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-21 17:47:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2022-07-21 17:47:49,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 86 states have internal predecessors, (90), 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) [2022-07-21 17:47:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-07-21 17:47:49,856 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 25 [2022-07-21 17:47:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:49,857 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-07-21 17:47:49,857 INFO L496 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) [2022-07-21 17:47:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-07-21 17:47:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:47:49,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:49,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:49,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:50,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:47:50,068 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash -389076538, now seen corresponding path program 1 times [2022-07-21 17:47:50,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:47:50,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997589720] [2022-07-21 17:47:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:50,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:47:50,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:47:50,071 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) [2022-07-21 17:47:50,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 17:47:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:50,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:47:50,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:50,197 INFO L390 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 [2022-07-21 17:47:50,204 INFO L390 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 [2022-07-21 17:47:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:50,440 INFO L390 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 [2022-07-21 17:47:50,450 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:47:50,451 INFO L390 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 [2022-07-21 17:47:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:47:50,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:47:52,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:47:52,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997589720] [2022-07-21 17:47:52,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997589720] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:52,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [263820908] [2022-07-21 17:47:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:52,794 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:47:52,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:47:52,799 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) [2022-07-21 17:47:52,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-07-21 17:47:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:52,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:47:52,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:52,982 INFO L390 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 [2022-07-21 17:47:52,994 INFO L390 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 [2022-07-21 17:47:53,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:53,195 INFO L390 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 [2022-07-21 17:47:53,207 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:47:53,207 INFO L390 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 [2022-07-21 17:47:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:47:53,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:47:55,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [263820908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:55,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:47:55,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-21 17:47:55,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653098128] [2022-07-21 17:47:55,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:47:55,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:47:55,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:47:55,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:47:55,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2022-07-21 17:47:55,497 INFO L87 Difference]: Start difference. First operand 91 states and 94 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) [2022-07-21 17:47:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:56,258 INFO L93 Difference]: Finished difference Result 217 states and 228 transitions. [2022-07-21 17:47:56,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:47:56,259 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 [2022-07-21 17:47:56,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:56,260 INFO L225 Difference]: With dead ends: 217 [2022-07-21 17:47:56,260 INFO L226 Difference]: Without dead ends: 217 [2022-07-21 17:47:56,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=31, Invalid=124, Unknown=1, NotChecked=0, Total=156 [2022-07-21 17:47:56,261 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 123 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:56,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 267 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 341 Invalid, 0 Unknown, 119 Unchecked, 0.7s Time] [2022-07-21 17:47:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-21 17:47:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 97. [2022-07-21 17:47:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 91 states have internal predecessors, (96), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:47:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2022-07-21 17:47:56,270 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 25 [2022-07-21 17:47:56,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:56,271 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2022-07-21 17:47:56,271 INFO L496 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) [2022-07-21 17:47:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2022-07-21 17:47:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:47:56,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:56,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:56,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-07-21 17:47:56,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:56,675 WARN L477 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 [2022-07-21 17:47:56,675 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:56,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:56,676 INFO L85 PathProgramCache]: Analyzing trace with hash 904455987, now seen corresponding path program 1 times [2022-07-21 17:47:56,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:47:56,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436824390] [2022-07-21 17:47:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:56,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:47:56,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:47:56,678 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) [2022-07-21 17:47:56,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 17:47:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:47:56,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:47:56,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:47:56,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:47:56,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436824390] [2022-07-21 17:47:56,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436824390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:47:56,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:47:56,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:47:56,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198769693] [2022-07-21 17:47:56,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:47:56,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:47:56,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:47:56,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:47:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:47:56,848 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:47:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:56,876 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2022-07-21 17:47:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:47:56,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-07-21 17:47:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:56,878 INFO L225 Difference]: With dead ends: 152 [2022-07-21 17:47:56,878 INFO L226 Difference]: Without dead ends: 152 [2022-07-21 17:47:56,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:47:56,879 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 179 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:56,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 164 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:47:56,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-21 17:47:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 98. [2022-07-21 17:47:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 92 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:47:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2022-07-21 17:47:56,885 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 29 [2022-07-21 17:47:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:56,885 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2022-07-21 17:47:56,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:47:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2022-07-21 17:47:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:47:56,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:56,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:56,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:57,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:47:57,089 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash 904455976, now seen corresponding path program 1 times [2022-07-21 17:47:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:47:57,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450281376] [2022-07-21 17:47:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:57,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:47:57,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:47:57,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:47:57,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 17:47:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:57,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:47:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:57,228 INFO L390 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 [2022-07-21 17:47:57,358 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-21 17:47:57,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2022-07-21 17:47:57,496 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-21 17:47:57,497 INFO L390 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 18 treesize of output 27 [2022-07-21 17:47:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:58,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:47:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:58,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:47:58,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450281376] [2022-07-21 17:47:58,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450281376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:47:58,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:47:58,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-21 17:47:58,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280723731] [2022-07-21 17:47:58,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:47:58,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:47:58,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:47:58,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:47:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:47:58,677 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:47:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:59,124 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-07-21 17:47:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:47:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-21 17:47:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:59,126 INFO L225 Difference]: With dead ends: 134 [2022-07-21 17:47:59,126 INFO L226 Difference]: Without dead ends: 134 [2022-07-21 17:47:59,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:47:59,126 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 186 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:59,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 273 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 124 Invalid, 0 Unknown, 221 Unchecked, 0.3s Time] [2022-07-21 17:47:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-21 17:47:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 94. [2022-07-21 17:47:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 88 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:47:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2022-07-21 17:47:59,131 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 29 [2022-07-21 17:47:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:59,131 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2022-07-21 17:47:59,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:47:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2022-07-21 17:47:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:47:59,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:59,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:59,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:59,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:47:59,343 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:47:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash 904455977, now seen corresponding path program 1 times [2022-07-21 17:47:59,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:47:59,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664800673] [2022-07-21 17:47:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:59,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:47:59,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:47:59,345 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) [2022-07-21 17:47:59,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 17:47:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:59,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:47:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:59,494 INFO L390 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 [2022-07-21 17:47:59,509 INFO L390 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 [2022-07-21 17:47:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:59,623 INFO L390 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 [2022-07-21 17:47:59,636 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:47:59,636 INFO L390 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 [2022-07-21 17:47:59,748 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:47:59,748 INFO L390 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 [2022-07-21 17:48:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:48:00,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:48:00,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:00,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664800673] [2022-07-21 17:48:00,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664800673] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:48:00,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1564461614] [2022-07-21 17:48:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:00,440 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:48:00,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:48:00,441 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) [2022-07-21 17:48:00,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-07-21 17:48:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:00,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:48:00,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:00,650 INFO L390 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 [2022-07-21 17:48:00,697 INFO L390 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 [2022-07-21 17:48:00,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:48:00,833 INFO L390 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 [2022-07-21 17:48:00,914 INFO L390 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 [2022-07-21 17:48:03,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:48:03,107 INFO L390 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 [2022-07-21 17:48:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:48:03,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:48:03,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1564461614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:48:03,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:48:03,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-21 17:48:03,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055483499] [2022-07-21 17:48:03,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:48:03,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 17:48:03,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:03,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 17:48:03,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=352, Unknown=1, NotChecked=0, Total=420 [2022-07-21 17:48:03,635 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 17 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:06,341 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-07-21 17:48:06,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:48:06,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-07-21 17:48:06,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:06,343 INFO L225 Difference]: With dead ends: 130 [2022-07-21 17:48:06,343 INFO L226 Difference]: Without dead ends: 130 [2022-07-21 17:48:06,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=110, Invalid=644, Unknown=2, NotChecked=0, Total=756 [2022-07-21 17:48:06,344 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 11 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:06,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 582 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 284 Unchecked, 0.4s Time] [2022-07-21 17:48:06,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-21 17:48:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2022-07-21 17:48:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 80 states have (on average 1.4625) internal successors, (117), 109 states have internal predecessors, (117), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2022-07-21 17:48:06,349 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 29 [2022-07-21 17:48:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:06,349 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2022-07-21 17:48:06,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2022-07-21 17:48:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 17:48:06,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:06,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:06,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:48:06,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-07-21 17:48:06,751 WARN L477 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 [2022-07-21 17:48:06,751 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2026635805, now seen corresponding path program 1 times [2022-07-21 17:48:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:06,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715065939] [2022-07-21 17:48:06,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:06,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:06,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:06,753 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) [2022-07-21 17:48:06,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 17:48:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:06,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:48:06,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:06,861 INFO L390 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 [2022-07-21 17:48:06,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-21 17:48:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:48:06,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:48:06,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:06,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715065939] [2022-07-21 17:48:06,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715065939] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:48:06,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:48:06,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 17:48:06,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966303780] [2022-07-21 17:48:06,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:48:06,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:48:06,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:06,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:48:06,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:48:06,975 INFO L87 Difference]: Start difference. First operand 118 states and 125 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2022-07-21 17:48:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:07,969 INFO L93 Difference]: Finished difference Result 157 states and 165 transitions. [2022-07-21 17:48:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:48:07,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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 30 [2022-07-21 17:48:07,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:07,970 INFO L225 Difference]: With dead ends: 157 [2022-07-21 17:48:07,970 INFO L226 Difference]: Without dead ends: 157 [2022-07-21 17:48:07,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:48:07,972 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 201 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:07,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 376 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 17:48:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-21 17:48:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 119. [2022-07-21 17:48:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 81 states have (on average 1.4691358024691359) internal successors, (119), 110 states have internal predecessors, (119), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:07,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2022-07-21 17:48:07,975 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 30 [2022-07-21 17:48:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:07,976 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2022-07-21 17:48:07,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2022-07-21 17:48:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2022-07-21 17:48:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 17:48:07,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:07,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:07,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:48:08,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:48:08,192 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2026635804, now seen corresponding path program 1 times [2022-07-21 17:48:08,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:08,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689550120] [2022-07-21 17:48:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:08,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:08,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:08,198 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) [2022-07-21 17:48:08,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 17:48:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:08,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:48:08,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:08,338 INFO L390 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 [2022-07-21 17:48:08,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-21 17:48:08,505 INFO L390 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 [2022-07-21 17:48:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:48:08,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:48:08,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689550120] [2022-07-21 17:48:08,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689550120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:48:08,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:48:08,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 17:48:08,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314867782] [2022-07-21 17:48:08,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:48:08,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:48:08,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:08,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:48:08,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:48:08,533 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2022-07-21 17:48:09,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:09,634 INFO L93 Difference]: Finished difference Result 151 states and 159 transitions. [2022-07-21 17:48:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:48:09,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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 30 [2022-07-21 17:48:09,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:09,636 INFO L225 Difference]: With dead ends: 151 [2022-07-21 17:48:09,637 INFO L226 Difference]: Without dead ends: 151 [2022-07-21 17:48:09,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:48:09,637 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 366 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:09,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 289 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 17:48:09,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-21 17:48:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 119. [2022-07-21 17:48:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 81 states have (on average 1.4567901234567902) internal successors, (118), 110 states have internal predecessors, (118), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 126 transitions. [2022-07-21 17:48:09,642 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 126 transitions. Word has length 30 [2022-07-21 17:48:09,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:09,642 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 126 transitions. [2022-07-21 17:48:09,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2022-07-21 17:48:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 126 transitions. [2022-07-21 17:48:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 17:48:09,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:09,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:09,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-21 17:48:09,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:48:09,854 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:09,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1976823067, now seen corresponding path program 1 times [2022-07-21 17:48:09,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:09,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015812152] [2022-07-21 17:48:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:09,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:09,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:09,856 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:48:09,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 17:48:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:09,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:48:09,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:48:10,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:48:10,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015812152] [2022-07-21 17:48:10,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015812152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:48:10,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:48:10,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:48:10,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823076645] [2022-07-21 17:48:10,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:48:10,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:48:10,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:10,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:48:10,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:48:10,071 INFO L87 Difference]: Start difference. First operand 119 states and 126 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:48:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:10,210 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-07-21 17:48:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:48:10,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-07-21 17:48:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:10,211 INFO L225 Difference]: With dead ends: 112 [2022-07-21 17:48:10,211 INFO L226 Difference]: Without dead ends: 112 [2022-07-21 17:48:10,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:48:10,212 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 151 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:10,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 83 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:48:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-21 17:48:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-07-21 17:48:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 81 states have (on average 1.3703703703703705) internal successors, (111), 103 states have internal predecessors, (111), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 119 transitions. [2022-07-21 17:48:10,216 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 119 transitions. Word has length 32 [2022-07-21 17:48:10,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:10,216 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 119 transitions. [2022-07-21 17:48:10,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:48:10,217 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 119 transitions. [2022-07-21 17:48:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 17:48:10,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:10,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:10,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-21 17:48:10,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:48:10,428 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:10,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:10,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1055563858, now seen corresponding path program 1 times [2022-07-21 17:48:10,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:10,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112234451] [2022-07-21 17:48:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:10,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:10,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:10,430 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) [2022-07-21 17:48:10,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 17:48:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:10,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:48:10,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:10,706 INFO L390 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 [2022-07-21 17:48:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:48:10,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:48:10,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:10,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112234451] [2022-07-21 17:48:10,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112234451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:48:10,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:48:10,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 17:48:10,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693397030] [2022-07-21 17:48:10,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:48:10,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:48:10,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:10,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:48:10,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:48:10,730 INFO L87 Difference]: Start difference. First operand 112 states and 119 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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) [2022-07-21 17:48:11,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:11,536 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2022-07-21 17:48:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:48:11,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 35 [2022-07-21 17:48:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:11,538 INFO L225 Difference]: With dead ends: 161 [2022-07-21 17:48:11,538 INFO L226 Difference]: Without dead ends: 161 [2022-07-21 17:48:11,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:48:11,539 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 382 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:11,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 368 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:48:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-21 17:48:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2022-07-21 17:48:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 93 states have (on average 1.4193548387096775) internal successors, (132), 115 states have internal predecessors, (132), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2022-07-21 17:48:11,543 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 35 [2022-07-21 17:48:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:11,544 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2022-07-21 17:48:11,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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) [2022-07-21 17:48:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2022-07-21 17:48:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:48:11,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:11,545 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:11,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-21 17:48:11,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:48:11,756 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1636827734, now seen corresponding path program 1 times [2022-07-21 17:48:11,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:11,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130389276] [2022-07-21 17:48:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:11,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:11,758 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:48:11,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 17:48:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:11,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:48:11,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:11,883 INFO L390 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 [2022-07-21 17:48:11,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-21 17:48:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:48:12,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:48:12,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130389276] [2022-07-21 17:48:12,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130389276] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:48:12,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:48:12,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 17:48:12,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673456840] [2022-07-21 17:48:12,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:48:12,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:48:12,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:12,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:48:12,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:48:12,029 INFO L87 Difference]: Start difference. First operand 124 states and 140 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-07-21 17:48:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:13,115 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2022-07-21 17:48:13,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:48:13,116 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 36 [2022-07-21 17:48:13,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:13,116 INFO L225 Difference]: With dead ends: 153 [2022-07-21 17:48:13,117 INFO L226 Difference]: Without dead ends: 153 [2022-07-21 17:48:13,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:48:13,117 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 183 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:13,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 331 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 17:48:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-21 17:48:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 128. [2022-07-21 17:48:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 99 states have (on average 1.393939393939394) internal successors, (138), 119 states have internal predecessors, (138), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2022-07-21 17:48:13,122 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 36 [2022-07-21 17:48:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:13,122 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2022-07-21 17:48:13,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-07-21 17:48:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2022-07-21 17:48:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:48:13,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:13,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:13,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:48:13,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:48:13,327 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:13,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:13,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1636827733, now seen corresponding path program 1 times [2022-07-21 17:48:13,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:13,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95711940] [2022-07-21 17:48:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:13,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:13,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:13,330 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) [2022-07-21 17:48:13,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 17:48:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:13,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:48:13,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:13,453 INFO L390 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 [2022-07-21 17:48:13,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-21 17:48:13,658 INFO L390 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 [2022-07-21 17:48:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:48:13,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:48:13,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:13,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95711940] [2022-07-21 17:48:13,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95711940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:48:13,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:48:13,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 17:48:13,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024650056] [2022-07-21 17:48:13,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:48:13,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:48:13,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:13,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:48:13,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:48:13,723 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-07-21 17:48:14,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:14,693 INFO L93 Difference]: Finished difference Result 171 states and 189 transitions. [2022-07-21 17:48:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:48:14,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 36 [2022-07-21 17:48:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:14,694 INFO L225 Difference]: With dead ends: 171 [2022-07-21 17:48:14,694 INFO L226 Difference]: Without dead ends: 171 [2022-07-21 17:48:14,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:48:14,695 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 368 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:14,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 357 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 17:48:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-21 17:48:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 132. [2022-07-21 17:48:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 123 states have internal predecessors, (142), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2022-07-21 17:48:14,699 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 36 [2022-07-21 17:48:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:14,700 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2022-07-21 17:48:14,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-07-21 17:48:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2022-07-21 17:48:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:48:14,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:14,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:14,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:48:14,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:48:14,914 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:14,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1637258683, now seen corresponding path program 1 times [2022-07-21 17:48:14,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:14,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975706658] [2022-07-21 17:48:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:14,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:14,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:14,916 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) [2022-07-21 17:48:14,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-21 17:48:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:15,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:48:15,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:15,584 INFO L390 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 [2022-07-21 17:48:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:48:15,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:48:15,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975706658] [2022-07-21 17:48:15,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975706658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:48:15,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:48:15,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 17:48:15,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551637467] [2022-07-21 17:48:15,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:48:15,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:48:15,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:15,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:48:15,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:48:15,645 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-07-21 17:48:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:15,698 INFO L93 Difference]: Finished difference Result 145 states and 163 transitions. [2022-07-21 17:48:15,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:48:15,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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 36 [2022-07-21 17:48:15,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:15,699 INFO L225 Difference]: With dead ends: 145 [2022-07-21 17:48:15,699 INFO L226 Difference]: Without dead ends: 145 [2022-07-21 17:48:15,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:48:15,708 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 37 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:15,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 488 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 137 Unchecked, 0.0s Time] [2022-07-21 17:48:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-21 17:48:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 135. [2022-07-21 17:48:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 106 states have (on average 1.3679245283018868) internal successors, (145), 126 states have internal predecessors, (145), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:15,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2022-07-21 17:48:15,712 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 36 [2022-07-21 17:48:15,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:15,712 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2022-07-21 17:48:15,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-07-21 17:48:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2022-07-21 17:48:15,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 17:48:15,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:15,713 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:15,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-21 17:48:15,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:48:15,924 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:15,924 INFO L85 PathProgramCache]: Analyzing trace with hash -483056332, now seen corresponding path program 2 times [2022-07-21 17:48:15,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:15,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711562893] [2022-07-21 17:48:15,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:48:15,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:15,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:15,926 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) [2022-07-21 17:48:15,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-21 17:48:16,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:48:16,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:48:16,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:48:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:48:16,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:48:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 17:48:16,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:16,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711562893] [2022-07-21 17:48:16,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711562893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:48:16,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:48:16,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-21 17:48:16,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481277966] [2022-07-21 17:48:16,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:48:16,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:48:16,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:16,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:48:16,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:48:16,148 INFO L87 Difference]: Start difference. First operand 135 states and 153 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) [2022-07-21 17:48:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:16,165 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2022-07-21 17:48:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:48:16,166 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 [2022-07-21 17:48:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:16,166 INFO L225 Difference]: With dead ends: 104 [2022-07-21 17:48:16,166 INFO L226 Difference]: Without dead ends: 104 [2022-07-21 17:48:16,167 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:48:16,167 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 165 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:16,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 144 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:48:16,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-21 17:48:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-07-21 17:48:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 80 states have (on average 1.4125) internal successors, (113), 99 states have internal predecessors, (113), 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) [2022-07-21 17:48:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2022-07-21 17:48:16,171 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 37 [2022-07-21 17:48:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:16,171 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2022-07-21 17:48:16,171 INFO L496 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) [2022-07-21 17:48:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2022-07-21 17:48:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 17:48:16,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:16,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:16,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:48:16,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:48:16,383 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:16,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash 784588468, now seen corresponding path program 1 times [2022-07-21 17:48:16,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:16,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205759937] [2022-07-21 17:48:16,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:16,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:16,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:16,385 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) [2022-07-21 17:48:16,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 17:48:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:48:16,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:16,511 INFO L390 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 [2022-07-21 17:48:16,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-21 17:48:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:48:16,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:48:16,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:16,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205759937] [2022-07-21 17:48:16,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205759937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:48:16,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:48:16,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 17:48:16,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655104222] [2022-07-21 17:48:16,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:48:16,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:48:16,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:16,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:48:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:48:16,611 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2022-07-21 17:48:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:17,340 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2022-07-21 17:48:17,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:48:17,341 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 37 [2022-07-21 17:48:17,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:17,341 INFO L225 Difference]: With dead ends: 122 [2022-07-21 17:48:17,341 INFO L226 Difference]: Without dead ends: 122 [2022-07-21 17:48:17,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:48:17,342 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 132 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:17,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 316 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:48:17,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-21 17:48:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2022-07-21 17:48:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 100 states have internal predecessors, (114), 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) [2022-07-21 17:48:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2022-07-21 17:48:17,346 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 37 [2022-07-21 17:48:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:17,346 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2022-07-21 17:48:17,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2022-07-21 17:48:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2022-07-21 17:48:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 17:48:17,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:17,347 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:17,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-21 17:48:17,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:48:17,552 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1447561176, now seen corresponding path program 1 times [2022-07-21 17:48:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:17,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766566445] [2022-07-21 17:48:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:17,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:17,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:17,554 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) [2022-07-21 17:48:17,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-21 17:48:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:17,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 17:48:17,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:17,722 INFO L390 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 [2022-07-21 17:48:17,847 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:48:17,847 INFO L390 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 [2022-07-21 17:48:17,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:48:17,987 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:48:17,988 INFO L390 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 19 treesize of output 22 [2022-07-21 17:48:18,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-07-21 17:48:19,081 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:48:19,081 INFO L390 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 35 treesize of output 23 [2022-07-21 17:48:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:48:19,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:48:19,233 INFO L390 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 21 [2022-07-21 17:48:19,316 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_844 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_844) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) is different from false [2022-07-21 17:48:19,328 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_844 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_844) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|))) is different from false [2022-07-21 17:48:19,337 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:48:19,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-07-21 17:48:19,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-07-21 17:48:19,346 INFO L390 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 6 treesize of output 4 [2022-07-21 17:48:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-21 17:48:19,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:19,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766566445] [2022-07-21 17:48:19,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766566445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:48:19,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:48:19,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2022-07-21 17:48:19,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100338909] [2022-07-21 17:48:19,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:48:19,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 17:48:19,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 17:48:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=696, Unknown=3, NotChecked=106, Total=870 [2022-07-21 17:48:19,717 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:48:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:21,917 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-07-21 17:48:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:48:21,918 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2022-07-21 17:48:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:21,918 INFO L225 Difference]: With dead ends: 89 [2022-07-21 17:48:21,918 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 17:48:21,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=149, Invalid=1262, Unknown=3, NotChecked=146, Total=1560 [2022-07-21 17:48:21,919 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:21,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1048 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 653 Invalid, 0 Unknown, 160 Unchecked, 1.3s Time] [2022-07-21 17:48:21,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 17:48:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-21 17:48:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.353846153846154) internal successors, (88), 84 states have internal predecessors, (88), 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) [2022-07-21 17:48:21,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-07-21 17:48:21,927 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 38 [2022-07-21 17:48:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:21,928 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-07-21 17:48:21,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:48:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-07-21 17:48:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:48:21,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:21,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:21,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-21 17:48:22,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:48:22,139 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:22,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:22,140 INFO L85 PathProgramCache]: Analyzing trace with hash -306294352, now seen corresponding path program 1 times [2022-07-21 17:48:22,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:22,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451146910] [2022-07-21 17:48:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:22,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:22,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:22,141 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) [2022-07-21 17:48:22,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 17:48:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:22,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 17:48:22,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:22,949 INFO L356 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-07-21 17:48:22,949 INFO L390 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 79 treesize of output 55 [2022-07-21 17:48:22,955 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:48:22,956 INFO L390 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 60 treesize of output 31 [2022-07-21 17:48:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:48:23,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:48:23,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:23,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451146910] [2022-07-21 17:48:23,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451146910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:48:23,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:48:23,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 17:48:23,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960533842] [2022-07-21 17:48:23,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:48:23,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 17:48:23,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:23,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 17:48:23,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-07-21 17:48:23,006 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 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) [2022-07-21 17:48:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:24,117 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2022-07-21 17:48:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:48:24,118 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 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 41 [2022-07-21 17:48:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:24,119 INFO L225 Difference]: With dead ends: 109 [2022-07-21 17:48:24,119 INFO L226 Difference]: Without dead ends: 109 [2022-07-21 17:48:24,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 17:48:24,120 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 286 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:24,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 581 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:48:24,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-21 17:48:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2022-07-21 17:48:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.34375) internal successors, (86), 83 states have internal predecessors, (86), 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) [2022-07-21 17:48:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-07-21 17:48:24,123 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 41 [2022-07-21 17:48:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:24,123 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-07-21 17:48:24,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 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) [2022-07-21 17:48:24,124 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-07-21 17:48:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:48:24,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:24,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:24,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:48:24,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:48:24,335 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:24,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:24,335 INFO L85 PathProgramCache]: Analyzing trace with hash -306241737, now seen corresponding path program 1 times [2022-07-21 17:48:24,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:24,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681922931] [2022-07-21 17:48:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:24,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:24,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:24,337 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) [2022-07-21 17:48:24,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 17:48:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:24,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 17:48:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:24,547 INFO L390 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 [2022-07-21 17:48:24,705 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:48:24,705 INFO L390 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 [2022-07-21 17:48:24,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:48:24,870 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:48:24,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-21 17:48:25,224 INFO L390 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 45 treesize of output 33 [2022-07-21 17:48:25,428 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:48:25,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2022-07-21 17:48:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:48:25,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:48:25,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-07-21 17:48:25,895 INFO L356 Elim1Store]: treesize reduction 5, result has 77.3 percent of original size [2022-07-21 17:48:25,896 INFO L390 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 28 treesize of output 27 [2022-07-21 17:48:25,909 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_939 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_939))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse0)) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select .cse1 .cse0) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) is different from false [2022-07-21 17:48:25,930 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_939 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_939))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) (= (select (select .cse1 .cse0) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|))))) is different from false [2022-07-21 17:48:25,940 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:48:25,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2022-07-21 17:48:26,023 INFO L356 Elim1Store]: treesize reduction 21, result has 67.2 percent of original size [2022-07-21 17:48:26,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 120 [2022-07-21 17:48:26,048 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:48:26,048 INFO L390 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 93 treesize of output 87 [2022-07-21 17:48:26,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:26,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681922931] [2022-07-21 17:48:26,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681922931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:48:26,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1728827803] [2022-07-21 17:48:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:26,519 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:48:26,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:48:26,520 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:48:26,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-07-21 17:48:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 17:48:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:26,873 INFO L390 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 [2022-07-21 17:48:27,339 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:48:27,340 INFO L390 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 24 [2022-07-21 17:48:27,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:48:27,929 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:48:27,929 INFO L390 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 32 [2022-07-21 17:48:28,682 INFO L390 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 55 treesize of output 39 [2022-07-21 17:48:28,981 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:48:28,981 INFO L390 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 53 treesize of output 28 [2022-07-21 17:48:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:48:29,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:48:29,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-07-21 17:48:29,628 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_986 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_986))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)) (= (bvadd (select |c_#valid| (select (select .cse1 .cse0) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (_ bv1 1)) (_ bv0 1)))))) is different from false [2022-07-21 17:48:29,649 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_986 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_986))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select .cse1 .cse0) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (_ bv1 1))))))) is different from false [2022-07-21 17:48:29,668 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:48:29,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2022-07-21 17:48:29,790 INFO L356 Elim1Store]: treesize reduction 21, result has 67.2 percent of original size [2022-07-21 17:48:29,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 136 [2022-07-21 17:48:29,816 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:48:29,817 INFO L390 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 109 treesize of output 103 [2022-07-21 17:48:38,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1728827803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:48:38,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:48:38,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 37 [2022-07-21 17:48:38,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140452544] [2022-07-21 17:48:38,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:48:38,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 17:48:38,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:48:38,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 17:48:38,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2287, Unknown=7, NotChecked=396, Total=2862 [2022-07-21 17:48:38,663 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 38 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 33 states have internal predecessors, (67), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:40,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:48:40,640 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2022-07-21 17:48:40,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:48:40,640 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 33 states have internal predecessors, (67), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-07-21 17:48:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:48:40,641 INFO L225 Difference]: With dead ends: 90 [2022-07-21 17:48:40,641 INFO L226 Difference]: Without dead ends: 90 [2022-07-21 17:48:40,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=301, Invalid=2900, Unknown=7, NotChecked=452, Total=3660 [2022-07-21 17:48:40,642 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:48:40,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 887 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 671 Invalid, 0 Unknown, 185 Unchecked, 1.2s Time] [2022-07-21 17:48:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-21 17:48:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-21 17:48:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 85 states have internal predecessors, (89), 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) [2022-07-21 17:48:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-07-21 17:48:40,645 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 41 [2022-07-21 17:48:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:48:40,645 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-07-21 17:48:40,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 33 states have internal predecessors, (67), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:48:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-07-21 17:48:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:48:40,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:48:40,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:48:40,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-21 17:48:40,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-07-21 17:48:41,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:48:41,047 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-21 17:48:41,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:48:41,047 INFO L85 PathProgramCache]: Analyzing trace with hash -306241736, now seen corresponding path program 1 times [2022-07-21 17:48:41,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:48:41,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271154349] [2022-07-21 17:48:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:41,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:48:41,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:48:41,049 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) [2022-07-21 17:48:41,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 17:48:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:41,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 17:48:41,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:41,262 INFO L390 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 [2022-07-21 17:48:41,267 INFO L390 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 [2022-07-21 17:48:41,544 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:48:41,545 INFO L390 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 [2022-07-21 17:48:41,553 INFO L390 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 [2022-07-21 17:48:41,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:48:41,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:48:41,758 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:48:41,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-21 17:48:41,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:48:42,317 INFO L356 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-07-21 17:48:42,318 INFO L390 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 83 treesize of output 51 [2022-07-21 17:48:42,326 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:48:42,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2022-07-21 17:48:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:48:42,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:48:44,596 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_1038 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1037 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1038)) (.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1037))) (let ((.cse0 (select (select .cse2 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)) (let ((.cse4 (select (select .cse5 .cse0) .cse3))) (let ((.cse1 (bvadd (_ bv4 32) .cse4))) (and (bvule .cse1 (select |c_#length| (select (select .cse2 .cse0) .cse3))) (bvule .cse4 .cse1)))) (not (= .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) is different from false [2022-07-21 17:48:44,965 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_1038 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1037 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1037)) (.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1038))) (let ((.cse3 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (let ((.cse4 (select (select .cse5 .cse2) .cse3))) (let ((.cse0 (bvadd (_ bv4 32) .cse4))) (and (bvule .cse0 (select |c_#length| (select (select .cse1 .cse2) .cse3))) (bvule .cse4 .cse0)))) (not (= .cse3 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (not (= .cse2 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)))))) is different from false [2022-07-21 17:48:44,992 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:48:44,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 173 [2022-07-21 17:48:45,007 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:48:45,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 117 [2022-07-21 17:48:45,234 INFO L356 Elim1Store]: treesize reduction 28, result has 67.1 percent of original size [2022-07-21 17:48:45,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 313 treesize of output 306 [2022-07-21 17:48:46,170 INFO L356 Elim1Store]: treesize reduction 140, result has 43.8 percent of original size [2022-07-21 17:48:46,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 744 treesize of output 658 [2022-07-21 17:48:46,332 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:48:46,332 INFO L390 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 576 treesize of output 536 [2022-07-21 17:48:46,599 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:48:46,600 INFO L390 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 520 treesize of output 486 [2022-07-21 17:48:58,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:48:58,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271154349] [2022-07-21 17:48:58,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271154349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:48:58,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [923011042] [2022-07-21 17:48:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:48:58,074 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:48:58,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:48:58,075 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:48:58,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-21 17:48:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:48:58,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 17:48:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:48:58,397 INFO L390 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 [2022-07-21 17:48:58,403 INFO L390 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 [2022-07-21 17:48:58,863 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:48:58,864 INFO L390 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 [2022-07-21 17:48:58,873 INFO L390 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 [2022-07-21 17:48:59,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:48:59,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:48:59,300 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:48:59,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-21 17:48:59,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:49:00,512 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:49:00,512 INFO L390 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 83 treesize of output 42 [2022-07-21 17:49:00,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2022-07-21 17:49:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:49:00,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:49:01,683 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_1092 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1091 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1091)) (.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1092))) (let ((.cse0 (select (select .cse4 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse0)) (not (= .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (let ((.cse2 (select (select .cse5 .cse0) .cse1))) (let ((.cse3 (bvadd (_ bv4 32) .cse2))) (and (bvule .cse2 .cse3) (bvule .cse3 (select |c_#length| (select (select .cse4 .cse0) .cse1)))))))))) is different from false [2022-07-21 17:49:02,104 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_1092 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1091 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1092)) (.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1091))) (let ((.cse0 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (let ((.cse1 (select (select .cse5 .cse4) .cse0))) (let ((.cse2 (bvadd (_ bv4 32) .cse1))) (and (bvule .cse1 .cse2) (bvule .cse2 (select |c_#length| (select (select .cse3 .cse4) .cse0)))))) (not (= .cse4 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)))))) is different from false [2022-07-21 17:49:02,127 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:49:02,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 173 [2022-07-21 17:49:02,139 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:49:02,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 117 [2022-07-21 17:49:02,304 INFO L356 Elim1Store]: treesize reduction 21, result has 73.1 percent of original size [2022-07-21 17:49:02,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 306 treesize of output 306 [2022-07-21 17:49:03,044 INFO L356 Elim1Store]: treesize reduction 67, result has 64.0 percent of original size [2022-07-21 17:49:03,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 744 treesize of output 674 [2022-07-21 17:49:03,201 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:49:03,201 INFO L390 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 611 treesize of output 567 [2022-07-21 17:49:03,317 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:49:03,318 INFO L390 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 533 treesize of output 497